CN106202479A - A kind of earth's surface hydrology database construction method being encoded to major key with percentage ratio section - Google Patents
A kind of earth's surface hydrology database construction method being encoded to major key with percentage ratio section Download PDFInfo
- Publication number
- CN106202479A CN106202479A CN201610565531.4A CN201610565531A CN106202479A CN 106202479 A CN106202479 A CN 106202479A CN 201610565531 A CN201610565531 A CN 201610565531A CN 106202479 A CN106202479 A CN 106202479A
- Authority
- CN
- China
- Prior art keywords
- section
- river
- earth
- path system
- percentage ratio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/29—Geographical information databases
Landscapes
- Engineering & Computer Science (AREA)
- Databases & Information Systems (AREA)
- Theoretical Computer Science (AREA)
- Remote Sensing (AREA)
- Data Mining & Analysis (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Revetment (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The present invention relates to a kind of earth's surface hydrology database construction method being encoded to major key with percentage ratio section, comprise the steps: step one, build percentage ratio section coding；Step 2, structure are encoded to the database structure of the earth's surface hydrographic data of major key with percentage ratio section；Step 3, in numerical map, set up section path system with section, and data base is given in the path system of section.The present invention using section coding as major key, by basin code+random code+percentage ratio code section identified and set up network of waterways path system (as a example by Haihe basin) using section as elementary cell, it is achieved that the characteristic functions such as stable extension, dynamic segmentation and the visualization of earth's surface hydrological data bank.
Description
Technical field
The present invention relates to water resource, water environment and Ecology comprehensive knowledge base field, be specially a kind of with percentage ratio section
It is encoded to the earth's surface hydrology database construction method of major key.
Background technology
External and domestic to carry out the example that earth's surface hydrographic data builds a lot, it is set up with practical it is important that the choosing of major key
Selecting and the design of major key coding, but the earth's surface hydrographic data being encoded to major key with percentage ratio section compares, otherwise extensibility,
In dynamic segmentation substantially not enough, or each key element of the earth's surface hydrology be not set up in data base association, substantially cannot be comprehensive
With dialogue.
Such as Pfafstetter section encoding scheme, this coding is applied more in hydrological distribution model, distributed water
Literary composition model first has to set up the information database of the surface drainage in region or basin and then different people is analyzed in simulation (computer)
Class activity is to region or the ecology influence in basin, select rational scheme more afterwards.Pfafstetter section encodes according to basin
Layer level specific rules is: 1) determine the master stream in basin according to the bigger principle of catchment area；2) catchment area in basin is found
Maximum 4 one-level tributaries endowed 2,4,6,8；3) joint in 4 tributaries and master stream is divided into 5 sections master stream, downstream
To upstream the most endowed 1,3,5,7,9, so far complete the first order coding of the network of waterways；4) in like manner to the subordinate's branch in one-level tributary
Encode successively, complete step by step.The something in common that Pfafstetter section coding and percentage ratio section encode all is can be with convection current
Territory carries out division step by step from big to small and coding, and the biggest basin is divided into the least sub basin, and each sub basin
Being endowed unique coding with the network of waterways, encode regular, beneficially computer automatically processes, and coding needed number is less.But collection
When pool divides or the network of rivers changes, coding must be reset, and stability is weak with autgmentability；
At home, at present and the 3 set codings differed greatly are deposited, respectively by mapping, environmental protection, hydraulic department for river
Formulating, Mapping departments use 5 alpha-numerical codes, and environmental administration uses 8 alphabet data hybrid codes, water conservancy
Department uses 8 alphabet data hybrid codes of other set, and same river (the most not to level careful on section) uses
Website on different code names, water system section uses again entirely different coded system, does not the most associate, according to these
Encoding scheme establishes the water resource of a large amount of independent operating, water environment information storehouse, such as the 1:25 ten thousand HYDNT water system of State Bureau of Surveying and Mapping
The data bases such as figure layer, water environmental function zone GIS information bank, water function area dividing GIS information bank, During Pollution Emission Declaration cannot be closed the most completely
Connection and dialogue, let alone comprehensively, all become " isolated island " of information, itself should have related water quality data, water yield data lack
The approach of weary contact thus cannot be comprehensive.
The design of percentage ratio section coding is opened this kind just and is isolated foundation association and overcome Pfafstetter section to encode
The most extendible effective means (simple and practical), in Global Environment Facility's Haihe basin water environment and water resources management project
This kind of earth's surface hydrology database realizing of middle foundation features described above and function, and as the basis of integrated database, obtain
The consistent accreditation of domestic and international expert.
Summary of the invention
For solving above-mentioned deficiency of the prior art, it is an object of the invention to provide one and be encoded to percentage ratio section main
The earth's surface hydrology database construction method of key, the present invention encodes as major key, with basin code+random code+percentage ratio code using section
Section is identified and is set up network of waterways path system (as a example by Haihe basin) using section as elementary cell, it is achieved that ground
The characteristic functions such as stable extension, dynamic segmentation and the visualization of table hydrological data bank.
It is an object of the invention to use following technical proposals to realize:
The present invention provides a kind of earth's surface hydrology database construction method being encoded to major key with percentage ratio section, and it improves it
Place is, described method comprises the steps:
Step one, structure percentage ratio section coding；
Step 2, structure are encoded to the earth's surface hydrology database structure of major key with percentage ratio section；
Step 3, in numerical map, set up section path system with section.
Further, in described step one, described percentage ratio section is encoded to the identity card of surface water elementary cell section
Number, each section has uniqueness, by inquiry section coding i.e. can find this section and retrieve on section its
His relevant information, each section once assignment, not reset because of the change in the network of rivers, described percentage ratio section encodes by 3 part groups
Become, be respectively as follows:
(1) part 1 is made up of B+SSS, and wherein B is 1 letter, represents basin；SSS is 6 bit digital, represents subflow
Territory；
(2) part 2 is 6 bit digital Nnnnnn, the random digital code given of each section, Yi Tiaohe in expression tertiary area
Duan Yidan gives a numeral, then this numeral just becomes the unique of this section and permanent symbol together with tertiary area code, throughout one's life
Constant, the uniqueness of section coding；
(3) third portion is made up of Ffffff+Tttttt, and third portion reflects whole section, reflects in certain point or section
A part；Ffffff is the starting point length percent in this section, and Tttttt is the terminal length percent in this section, if
It is that point then Ffffff and Tttttt numerical value is equal；If weigh the relative position on section by length percent, no matter then section
Length, Ffffff+Tttttt all changes between 0 to 100.
Further, in described step 2, described earth's surface hydrology database structure includes: be encoded to main with percentage ratio section
Key builds the tables of data of earth's surface hydrological data bank, described tables of data effluent section path system attribute list and supporting table composition；
In point, line, surface and event 4 class object, main object is the section path system of section composition, i.e. dynamic segmentation
Chain in model, including section and segmental arc；Described supporting table includes planar water body attribute list, point-like website attribute list and event
Table；Described event table is an event table or line event table.
Further, described step 3 comprises the steps:
<1>data prepare, and refine including coarse river digitized, the drafting of virtual streamline on planar water body, with
And the flow direction of current is determined according to each streamflow data；
<2>section identifies and divides, and the principle that naturally crosses according to river divides and identifies section, and sets up path, section system
System；
<3>generalization in river and rank determine；
<4>section path system is set up and WATERBODY figure layer, the interpolation of attribute information；
<5>quality control.
Further, in described step<1>, coarse river digitized carries out refining the river bottom referred to coarse
On segmental arc and node is modified or supplement；
The streamline of section path system is the path network system of the one-dimentional structure represented with wire, represents for planar
Water body, artificial adds boost line to ensure the connection of streamline, the most virtual streamline of boost line at planar water body mid portion；Described
The river line of virtual streamline and water system is put on an equal footing, and distinguishes on condition code row in attribute list and WATERBODY section code
Come；
The flow direction is the key character of water body, must reflect the direction of current and record at attribute in the path system of section
In storehouse, there is FNODE and TNODE two to arrange respectively to record starting point node number and the terminal of section in the attribute library of section path system
Node number, judges the upstream-downstream relationship of section by starting point node number and peripheral node number；Natural river is flowed to be clear and definite
, but for the big river of lock control and canal artificial affecting it should be understood that water flow data are judged.
Further, in described step<2>, the river principle that naturally crosses includes:
The most same characterization rules: refer to the water body type that feature is single；For the water body that type is identical, even having difference
The segment of feature, it is possible to be defined as a section；For different types of water body, it is defined as different sections；
2. joint rule: refer to that a transport section is the water body that the segment type between current joint is consistent；Water
Stream joint includes river starting point and river mouth；
The bifurcated of current is treated as joint under this convention, it is adaptable in current the most forked situation continuously
Under；
3. branch line rule: be applicable to when flowing into and out planar water body auxiliary streamline, it is to avoid at planar water body area weight
New division current channel, node and bifurcation.
Further, in described step<3>, stream order refers to each water in the path system of digital code mark section
The primary-slave relation of stream, is that the stream order that numeral is the least is the highest according to the definition rule of general identification code；For rank identical and
Entering the river that position, master stream is different, increase field Levelid in the path system attribute list of section, field is integer number
Word, assignment is in the scope that stream order is identical.
Further, described step<4>comprises the steps:
A, the reading of start and end node number；
B, the calculating of section length, changed by coordinate projection and data association obtains；
C, the determination of river, place, section title；
D, the determination of place, section river pattern；
E, the determination of place, section stream order, artificial assignment and correction on the basis of the general fractional analysis in river；
F, the automatic identification of artificial streamline section.
Further, in described step<5>, quality control includes:
(1) whether arbitrary section of whole section path system can downstream travel through, until entering Haihe River section or TFLAG value
It is defined as the section of 1；
(2) whether arbitrary section of whole section path system can upstream travel through, until section, riverhead or SFLAG value
It is defined as the section of 1；
(3) upstream travel through on this river between arbitrary Levelid section or downstream travel through the most continuous, until
Arrive section, high one-level other river；
Determine that above-mentioned three are checked by following four Basic examination function:
Function one: an optional section, finds out LEVELID same with this section, i.e. same river and be in this section
All sections of upstream；
Function two: an optional section, finds out LEVELID same with this section, i.e. same river and be in this section
All sections in downstream；
Function three: an optional section, finds out all sections being in this downstream, section in the path system of whole section；
Function four: an optional section, finds out all sections being in this upstream, section in the path system of whole section；
As the program checkout in aforementioned four function reports an error, then return step 3, check whether river streamline links up, section
Flow direction is the most correct；As the program checkout in four functions is passed through, then the section water system traversing graph of formation is supplied to sea
Relevant departments of river profit committee, correcting errors of consulting water system traversal；
As above-mentioned steps is all passed through, then to set up work the completeest for the spatial topotaxy of Haihe basin section path system
Become.
In order to some aspects of the embodiment disclosed are had a basic understanding, shown below is simple summary.Should
Summarized section is not extensive overview, is not key/critical component to be determined or the protection domain describing these embodiments.
Its sole purpose is to present some concepts, in this, as the preamble of following detailed description by simple form.
Compared with immediate prior art, the excellent effect that the technical scheme that the present invention provides has is:
The present invention using section coding as major key, with basin code+random code+percentage ratio code section identified and with
Network of waterways path system (as a example by Haihe basin) is set up as elementary cell in section, it is achieved that the stable expansion of earth's surface hydrological data bank
The characteristic functions such as exhibition, dynamic segmentation and visualization.These characteristics are that earth's surface hydrological data bank creates comprehensive knowledge as " skeleton "
Laying a good foundation in storehouse, solves and the most expansible, inter-sectional in domestic existing earth's surface hydrology database establishment isolate, do not merge
A difficult problem, using it as the reference of different user earth's surface hydrology related data, it is achieved sharing of data, this data base mainly can apply
On the hardware and software platforms such as water pollution emergency aid decision-making system, basin comprehensive knowledge base.
This invention is mainly characterized by:
Recognizability: each section is with unique percentages code identification, and once assignment is unchangeable, with basin code-random
Sequence code+starting and terminal point percentage ratio combination, has certain readability, can read basin and subflow from coding
Territory, the earth's surface hydrology data sheet field recording these row is major key field, with its association water system on website, zoning, sub basin with
And the various comprehensive knowledge base information such as various monitor value, value of calculation, thus create the huge and comprehensive knowledge base of complexity.
Extensibility: do not cause the rearrangement of coding because of the change in the network of rivers, percentage ratio section encoding scheme solves earth's surface
The stability problem of section coding in the construction of water system GIS-Geographic Information System, it is also possible to being referred to as the toughness of earth's surface hydrographic data, this is
This invention is better than the more important of other similar schemes.
Connectivity: earth's surface hydrological data bank is also section path system, have recorded the topological relation that water system is actual, has water
The connectivity of system, has special field record section beginning and end node code, water system source of can tracing back accordingly in the hydrology tables of data of earth's surface
Head, up to water system river mouth, the arbitrary portion of convenient and swift lookup surface drainage, this point be further exploitation pollution emergency commander system
The basis of system, further illustrates the practicality of the earth's surface hydrological data bank that the method is set up.
Dynamic segmentation: either or can define and position section from the path system of section from coding and take up an official post
Meaning a little and any one section, this point can realize on the codimg logic of percentage ratio section and in HD actual motion point on section, line and
The organic unity in face (representing website, zoning and sub basin respectively).
Visualization property: the space attribute of the SHAPE field record section in HD, that can show on section on GIS is various
Data and to water system and the evaluation result in basin, in order to complete data and result perspective analysis, implement water resource water environment and
The aid decision of Ecology Resolving probiems.
Comprehensive practical: be divided into section, each section with percentage ratio code identification, composition water system path, section system in water system
Under system, the spatial topotaxy of data-base recording path system and this method of percentage ratio code identification extension section, perfect mould
Intended the hydrology world, earth's surface and utilize that it is expansible, connectivity, dynamic segmentation, visualization property prop up comprehensive knowledge base, become
The basis of comprehensive knowledge base.
For above-mentioned and relevant purpose, one or more embodiments include will be explained in below and in claim
In the feature that particularly points out.Description below and accompanying drawing describe some illustrative aspects in detail, and its instruction is only
Some modes in the utilizable various modes of principle of each embodiment.Other benefit and novel features will along with under
The detailed description in face is considered in conjunction with the accompanying and becomes obvious, the disclosed embodiments be intended to include all these aspect and they
Equivalent.
Accompanying drawing explanation
Fig. 1 is that the lakeland that the present invention provides touches off and the schematic diagram of the connecting line of river line outside lake；
Fig. 2 is the schematic diagram that the same river that the present invention provides has the segment of different characteristic；
Fig. 3 is the example schematic diagram of the joint rule that the present invention provides；
Fig. 4 is the example schematic diagram of the bifurcated rule that the present invention provides；
Fig. 5 is the schematic diagram that the stream order that the present invention provides determines；
Fig. 6 is that the section streamline (Flowline) that the present invention provides has " gap " (GAP) to exist, in causing traversal improper
Disconnected schematic diagram；
Fig. 7 is the schematic diagram that the arrow of three sections A, B, C that the present invention provides has been pooled to a bit；
Fig. 8 is the technology path that application earth's surface hydrological data bank-section path system that the present invention provides integrates two zonings
Figure；
Fig. 9 is earth's surface, Haihe River hydrology database data (knowledge) the conformable frame figure that the present invention provides；
Figure 10 is the ratio relatively schematic diagram of the percentage ratio section coding that the present invention provides；
Figure 11 is that the extensibility of the Pfafstetter section coding that the present invention provides compares schematic diagram；
Figure 12 is the source in certain master stream (the such as Luanhe River) in the specific embodiment constant current territory really that the present invention provides
Head from Bohai Sea mouth until the schematic diagram in source；
Figure 13 is that certain master stream (the such as Luanhe River) in the specific embodiment constant current territory really that the present invention provides is from one
Source is until entering the schematic diagram of Bohai Sea mouth；
Figure 14 is upstream and the schematic diagram of tributary water system thereof of certain point that the present invention provides；
Figure 15 is the schematic diagram of the coding of the complete percentage ratio section that the present invention provides；
Figure 16 is the schematic diagram of the Haihe basin section path system (in figure, white point is the node of section) that the present invention provides；
Figure 17 is a kind of earth's surface hydrology database construction method flow process being encoded to major key with percentage ratio section that the present invention provides
Schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail.
The following description and drawings illustrate specific embodiments of the present invention fully, to enable those skilled in the art to
Put into practice them.Other embodiments can include structure, logic, electric, process and other change.Embodiment
Only represent possible change.Unless explicitly requested, otherwise individually assembly and function are optional, and the order operated is permissible
Change.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.This
The scope of bright embodiment includes the gamut of claims, and all obtainable equivalent of claims
Thing.In this article, these embodiments of the present invention can be represented by " inventing " individually or generally with term, and this is only
For convenience, and if in fact disclose the invention more than, it is not meant to automatically limit this application in the range of appointing
What single invention or inventive concept.
Term is explained as follows:
1. section (Reach): the one section of water body naturally crossed in surface drainage or the centrage of Hu Ku, in data base
Represent with wire.
2. section path system (FLOWLINE): there is UNICOM with what section after the unique mark of percentage ratio section coding was set up
The section path system of property, with attributes such as section terminus node number, section rank length, is earth's surface hydrological data bank
Core content, has connectivity, dynamic segmentation and practicality comprehensive.
3. earth's surface hydrological data bank (HD): in a computer reality surface drainage is identified management data management soft or hard
Part system, on the basis of being typically found at GIS-Geographic Information System.
4. basin water resources and water environment integrated management knowledge base (integrated database): be basin water resources-water environment-water
Ecology synthesis manages the storage of information, manages and share switching centre, and it sets up information resources exchange on the water, shared, integration
On the basis of excavating, realize basin water resources-water environment-Ecology integrated management service for the department such as water conservancy, environmental protection.
The present invention provides a kind of earth's surface hydrology database construction method being encoded to major key with percentage ratio section, its flow chart
As shown in figure 17, three aspects are mainly included: one be the design of percentage ratio section coding, two be the earth's surface hydrology with it as major key
Data library structure design, three be in numerical map with section set up water system path system and give it by database structure
In, this three aspect is all that this invention needs to be protected by part.
Step one: percentage ratio section code Design
Percentage ratio section coding is made up of 3 parts, and (1) part 1 is made up of B+SSS, the small watershed at reflection place, section
(can be as accurate as 4 grades), such as Haihe basin is divided into 15 water resource tertiary areas, and C020200 then represents Yongdinghe River volume water in field
The above tertiary area in storehouse；(2) part 2 is 6 bit digital Nnnnnn, the random digital code given of each section in expression tertiary area,
Article one, section once gives a numeral, then this numeral just becomes the unique of this section and permanent symbol together with tertiary area code
Number, the most constant, thereby ensure that the uniqueness that section encodes；(3) third portion is made up of Ffffff+Tttttt, and this part can
To reflect that a part in certain point or section also can be reflected in whole section.Ffffff is the starting point length percent in this section,
Tttttt is the terminal length percent in this section, if it is equal to put then Ffffff and Tttttt numerical value.Use length percentage
Than the relative position weighed on section, no matter then section length, Ffffff+Tttttt changes between 0 to 100, it is ensured that compile
Code unified and standard, most importantly can maintain the stable with expansible of coding.
Table 1 section coding structure table
Percentage ratio section coding is surface water elementary cell section " ID (identity number) card No. ", and each section has uniquely
Property, i.e. can find this section and other relevant informations retrieving on section by inquiry section coding, such as length, stream
The all multi information of amount, flow velocity, water quality objective etc., and each section once assignment, can not reset because of the change in the network of rivers.
Step 2, Structural Design of Hydrological Database
It is encoded to major key with percentage ratio section and devises earth's surface hydrological data bank key data list structure, this series data table
Effluent section attribute list and supporting table three class composition.In point, line, surface and event 4 class object, main object is the river of section composition
Section path system (FLOWLINE), i.e. chain in dynamic segmentation model (containing section, segmental arc), its object properties are shown in Table 2.Table 3 is
The corresponding attribute list of two-wire water body part (adding " boost line " in streamline) in streamline.Table 4 is Point element attribute list.Table 5
For event table, event can be some event, it is possible to for line event (if function zoning is exactly the line event on section), this table can basis
Demand Design is multiple.
Table 2 section path attribute table
Note: table based on table 1 and table 2.
Table 3 planar (Hu Ku) water body attribute list
Table 4 point-like (website) attribute list
Table 5 event table
The hydrology data base set list of above earth's surface has section coding i.e. Reachno field, section coding be all with
On list and increase the field that data message table is indispensable as required newly later.Section coding is all data messages in system
Table associates, retrieve, the major key inquired about, basis field, can be by point (website) water-related in basin, line (zoning) by it
The message linkages such as dough-making powder (gathering ground) get up formed an organic whole, for integrated database search, analyze, excavating creation can
Energy.
Step 3, section path system and attribute library realize
The present invention designs in sea according to database structures such as above-mentioned percentage ratio section code Design and section water system path systems
River valley constructs this data base (genus domestic initiation), concretely comprises the following steps:
1. data prepare, and refine including coarse river digitized, as improper " gap " (GAP) between section enters
Row connection etc., the drafting of the upper virtual streamline (Artificial Flowline) of planar water body (such as reservoir, lake or marsh), root
The flow direction etc. of current is determined according to each streamflow data；
Data prepare to include that breakpoint connects, adds the work such as artificial streamline, the amendment flow direction, due to 1:25 ten thousand electronics base map quality
Not reaching the basic demand of earth's surface hydrological data bank, segmental arc on bottom, node etc. need to modify or supplement, and all repair
Change and supplement the continued integrity being provided to ensure path, section (FLOWLINE), including the adding of virtual streamline of next step
Adding, occur in particularly Fig. 6 is as mutually reciprocity in improper " gap " (GAP) between section or difference segmental arc direction, same river
Situation must be corrected, and otherwise topological relation can be chaotic unclear.
FLOWLINE streamline is the path network system of the one-dimentional structure represented with wire, and it must be continuous whole anti-
Reflecting the connection of current, for the river water represented with wire on 1:25 ten thousand electronic chart, this point is no problem, but for river width
These water bodys represented with planar such as relatively big or lake and reservoir, need artificial to add boost line at water body mid portion
(Artificial Flowline), to ensure the connection of streamline, touches off and river line outside lake at lakeland as shown in Figure 1
Connecting line, these boost lines with lake outside river line as treat, and in attribute list condition code row and WATERBODY section
Distinguish on Ma.
The flow direction is the key character of water body, must reflect the direction of current also in FLOWLINE path network system
Record, in attribute library, has FNODE and TNODE two to arrange respectively to record the starting point node number of section in the attribute library of FLOWLINE
With peripheral node number, may determine that the upstream-downstream relationship of section by it.
Natural river is flowed to be clear and definite, but for the big river of the artificial affectings such as lock control and canal it should be understood that
The data such as water flow are judged.
Natural river is flowed to be clear and definite, but for the big river of the artificial affectings such as lock control and canal it should be understood that
The data such as water flow are judged.As shown in Figure 1.
2. section identifies and divides, and the principle that mainly naturally crosses according to river divides and identify section, and sets up path system
System.
It completely newly and is very important concept that section (REACH) is one in the hydrological data bank of Haihe basin earth's surface,
It is the elementary cell of FLOWLINE path network system, just as the square brick in building.Type division, definition method to it
And coding etc. is substantially with reference to the thinking in the hydrological data bank of earth's surface.
Section is the surface water segment that hydrological characteristics is similar, has divided four class sections in the hydrological data bank of earth's surface, actual adopts
With three kinds of sections, being transport, coastline, and waterbody section respectively, transport, coastline are
Based on profile；And waterbody is based on planar feature.HAIHE earth's surface hydrological data bank does not temporarily use
Coastline, uses transport and waterbody two class section.
Flowline path network is made up of transport section completely, " the small stream in its main representative water body type
Water/river ", " canal/irrigation canals and ditches ", the water body type such as " discharge conduit " and " Artificial Flowline ", be in section the most
An important class, typically has three kinds of definition rules to determine its final position for transport section: 1 is same feature
Rule；2 is joint rule；3 is branch line rule.
Same characterization rules refers to the water body type that feature is single, streams/river such as purely.
For the water body that type is identical, even such as same river has the segment of different characteristic, it is also possible to definition
Be a section (REACH), as in figure 2 it is shown, section 1 by 3 segments (1 season section, 1 non-quarter sections and 1 pass through Hu Ku
Artificial streamline) composition.
For the water body without type, it is defined as different sections, as it is shown on figure 3, epimere water body is canal, hypomere water body
For channel, i.e. it is divided into two sections of 1A and 2B.
Joint rule refers to that a transport section is between current joint (including river starting point, river mouth etc.)
The water body that segment type is consistent.Under this kind of rule, the bifurcated of current also serves as joint and treats, and does not has bifurcated continuously at current
In the case of (as shown in Figure 4), in this, rule can be suitable for.Circle in Fig. 3 is node, this section is drawn according to node division rule
It is divided into 1A/2B/3C/4D/5E to amount to 5 each sections (REACH).
Bifurcated rule typically uses more when flowing into and out the human assistance streamline in planar water body such as Hu Ku/pond,
It avoids repartitions current channel, node and bifurcation in planar water body area, as shown in Figure 4, has 10 at marshland endemic area
Individual above segmental arc, is defined as a section by bifurcated rule, comprises five segments of A, B, C, D, E, and if pressing joint rule
The most just should be divided into 5 sections.Mainly section is divided according to these 3 kinds of rules in the hydrological data bank of Haihe basin earth's surface
(REACH), also according to circumstances to carry out by alteration ruler for exception.
3. generalization in river, rank determine:
Stream order refers to the primary-slave relation of each current in digital code mark river system network, which be main flow, which
Individual is tributary.The definition rule of general identification code is that the stream order that numeral is the least is the highest, as it is shown in figure 5, first define rank
The highest river-1 imparts the river that line flowing directly into sea represents, the river flowing directly into 1 grade of river is 2 grades
River-2 imparts the river that gray line in figure represents, flowing into the river in 2 grades of rivers, to be that 3 rank rivers-3 impart figure mellow lime
The river that line represents, by that analogy, in the hydrological data bank of earth's surface, stream order has reached more than 9 grades according to this, and river gathers, and is handing over
Tributary, differentiation master stream at meeting point, general foundation flow determines；Flow big for master stream, flow little for tributary.
The water body of more than 5 grades in 1:25 ten thousand topographic database has a name code, is stored in the HYDC of attribute list
In field, last bit digital of these 6 character codes represents stream order, and 15 represent 15 grades of rivers respectively, and 6 represent
The six grades of rivers expanded, 9 represent Beijing-Hangzhou Grand Canal.More than the 5 grades correct ranks in river can be given accordingly, setting up
FLOWLINE path system retains HYDC field and is obtained with each stream order, for (predominantly canal, north and south, canal
Canal), flow to according to it and situation about crossing with other rank rivers gives the rank being suitable for water resources regionalization segmentation.
Identical and enter different river, position, master stream (the 2 grades of rivers represented such as the two lines in Fig. 5) for rank, in order to
Being distinguish between them, add field Levelid in FLOWLINE attribute list, field is integer numeral, and assignment exists
In the scope that stream order is identical, differentiate the most permissible each other.The little rank of stream order and river at FLOWLINE attribute
Definition in table and being described as follows shown in table 6.
Table 6 FLOWLINE attribute list
| Field name | Form | Explanation |
| Level | Integer | Stream order |
| Levelid | Integer | The differentiation in same rank river |
4. section path system (FLOWLINE) foundation and WATERBODY figure layer etc. and the interpolation of attribute information:
0, with the 1:25 Wan-hai river valley numerical map after above-mentioned process identification as processing object, GIS writes AML journey
Sequence generates the section path system (FLOWLINE) with percentage ratio section for coding, and its attribute list content is the most one by one
Complete:
1, the reading of start and end node number, writes AVENUE SCRIPT Automatic Program and completes to read.
2, the calculating of section length, is changed by coordinate projection and data association obtains.
3, the determination of river, place, section title, writes AVENUE SCRIPT Automatic Program and completes.
4, the determination of place, section river pattern, writes AVENUE SCRIPT Automatic Program and completes
5, the determination of place, section stream order, artificial assignment and correction on the basis of the general fractional analysis in river.
6, the automatic identification of artificial streamline section, program is similar to the identification of river title and type.
5. quality control and data check:
The correctness of section path system water system traversing graph directly influence whole integrated database (KM) system based on
The Development and compilation process of the application software tools of water resource water environment integrated management, determines these application softwaries output result
Correct errors, it can be seen that, Haihe basin water system traversing graph is Haihe basin water resource water environment integrated management desired data information system
One of key element of system.
Affect the basic reason of river system network traversing operation and have a following two aspect:
1, section streamline (Flowline) has " gap " (GAP) to exist, and causes the improper interruption of traversal, as shown in Figure 6:
The success or failure that each step is critically important, concern streamline topological relation sets up, the most more important part
It is illustrated.
In figure 6, there is one " gap " (Gap) in section A between a d and some c, in figure, the dotted line of border circular areas represents
Water system should exist and discontinued streamline in real figure process.In this case, we is set up by GIS software
Topological relation incites somebody to action display A section with C section without upstream-downstream relationship, and this is not inconsistent with practical situation, the existence of this mistake, it will give
Basin water environment and the dynamic management decision-making of water resource provide wrong data message, cause management decision-making to be slipped up.
2, the section flow direction determines incorrect, causes river system network to travel through improper interruption, as shown in Figure 7:
In figure 6, the arrow of three sections A, B, C has been pooled to a bit, and wherein the direction of arrow represents section streamline
Water (flow) direction.Owing to making a mistake when lower reache C flows to and determines by hand, river system network traversal is caused to interrupt at section A, B,
Rather than continuing towards C, we should check this kind of situation, and redefines the flow direction (as shown in gray line C).
For the mistake in terms of two above, need to be programmed three below aspect checking, this is also to prepare data
The detection of effect:
(1) whether arbitrary section of whole river system network can downstream travel through, until entering Haihe River section or the definition of TFLAG value
It it is the section of 1.
(2) whether arbitrary section of whole river system network can upstream travel through, until section, riverhead or the definition of SFLAG value
It it is the section of 1.
(3) upstream travel through on this river between arbitrary LEVELID section or downstream travel through the most continuous, until
Arrive section, high one-level other river.
Inspection reports an error, then need to return space topological establishment step, check whether river streamline links up, and section flow direction is
No correctly；As above-mentioned program checkout is passed through, then the section water system traversing graph of formation is supplied to water development in Hai River Basin committee dependent part
Door, correcting errors of consulting water system traversal.As above-mentioned steps is all passed through, then the spatial topotaxy of Haihe basin section path system
Set up work to be correctly completed.
Two functional areas integration etc. are applied:
In Haihe basin and deposit two kinds of the most similar but also different zonings, water function area dividing that i.e. hydraulic department divides and ring
The water environmental function zone that border protection department divides.The integrating of two functional areas can realize environomental pollution source, water quality number
According to the unification with water yield data, finally lay the foundation for water resource and water environment integrated management.
Setting up the earth's surface hydrological data bank that percentage ratio section path system is core is the effective technology integrating different zoning
Means, two function zonings are also the critical events on the path system of section.With section path system to different zoning degree of carrying out
Amount, disassembles analysis by its dynamic segmentation function by zoning, form the zoning under the coding contact of percentage ratio section comprehensive, it is to avoid district
The overlap drawn and the conflict of water quality objective, also expand the water body scope of original zoning.Application earth's surface hydrological data bank-section
Path system integrates the technology path of two zonings as shown in Figure 8.
The comprehensive practical of section path system can be with the such as hydrologic monitoring of other data or polluter data etc. and complex zone
Draw target to connect, for realizing the function zoning Analysis to reach standard of integrated management, blowdown License Management, water drawal permission management etc.
Preparatory condition.
Earth's surface, Haihe River hydrological data bank being encoded to clue structure with percentage ratio section plays in whole integrated database
The pivotal role that Data Integration is integrated, various data bases realize contact by section coding in Haihe basin percentage: put class number
Associate according to being set up by event table and section, Haihe River coding with line class data, face class data (as Land_use change, etc.) to pass through GIS folded
Adding analysis to associate with the coding foundation of section, Haihe River, SWAT model distributed hydrological model is essentially all soil by which
Ground, Soil Utilization data connect with sub basin.Visible, Haihe basin percentage ratio section be encoded to aggregation of data analysis and
The effective expression of scenario analysis conclusion has prepared a good basic platform.Earth's surface, Haihe River hydrology database data (knowledge) is whole
Close frame diagram as shown in Figure 9.
The management building too busy to get away geographic element data of water resource water environment knowledge base and the application of technology (GIS): 1.
The spatiality of water resources and water environment management needs GIS to be shown and embodies；2. the complexity of water resources and water environment management is many
Degeneration needs the in addition coordinate of the relative stability by geographic element to weigh, to improve stablizing of water resource water environment information storehouse
Property；3. water resource water environment data message is set up on geographic element, can improve the sharing in resources and environment information storehouse.
The selection of stable geographic element is the key that water resource water environment information storehouse is built, and selects section as coding
Main object and the most basic clue of knowledge base are wise effective select, just as managing the information of group, their key element
Everyone, event between interhuman relation and person to person phenomenons such as (cooperate) conflicts, relation, event phase
It is changeable indefinite to want for people, and people's metastable Fundamentals during to be crowd manage, its symbolization identification card number (as
Branding is equally with everyone all one's life, the most constant) just become the major key in crowd's management information bank, it is information tissue and looks into
Ask " main thread " of retrieval, be " leading ".
Use for reference the core technology percentage ratio river of National Hydrologic Database (NHD) method for building up applying 20 years as long as in the U.S.
Section coding techniques, selecting section at home in resources and environment information knowledge base first is that clue (major key) designs and establishes sea
River valley earth's surface hydrological data bank, has filled up the codeless blank in domestic section, for information, the Knowledge Integration of water resource water environment
And share create a feasible data path, make integrated management be possibly realized technically.
Embodiment
Illustrate 1: percentage ratio section coding compares with the extensibility of Pfafstetter section coding:
Percentage ratio section coding meets the uniqueness of general section coding, the most operable, with other encoding schemes (such as
Pfafstetter section encodes) advantage that compares is, does not causes the rearrangement of coding because of the change in the network of rivers (or mistake), tool
There are bigger motility and stability.As shown in Figure 10.
Pfafstetter section coding uses odevity to distinguish tributary and master stream, and next stage is raised the price after previous stage, coding
Length disunity；Rely on the judgement in 4 maximum tributaries, once get the wrong sow by the ear or revise wrong needs of water system map, compare
When the change of example chi needs to increase river branch greatly, Pfafstetter section coding needs assignment again.As shown in figure 11.
Figure 11 is the change figure of water system, and the section of bottom encodes whole section with percentage ratio section and is encoded to
(C is large watershed alpha code, such as Haihe basin to C030600001375000000100000, and 030600 is certain subflow under it
Territory, the such as Luanhe River, 001375 is the random order code of Nei Ge section, this basin, after the starting point percentage ratio of section and terminal percentage
Than), if if in a new tributary, midpoint of this section, according to percentage ratio section, the two sections of each own codings being divided into are respectively
C030600001375050000100000 and C03060000137500000005000, its coding does not change；And use
Pfafstetter section encodes, and before not being newly added tributary, this section is encoded to 1, becomes 1 and 3 after adding tributary.
Autgmentability is with stability through comparing, and both difference are obvious.
Illustrate 2: trace back and trace back under river mouth etc. connectivity in percentage ratio coding water system source, section
Earth's surface hydrological data bank is also section path system, have recorded the topological relation that water system is actual, has the connection of water system
The general character, has a special field record section beginning and end node code in the hydrology tables of data of earth's surface, water system source of can tracing back accordingly, can
Reaching water system river mouth, the arbitrary portion of convenient and swift lookup surface drainage, this point is to develop pollution emergency command system further
Basis, further illustrates the practicality of the earth's surface hydrological data bank that the method is set up.
In Figure 12, red line is the master stream, the Luanhe River of Haihe basin, at the Haihe basin surface water set up with percentage ratio section coding
In literary composition data base, can quickly determine the source in certain master stream (the such as Luanhe River) in basin from Bohai Sea mouth until source
Head.
In Figure 13, red line is the master stream, the Luanhe River of Haihe basin, at the Haihe basin surface water set up with percentage ratio section coding
In literary composition data base, can quickly determine certain master stream in basin (the such as Luanhe River) from a source until enter the Bohai Sea
Mouthful.
In Figure 14, red line is the Luanhe River water system of Haihe basin, at the Haihe basin surface water set up with percentage ratio section coding
In literary composition data base, can quickly set upstream and the tributary water system thereof of certain point.
Illustrate 3: Haihe basin percentage ratio section is encoded to earth's surface hydrological data bank
Section coding is made up of 3 major parts: (1) part 1 is made up of B+SSS, the water resource three grades at reflection place, section
District.Haihe basin is divided into 15 water resource tertiary areas, and C020200 then represents the above tertiary area of Yongdinghe River Cetian reservoir；(2)
2 parts are 6 bit digital Nnnnnn, and the random digital code given of each section in expression tertiary area, a section once gives one
Individual numeral, then this numeral just becomes the unique of this section and permanent symbol in conjunction with tertiary area code, the most constant, the most not only
Ensure that the uniqueness that section encodes, additionally provide coding extensibility and stability；(3) third portion is by Ffffff+Tttttt
Composition, on reflection section, certain is put or one section.The starting point length percent of the Ffffff section of being, the terminal length hundred of the Tttttt section of being
Proportion by subtraction, if it is equal to put then Ffffff and Tttttt numerical value.The relative position on section is weighed, no matter then by length percent
Section length, Ffffff+Tttttt changes between 0 to 100, it is ensured that coding unified and standard.One complete percentage ratio
The coding of section is as shown in figure 15.Haihe basin section path system (in figure, white point is the node of section) is as shown in figure 16.Sea
River valley section path system attribute list is as shown in table 7 below.
Table 7 Haihe basin section path system attribute list
Finally should be noted that: above example is only in order to illustrate that technical scheme is not intended to limit, to the greatest extent
The present invention has been described in detail by pipe with reference to above-described embodiment, and those of ordinary skill in the field still can be to this
Bright detailed description of the invention is modified or equivalent, these without departing from spirit and scope of the invention any amendment or
Equivalent, within the claims of the present invention all awaited the reply in application.
Claims (9)
1. the earth's surface hydrology database construction method being encoded to major key with percentage ratio section, it is characterised in that described method
Comprise the steps:
Step one, structure percentage ratio section coding；
Step 2, structure are encoded to the database structure of the earth's surface hydrographic data of major key with percentage ratio section；
Step 3, in numerical map, set up section path system with section, and data base is given in the path system of section.
2. earth's surface as claimed in claim 1 hydrology database construction method, it is characterised in that in described step one, described hundred
Proportion by subtraction section is encoded to the ID (identity number) card No. of surface water elementary cell section, and each section has uniqueness, by inquiry section
Coding i.e. can find this section and other relevant informations retrieving on section, and each section once assignment, not because of the network of rivers
Change and reset, described percentage ratio section coding be made up of 3 parts, be respectively as follows:
(1) part 1 is made up of B+SSS, and wherein B is 1 letter, represents basin；SSS is 6 bit digital, represents sub basin；
(2) part 2 is 6 bit digital Nnnnnn, the random digital code given of each section, a section one in expression tertiary area
Denier gives a numeral, then this numeral just becomes the unique of this section and permanent symbol together with tertiary area code, the most constant,
The uniqueness of section coding；
(3) third portion is made up of Ffffff+Tttttt, third portion reflect whole section, reflect certain point or section in one
Point；Ffffff is the starting point length percent in this section, and Tttttt is the terminal length percent in this section, if point
Then Ffffff and Tttttt numerical value is equal；If weighing the relative position on section by length percent, no matter then section length,
Ffffff+Tttttt all changes between 0 to 100.
3. earth's surface as claimed in claim 1 hydrology database construction method, it is characterised in that in described step 2, describedly
Table hydrographic data library structure includes: is encoded to major key with percentage ratio section and builds the tables of data of earth's surface hydrological data bank, described number
Form according to table effluent section path system attribute list and supporting table；
In point, line, surface and event 4 class object, main object is the section path system of section composition, i.e. dynamic segmentation model
In chain, including section and segmental arc；Described supporting table includes planar water body attribute list, point-like website attribute list and event table；Institute
State event table for an event table or line event table.
4. earth's surface as claimed in claim 1 hydrology database construction method, it is characterised in that described step 3 includes following step
Rapid:
<1>data prepare, and refine including coarse river digitized, the drafting of virtual streamline, Yi Jigen on planar water body
The flow direction of current is determined according to each streamflow data；
<2>section identifies and divides, and the principle that naturally crosses according to river divides and identifies section, and sets up section path system；
<3>generalization in river and rank determine；
<4>section path system is set up and WATERBODY figure layer, the interpolation of attribute information；
<5>quality control.
5. earth's surface as claimed in claim 4 hydrology database construction method, it is characterised in that in described step<1>, coarse
River digitized carry out refining refer to the segmental arc on coarse river bottom and node is modified or supplement；
The streamline of section path system is the path network system of the one-dimentional structure represented with wire, the water represented for planar
Body, artificial adds boost line to ensure the connection of streamline, the most virtual streamline of boost line at planar water body mid portion；Described void
The river line intending streamline and water system is put on an equal footing, and the condition code in attribute list arranges and distinguishes on the code of WATERBODY section；
The flow direction is the key character of water body, must reflect the direction of current and record at attribute library in the path system of section
In, there is FNODE and TNODE two to arrange respectively to record starting point node number and the terminal joint of section in the attribute library of section path system
Period, judges the upstream-downstream relationship of section by starting point node number and peripheral node number；Natural river is flowed to be clear and definite,
But the river big for lock control and canal artificial affecting is it should be understood that water flow data are judged.
6. earth's surface as claimed in claim 4 hydrology database construction method, it is characterised in that in described step<2>, river is certainly
The principle that so crosses includes:
The most same characterization rules: refer to the water body type that feature is single；For the water body that type is identical, even having different characteristic
Segment, it is possible to be defined as a section；For different types of water body, it is defined as different sections；
2. joint rule: refer to that a transport section is the water body that the segment type between current joint is consistent；Current are handed over
Meeting point includes river starting point and river mouth；
The bifurcated of current is treated as joint under this convention, it is adaptable in the case of current do not have bifurcated continuously；
3. branch line rule: be applicable to when flowing into and out planar water body auxiliary streamline, it is to avoid again draw in planar water body area
Divide current channel, node and bifurcation.
7. earth's surface as claimed in claim 4 hydrology database construction method, it is characterised in that in described step<3>, river level
Do not refer to the primary-slave relation of each current in the path system of digital code mark section, according to the definition rule of general identification code
It is that the stream order that numeral is the least is the highest；Identical and enter the river that position, master stream is different for rank, belong at section path system
Property table in increase field LEVELID, field be integer numeral, assignment is in the scope that stream order is identical.
8. earth's surface as claimed in claim 4 hydrology database construction method, it is characterised in that described step<4>includes following
Step:
A, the reading of start and end node number；
B, the calculating of section length, changed by coordinate projection and data association obtains；
C, the determination of river, place, section title；
D, the determination of place, section river pattern；
E, the determination of place, section stream order, artificial assignment and correction on the basis of the general fractional analysis in river；
F, the automatic identification of artificial streamline section.
9. earth's surface as claimed in claim 4 hydrology database construction method, it is characterised in that in described step<5>, quality control
System includes:
1) whether arbitrary section of whole section path system can downstream travel through, until entering Haihe River section or the definition of TFLAG value
It it is the section of 1；
2) whether arbitrary section of whole section path system can upstream travel through, until section, riverhead or the definition of SFLAG value
It it is the section of 1；
3) upstream travel through on this river between arbitrary LEVELID section or downstream travel through the most continuous, until it reaches
Section, high one-level other river；
Determine that above-mentioned three are checked by following four Basic examination function:
Function one: an optional section, finds out LEVELID same with this section, i.e. same river and be in this upstream, section
All sections；
Function two: an optional section, finds out LEVELID same with this section, i.e. same river and be in this downstream, section
All sections；
Function three: an optional section, finds out all sections being in this downstream, section in the path system of whole section；
Function four: an optional section, finds out all sections being in this upstream, section in the path system of whole section；
As the program checkout in aforementioned four function reports an error, then return step 3, check whether river streamline links up, section current
Flow to the most correct；As the program checkout in four functions is passed through, then the section water system traversing graph that will be formed；
As above-mentioned steps is all passed through, then the spatial topotaxy of Haihe basin section path system is set up work and is correctly completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610565531.4A CN106202479B (en) | 2016-07-18 | 2016-07-18 | A kind of earth's surface hydrology database construction method being encoded to major key with percentage section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610565531.4A CN106202479B (en) | 2016-07-18 | 2016-07-18 | A kind of earth's surface hydrology database construction method being encoded to major key with percentage section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106202479A true CN106202479A (en) | 2016-12-07 |
| CN106202479B CN106202479B (en) | 2019-06-18 |
Family
ID=57493865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610565531.4A Active CN106202479B (en) | 2016-07-18 | 2016-07-18 | A kind of earth's surface hydrology database construction method being encoded to major key with percentage section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106202479B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106781710A (en) * | 2016-12-27 | 2017-05-31 | 袁梦恬 | A kind of English study words and phrases remember out of order generating means |
| CN107784081A (en) * | 2017-09-28 | 2018-03-09 | 中国地质大学（武汉） | Method, equipment and the storage device that a kind of basin figure intelligently generates |
| CN113204551A (en) * | 2021-04-30 | 2021-08-03 | 上海川河水利规划设计有限公司 | River bank protection design method, system, intelligent terminal and storage medium |
| CN113779041A (en) * | 2021-09-29 | 2021-12-10 | 中国水利水电科学研究院 | Small stream domain dividing and coding method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101763657A (en) * | 2008-10-10 | 2010-06-30 | 新奥特（北京）视频技术有限公司 | Three-dimensional terrain display method for video production |
| CN103400030A (en) * | 2013-07-24 | 2013-11-20 | 环境保护部环境规划院 | System for assessing human health risks caused by groundwater pollution |
| CN104298689A (en) * | 2013-07-17 | 2015-01-21 | 杭州贵仁科技有限公司 | Drainage network encoding method and system |
-
2016
- 2016-07-18 CN CN201610565531.4A patent/CN106202479B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101763657A (en) * | 2008-10-10 | 2010-06-30 | 新奥特（北京）视频技术有限公司 | Three-dimensional terrain display method for video production |
| CN104298689A (en) * | 2013-07-17 | 2015-01-21 | 杭州贵仁科技有限公司 | Drainage network encoding method and system |
| CN103400030A (en) * | 2013-07-24 | 2013-11-20 | 环境保护部环境规划院 | System for assessing human health risks caused by groundwater pollution |
Non-Patent Citations (2)
| Title |
|---|
| 余向勇 等: "海河流域河段编码开发及应用研究", 《中国环境科学学会学术年会优秀论文集（2007）》 * |
| 王敏嫱: "基于DEM的水文要素提取及水文拓扑结构建立的研究——以延河流域为例", 《中国优秀硕士学位论文全文数据库 基础科学辑》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106781710A (en) * | 2016-12-27 | 2017-05-31 | 袁梦恬 | A kind of English study words and phrases remember out of order generating means |
| CN107784081A (en) * | 2017-09-28 | 2018-03-09 | 中国地质大学（武汉） | Method, equipment and the storage device that a kind of basin figure intelligently generates |
| CN113204551A (en) * | 2021-04-30 | 2021-08-03 | 上海川河水利规划设计有限公司 | River bank protection design method, system, intelligent terminal and storage medium |
| CN113204551B (en) * | 2021-04-30 | 2024-02-06 | 上海川河水利规划设计有限公司 | River levee revetment design method, system, intelligent terminal and storage medium |
| CN113779041A (en) * | 2021-09-29 | 2021-12-10 | 中国水利水电科学研究院 | Small stream domain dividing and coding method |
| CN113779041B (en) * | 2021-09-29 | 2023-09-08 | 中国水利水电科学研究院 | Small drainage basin dividing and encoding method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106202479B (en) | 2019-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Verdin et al. | A topological system for delineation and codification of the Earth’s river basins | |
| CN105117573B (en) | Auto hydraulic model building method based on CAD drainage pipeline networks drawing informations | |
| CN106710437A (en) | Compilation method and system for electronic map | |
| CN103236086A (en) | Multiscale DEM (Digital Elevation Model) modeling method giving consideration to contents of surface hydrology | |
| Li et al. | Quantitative analysis of the ecological security pattern for regional sustainable development: case study of Chaohu Basin in Eastern China | |
| CN105138722A (en) | Digital river-lake network based method for dividing water collection unit of river basin of plain river network region | |
| CN106202479A (en) | A kind of earth's surface hydrology database construction method being encoded to major key with percentage ratio section | |
| CN105224747A (en) | Based on the urban waterlogging model building method of CAD engineering drawing information and design of pipe networks reckoner | |
| CN101924647A (en) | Local area topology rebuilding method for updating navigation road network increment | |
| CN108053458A (en) | A kind of watershed generalization figure based on GIS-Geographic Information System makes and methods of exhibiting | |
| Fan et al. | Origin, spatial pattern, and evolution of urban system: Testing a hypothesis of “urban tree” | |
| Chen | Land-use suitability analysis for urban development in Regional Victoria: A case study of Bendigo | |
| CN117668328A (en) | High-definition DEM-based water system space map visualization method | |
| Li et al. | Reconstruction of traditional village spatial texture based on parametric analysis | |
| Huang et al. | Spatio-temporal evolution and distribution of cultural heritage sites along the Suzhou canal of China | |
| CN113312736B (en) | River network hydrodynamic simulation implementation method and system based on cloud platform | |
| CN112288611A (en) | Planning method for activation of historical building community based on regional culture joy | |
| Gong et al. | [Retracted] Application of Computer 3D Modeling Technology in Modern Garden Ecological Landscape Simulation Design | |
| KR101063827B1 (en) | Semi-automated Conjugated Point Pair Extraction Method for Transformation of Geometric Maps between Continuous and Digital Topographic Maps | |
| Ghosh et al. | Fractal generation of artificial sewer networks for hydrologic simulations | |
| Lee | Geographic and cartographic contexts in generalization | |
| CN109145044A (en) | One kind being based on many body system Fundamental Geographic Information Data benchmark model | |
| CN107423520A (en) | Based on CAD secondary development rapid extraction pipeline information SWMM modeling methods | |
| Kaoje | Application of Geographical Information System Techniques in Urban Flood Risk Assessment and Vulnerability Mapping. A Case Study of Cardiff, Wales | |
| Vogler et al. | Ditch Urbanism: Water Infrastructure in the Middle Rio Grande Valley |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |