CN107766664A - Determination method, apparatus and equipment for the row of filling with reference to the irrigation level of channel - Google Patents
Determination method, apparatus and equipment for the row of filling with reference to the irrigation level of channel Download PDFInfo
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Abstract
The determination method, apparatus and equipment, the method for determination that the irrigation level of channel is combined the present invention is provided to the row of filling comprise the following steps：Collect the geographic data in irrigated area；Geographic model is established, geographic model is used to reflect that ground includes ground dispersed elevation m1 and bleeder elevation m2 than drop and elevation m, elevation m；Reference point is chosen on geographic model according to geographic data, elevation corresponding to reference point is with reference to point height m3；Branch canal irrigation level h is determined according to ground dispersed elevation m1, bleeder elevation m2 and with reference to point height m3；Trunk canal irrigation level is selected so that the irrigation level of each bleeder in trunk canal is not less than branch canal irrigation level h.Determination method for the row of filling with reference to the irrigation level of channel according to embodiments of the present invention, selects branch canal irrigation level and trunk canal irrigation level, makes irrigated area investment and running cost minimum, and secondary water lift lift is small, and field running cost is low.
Description
Technical field
The present invention relates to the irrigation in farmland and discharge, and in particular to the determination side for the row of filling with reference to the irrigation level of channel
Method, device and equipment.
Background technology
The row of filling combines channel, and because engineering has, permanent and floor space is smaller, and engineering expropriation of land immigration allocation population is few,
Head works running cost peasant household of being benefited shares small, and peasant household is acceptant.Tradition fill row with reference to channel water level determine method design and
All it is " being filled with being ranked " when calculating irrigation level, i.e., irrigation level is not higher than design discharge level.Because irrigation level is low, water lift
Lift is small, so head works running cost is benefited, peasant household shares small, but the secondary water lift lift of peasant household is big, and field running cost is high, causes to fill
Area's overall operational cost is higher.
The content of the invention
In view of this, the determination method, apparatus and equipment of the irrigation level of channel, energy are combined the present invention is provided to the row of filling
Optimal irrigation level is enough chosen, it is easy to implement, reduce cost.
In order to solve the above technical problems, on the one hand, the present invention provides a kind of row of filling that is used for reference to the irrigation level of channel
Method is determined, including：
S1：The geographic data in irrigated area is obtained,
The geographic data in irrigated area is collected, the geographic data includes landform, water supply position and ground line gradient；
S2：Establish geographic model,
Geographic model is established according to the geographic data, the geographic model is used to reflect ground than drop and elevation m, described
Elevation m includes ground dispersed elevation m1 and bleeder elevation m2；
S3：Select reference point,
Reference point is chosen on the geographic model according to the geographic data, elevation corresponding to the reference point is reference
Point height m3；
S4：Branch canal irrigation level is selected,
The branch is determined according to the ground dispersed elevation m1, the bleeder elevation m2 and the point height m3 that refers to
Canal irrigation level h；
S5：Trunk canal irrigation level is selected,
Trunk canal irrigation level is selected so that the irrigation level of each bleeder in trunk canal is not less than the branch canal irrigation level
h。
According to some embodiments of the present invention, step S4 includes：
S41, using the reference point height m3 as the branch canal irrigation level；
S42, it is more described with reference to the point height m3 and ground dispersed elevation m1, the elevation of the bleeder elevation m2
Difference,
When the depth displacement with reference to the point height m3 and ground dispersed elevation m1, bleeder elevation m2 exceedes predetermined model
When enclosing, reference point, repeat step S3 and step S41 are reselected, until the reference point height m3 and the ground mean height
Journey m1, bleeder elevation m2 depth displacement are in preset range.
According to some embodiments of the present invention, in step S42 so that the branch canal irrigation level h is with the branch canal
Depth displacement between the dispersed elevation m1 of face is between 0.3-0.6m.
According to some embodiments of the present invention, the branch canal irrigation level h is caused to divide water with the branch canal in step S42
Depth displacement between mouth elevation m2 is between 0.3-0.6m.
According to some embodiments of the present invention, also include sub-step S43 in step s 4：Adjustment ratio drop step,
Adjust the ratio drop between the branch canal irrigation level h and the ground dispersed elevation m1 and the bleeder elevation m2
To cause the ratio between the branch canal irrigation level h and the ground dispersed elevation m1 and the bleeder elevation m2 to drop in pre-
Determine in scope.
According to some embodiments of the present invention, the branch canal irrigation level h and the ground dispersed elevation m1 and described point
Ratio drop and ground between the elevation m2 of the mouth of a river is more consistent than dropping.
According to the irrigation level rank of some embodiments of the present invention, the in step s 5 adjacent bleeder in the trunk canal
Connect to demote by ground ratio and connect.
Check gate is provided with according to some embodiments of the present invention, at the bleeder in the trunk canal to make the bleeder
Irrigation level is raised.
Second aspect, the embodiment of the present invention provide a kind of determining device for being used for the row of filling and combining the irrigation level of channel, bag
Include：
Acquisition module, it is used for the geographic data for collecting irrigated area, and the geographic data includes landform, water supply position and ground
The gradient；
Model building module, it establishes geographic model according to the geographic data, and the geographic model is used to reflect ground
Include ground dispersed elevation m1 and bleeder elevation m2 than drop and elevation m, the elevation m；
With reference to point selection module, it is used to choose reference point on the geographic model according to the geographic data, described
Elevation corresponding to reference point is with reference to point height m3；
Branch canal irrigation level selecting module, it is used for according to the ground dispersed elevation m1, bleeder elevation m2 and institute
State and determine branch canal irrigation level h with reference to point height m3；
Trunk canal irrigation level selecting module, it is used to select trunk canal irrigation level so that the irrigation of each bleeder in trunk canal
Water level is not less than branch canal irrigation level h.
The third aspect, the embodiment of the present invention provide a kind of electronic equipment for being used to determine irrigation level, including：Processor；
And memory, computer program instructions are stored with the memory,
Wherein, when the computer program instructions are run by the processor so that the computing device such as right
It is required that the step being used in the determination method for the irrigation level that the row of filling combines channel described in 1 to 8 any one.
Fourth aspect, the embodiment of the present invention provide a kind of computer-readable recording medium, the computer-readable storage medium
Matter is stored with computer program, when the computer program is run by processor so that any of the above-described reality of computing device
Apply the step being used in the determination method for the irrigation level that the row of filling combines channel of example.
The above-mentioned technical proposal of the present invention one of at least has the advantages that：
A kind of determination method for being used for the row of filling and combining the irrigation level of channel according to embodiments of the present invention, according to irrigated area
Geographic data establish geographic model, select reference point on geographic model, and according to reference point determine branch canal irrigation level and
Trunk canal irrigation level, irrigated area cost of investment and operating cost are not only reduced, and secondary water lift lift is small, and it is easy to real
Apply.
Brief description of the drawings
Fig. 1 is the flow chart for being used for filling and arranging the determination method for the irrigation level for combining channel of the embodiment of the present invention；
Fig. 2 is the flow for the row of filling with reference to the step S4 of the determination method of the irrigation level of channel of the embodiment of the present invention
Figure；
Fig. 3 is the schematic diagram for being used for filling and arranging the determining device for the irrigation level for combining channel of the embodiment of the present invention；
Fig. 4 is the schematic diagram for being used to determine the electronic equipment of irrigation level of the embodiment of the present invention.
Reference：
Determining device 1000 for the row of filling with reference to the irrigation level of channel；
Acquisition module 1001；Model building module 1002；With reference to point selection module 1003；Branch canal irrigation level selecting module
1004；Trunk canal irrigation level selecting module 1005；
For determining the electronic equipment 1400 of irrigation level；
Processor 1401；Memory 1402；Network interface 1403；Input equipment 1404；Hard disk 1405；Display device
1406；Operating system 14021；Application program 14014.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme of the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is this hair
Bright part of the embodiment, rather than whole embodiments.Based on described embodiments of the invention, ordinary skill
The every other embodiment that personnel are obtained, belongs to the scope of protection of the invention.
Below in conjunction with drawings and examples, the embodiment of the present invention is described in further detail.Following reality
Apply example to be used to illustrate the present invention, but be not limited to the scope of the present invention.
As shown in figure 1, the determination method for being used for the row of filling and combining the irrigation level of channel of the embodiment of the present invention, including：
Step S1, the geographic data in irrigated area is obtained.
The geographic data in irrigated area is collected, the geographic data includes landform, water supply position and ground line gradient.
Step S2, geographic model is established.
Geographic model is established according to the geographic data, the geographic model is used to reflect ground than drop and elevation m, described
Elevation m includes ground dispersed elevation m1 and bleeder elevation m2.
Step S3, reference point is selected.
Reference point is chosen on the geographic model according to the geographic data, elevation corresponding to the reference point is reference
Point height m3.
Step S4, branch canal irrigation level is selected.
The branch canal irrigation is determined according to the ground dispersed elevation m1, bleeder elevation m2 and the point height m3 that refers to
Irrigate water level h.
Branch canal irrigation level h is determined according to reference point, not only reduces irrigated area cost of investment and operating cost, Er Qiebian
In implementation.
As shown in Fig. 2 in certain specific embodiments of the invention, step S4 includes：
S41, using the reference point height m3 as the branch canal irrigation level；
S42, it is more described with reference to point height m3 and the ground dispersed elevation m1, bleeder elevation m2 depth displacement,
When the depth displacement with reference to the point height m3 and ground dispersed elevation m1, bleeder elevation m2 exceedes predetermined model
When enclosing, reference point, repeat step S3 and step S41 are reselected, until the reference point height m3 and the ground mean height
Journey m1, bleeder elevation m2 depth displacement are in preset range.
In step S42 so that the depth displacement between the branch canal irrigation level h and the branch canal ground dispersed elevation m1
Between 0.3-0.6m, for example, the preset range can be set as into 0.5m.
In step S42 the depth displacement between the branch canal irrigation level h and the branch canal bleeder elevation m2 is existed
Between 0.3-0.6m, for example, the preset range can be set as into 0.5m.
According to one embodiment of present invention, sub-step S43 is also included in step s 4：Adjustment ratio drop step,
Adjust the ratio drop between the branch canal irrigation level h and the ground dispersed elevation m1 and the bleeder elevation m2
To cause the ratio between the branch canal irrigation level h and the ground dispersed elevation m1 and the bleeder elevation m2 to drop in pre-
Determine in scope, such as so that between the branch canal irrigation level h and ground dispersed elevation m1 and the bleeder elevation m2
Ratio drop with ground than drop it is consistent.
According to step S41, step S42 and step S43, the result that can be optimized the branch canal irrigation level h,
Not only make secondary water lift lift small and easy to implement.
Step S5, trunk canal irrigation level is selected.
Trunk canal irrigation level is selected so that the irrigation level of each bleeder in trunk canal is not less than the branch canal irrigation level
h。
According to one embodiment of present invention, the irrigation level of the adjacent bleeder in the trunk canal is held in the mouth in step s 5
Connect to demote by ground ratio and connect.
Further, check gate is provided with the bleeder in the trunk canal raise the irrigation level of the bleeder.
Next, the determining device for being used for filling and arranging the irrigation level with reference to channel that description is according to embodiments of the present invention.
As shown in figure 3, the embodiment of the present invention is used for determining device 1000 of the row of filling with reference to the irrigation level of channel, bag
Include：
Acquisition module 1001, it is used for the geographic data for collecting irrigated area, the geographic data include landform, water supply position and
Ground line gradient；
Model building module 1002, it establishes geographic model according to the geographic data, and the geographic model is used to reflect
Ground includes ground dispersed elevation m1 and bleeder elevation m2 than drop and elevation m, the elevation m；
With reference to point selection module 1003, it is used to choose reference point on the geographic model according to the geographic data,
Elevation corresponding to the reference point is with reference to point height m3；
Branch canal irrigation level selecting module 1004, its be used for according to the ground dispersed elevation m1, bleeder elevation m2 with
And the point height m3 that refers to determines branch canal irrigation level h；
Trunk canal irrigation level selecting module 1005, it is used to select trunk canal irrigation level so that each bleeder in trunk canal
Irrigation level is not less than branch canal irrigation level h.
As shown in figure 4, the embodiments of the invention provide a kind of electronic equipment 1400 for being used to determine irrigation level, including：
Processor 1401 and memory 1402, computer program instructions are stored with the memory 1402, wherein, in the calculating
When machine programmed instruction is run by the processor so that the processor 1401 performs following steps：
The step being used in the determination method for the irrigation level that the row of filling combines channel in the embodiment of the present invention.
Further, as shown in figure 4, electronic equipment also include network interface 1403, input equipment 1404, hard disk 1405,
With display device 1406.
It can be interconnected between above-mentioned each interface and equipment by bus architecture.Bus architecture can be included arbitrarily
The bus and bridge of the interconnection of quantity.One or more central processing unit (CPU) specifically represented by processor 1401, Yi Jiyou
The various of one or more memory that memory 1402 represents are electrically connected to together.Bus architecture can also will be such as outer
The various other of peripheral equipment, voltage-stablizer and management circuit or the like are electrically connected to together.It is appreciated that bus architecture is used
Connection communication between these components are realized.Bus architecture is in addition to including data/address bus, in addition to power bus, control are always
Line and status signal bus in addition, these are all it is known in the art, being therefore no longer described in greater detail herein.
The network interface 1403, network (such as internet, LAN) can be connected to, dependency number is obtained from network
According to, and can be stored in hard disk 1405.
The input equipment 1404, can receive operating personnel input various instructions, and be sent to processor 1401 with
For performing.The input equipment 1404 can include keyboard or pointing device (for example, mouse, trace ball (trackball),
Touch-sensitive plate or touch-screen etc..
The display device 1406, the result that the execute instruction of processor 1401 obtains can be shown.
The memory 1402, program and data necessary to being run for storage program area, and processor 1401
The data such as the intermediate result in calculating process.
It is appreciated that the memory 1402 in the embodiment of the present invention can be volatile memory or non-volatile memories
Device, or may include both volatibility and nonvolatile memory.Wherein, nonvolatile memory can be read-only storage
(ROM), programmable read only memory (PROM), Erasable Programmable Read Only Memory EPROM (EPROM), electrically erasable are read-only
Memory (EEPROM) or flash memory.Volatile memory can be random access memory (RAM), and it is used as outside slow at a high speed
Deposit.The memory 1402 of apparatus and method described herein is intended to depositing for including but not limited to these and any other suitable type
Reservoir.
In some embodiments, memory 1402 stores following element, can perform module or data structure, or
Their subset of person, or their superset：Operating system 14021 and application program 14014.
Wherein, operating system 14021, comprising various system programs, such as ccf layer, core library layer, driving layer etc., it is used for
Realize various basic businesses and the hardware based task of processing.Application program 14014, comprising various application programs, for example (,) it is clear
Device (Browser) etc. is look at, for realizing various applied business.Realize that the program of present invention method may be embodied in application
In program 14014.
Above-mentioned processor 1401, when calling and perform the application program and data that are stored in the memory 1402, tool
Body, when can be the program or instruction that are stored in application program 14014, obtain panoramic picture；The panoramic picture is carried out
Pretreatment, obtains pending subgraph；The pending subgraph is input in multipath convolutional neural networks, described in acquisition
The further feature figure of pending subgraph；Pond processing is carried out to the further feature figure；By the deep layer after pondization processing
Characteristic pattern is input in full link model, using the output of the full link model as the positional information after reorientation.
The method that the above embodiment of the present invention discloses can apply in processor 1401, or real by processor 1401
It is existing.Processor 1401 is probably a kind of IC chip, has the disposal ability of signal.In implementation process, the above method
Each step can be completed by the instruction of the integrated logic circuit of the hardware in processor 1401 or software form.Above-mentioned
Processor 1401 can be general processor, digital signal processor (DSP), application specific integrated circuit (ASIC), ready-made programmable
Gate array (FPGA) either other PLDs, discrete gate or transistor logic, discrete hardware components, can be with
Realize or perform disclosed each method, step and the logic diagram in the embodiment of the present invention.General processor can be micro- place
It can also be any conventional processor etc. to manage device or the processor.The step of method with reference to disclosed in the embodiment of the present invention
Hardware decoding processor can be embodied directly in and perform completion, or held with the hardware in decoding processor and software module combination
Row is completed.Software module can be located at random access memory, flash memory, read-only storage, programmable read only memory or electrically erasable
Write in the ripe storage medium in this areas such as programmable storage, register.The storage medium is located at memory 1402, processor
1401 read the information in memory 1402, with reference to the step of its hardware completion above method.
It is understood that embodiments described herein can use hardware, software, firmware, middleware, microcode or its
Combine to realize.Realized for hardware, processing unit can be realized in one or more application specific integrated circuits (ASIC), numeral letter
Number processor DSP), digital signal processing appts (DSPD), programmable logic device (PLD), field programmable gate array
(FPGA), general processor, controller, microcontroller, microprocessor, other electronics lists for performing herein described function
In member or its combination.
Realize, can be realized herein by performing the module (such as process, function etc.) of function described herein for software
Described technology.Software code is storable in memory and passes through computing device.Memory can within a processor or
Realized outside processor.
Specifically, processor 1401 is additionally operable to read the computer program, performs the described of any of the above-described embodiment
The step in the determination method of the irrigation level of channel is combined for the row of filling.
In addition, the embodiment of the present invention additionally provides a kind of computer-readable recording medium, the computer-readable storage medium
Matter is stored with computer program, when the computer program is run by processor so that any of the above-described reality of computing device
Apply the described step being used in the determination method for the irrigation level that the row of filling combines channel of example.
In several embodiments provided herein, it should be understood that disclosed method and apparatus, can be by other
Mode realize.For example, device embodiment described above is only schematical, for example, the division of the unit, only
For a kind of division of logic function, there can be other dividing mode when actually realizing, such as multiple units or component can combine
Or another system is desirably integrated into, or some features can be ignored, or do not perform.Another, shown or discussed phase
Coupling or direct-coupling or communication connection between mutually can be by some interfaces, the INDIRECT COUPLING or communication of device or unit
Connection, can be electrical, mechanical or other forms.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That the independent physics of unit includes, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, can also be realized in the form of hardware adds SFU software functional unit.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in one and computer-readable deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are causing a computer
Equipment (can be personal computer, server, or network equipment etc.) performs receiving/transmission method described in each embodiment of the present invention
Part steps.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (Read-Only Memory, abbreviation
ROM), random access memory (Random Access Memory, abbreviation RAM), magnetic disc or CD etc. are various to store
The medium of program code.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (11)
1. a kind of be used for determination method of the row of filling with reference to the irrigation level of channel, it is characterised in that comprises the following steps：
S1：The geographic data in irrigated area is obtained,
The geographic data in irrigated area is collected, the geographic data includes landform, water supply position and ground line gradient；
S2：Establish geographic model,
Geographic model is established according to the geographic data, the geographic model is used to reflect ground than drop and elevation m, the elevation
M includes ground dispersed elevation m1 and bleeder elevation m2；
S3：Select reference point,
Reference point is chosen on the geographic model according to the geographic data, elevation corresponding to the reference point is that reference point is high
Journey m3；
S4：Branch canal irrigation level is selected,
The branch canal irrigation water is determined according to the ground dispersed elevation m1, bleeder elevation m2 and the point height m3 that refers to
Position h；
S5：Trunk canal irrigation level is selected,
Trunk canal irrigation level is selected so that the irrigation level of each bleeder in trunk canal is not less than the branch canal irrigation level h.
2. determination method according to claim 1, it is characterised in that step S4 includes：
S41, using the reference point height m3 as the branch canal irrigation level；
S42, it is more described with reference to point height m3 and the ground dispersed elevation m1, bleeder elevation m2 depth displacement,
When the depth displacement with reference to the point height m3 and ground dispersed elevation m1, bleeder elevation m2 exceedes preset range
When, reference point, repeat step S3 and step S41 are reselected, until the reference point height m3 and the ground dispersed elevation
M1, the depth displacement of the bleeder elevation m2 are in preset range.
3. determination method according to claim 2, it is characterised in that in step S42 so that the branch canal irrigation level
Depth displacement between h and the branch canal ground dispersed elevation m1 is between 0.3-0.6m.
4. determination method according to claim 2, it is characterised in that cause the branch canal irrigation level h in step S42
Depth displacement between the branch canal bleeder elevation m2 is between 0.3-0.6m.
5. determination method according to claim 2, it is characterised in that also include sub-step S43 in step s 4：Adjustment ratio
Step drops,
Adjust ratio between the branch canal irrigation level h and the ground dispersed elevation m1 and the bleeder elevation m2 drop so that
Obtain the drop of the ratio between the branch canal irrigation level h and ground dispersed elevation m1 and the bleeder elevation m2 and be in predetermined model
In enclosing.
6. determination method according to claim 5, it is characterised in that the branch canal irrigation level h is averaged with the ground
Ratio drop between elevation m1 and the bleeder elevation m2 drops consistent with ground ratio.
7. determination method according to claim 1, it is characterised in that the adjacent of the trunk canal in step s 5 described divides water
The irrigation level linking of mouth is demoted by ground ratio to be connect.
8. determination method according to claim 7, it is characterised in that at the bleeder in the trunk canal be provided with check gate to
Raise the irrigation level of the bleeder.
9. a kind of be used for determining device of the row of filling with reference to the irrigation level of channel, it is characterised in that including：
Acquisition module, it is used for the geographic data for collecting irrigated area, and the geographic data includes landform, water supply position and ground slope
Degree；
Model building module, it establishes geographic model according to the geographic data, and the geographic model is used to reflect ground than drop
Include ground dispersed elevation m1 and bleeder elevation m2 with elevation m, the elevation m；
With reference to point selection module, it is used to choose reference point, the reference on the geographic model according to the geographic data
Elevation corresponding to point is with reference to point height m3；
Branch canal irrigation level selecting module, it is used for according to the ground dispersed elevation m1, the bleeder elevation m2 and institute
State and determine branch canal irrigation level h with reference to point height m3；
Trunk canal irrigation level selecting module, it is used to select trunk canal irrigation level so that the irrigation level of each bleeder in trunk canal
Not less than branch canal irrigation level h.
A kind of 10. electronic equipment for being used to determine irrigation level, it is characterised in that including:
Processor；And memory, computer program instructions are stored with the memory,
Wherein, when the computer program instructions are run by the processor so that the computing device such as claim 1
To the step being used in the determination method for the irrigation level that the row of filling combines channel described in 8 any one.
11. a kind of computer-readable recording medium, it is characterised in that the computer-readable recording medium storage has computer journey
Sequence, when the computer program is run by processor so that the computing device is as described in any one of claim 1 to 8
The step in the determination method of the irrigation level of channel is combined for the row of filling.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711017376.3A CN107766664B (en) | 2017-10-26 | 2017-10-26 | Method, device and equipment for determining irrigation water level of irrigation and drainage combined channel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711017376.3A CN107766664B (en) | 2017-10-26 | 2017-10-26 | Method, device and equipment for determining irrigation water level of irrigation and drainage combined channel |
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| CN107766664B CN107766664B (en) | 2020-11-24 |
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| US20080205987A1 (en) * | 2007-02-27 | 2008-08-28 | Brian Scott Furrer | Method and apparatus for controlling drainage and irrigation of fields |
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| CN106295041A (en) * | 2016-08-18 | 2017-01-04 | 淮安市水利勘测设计研究院有限公司 | River system network drawing drawing method in regional water conservancy planning |
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| US20080205987A1 (en) * | 2007-02-27 | 2008-08-28 | Brian Scott Furrer | Method and apparatus for controlling drainage and irrigation of fields |
| CN105464061A (en) * | 2015-12-04 | 2016-04-06 | 陕西省土地工程建设集团有限责任公司 | Catchwater construction method utilizing unpowered soil flow |
| CN106295041A (en) * | 2016-08-18 | 2017-01-04 | 淮安市水利勘测设计研究院有限公司 | River system network drawing drawing method in regional water conservancy planning |
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