CN112685526A - WebGIS-based dike-free river channel right-determining demarcation implementation method, server and client - Google Patents
WebGIS-based dike-free river channel right-determining demarcation implementation method, server and client Download PDFInfo
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Abstract
The invention discloses a WebGIS (Web geographic information System) -based method, a server and a client for realizing the watercourse wayward-free delimiting, belonging to the technical field of watercourse delimiting, wherein the method comprises the following steps: firstly, obtaining river channel cross section information based on drawn GIS map elements; secondly, calculating a river water surface curve according to the river cross section information; secondly, determining the right of the river channel to demarcate according to the calculated river channel water surface curve and the utilization conditions of the land nearby the river channel water surface curve; and finally, setting boundary pile points according to the riverway right-determining demarcation result. The method combines the advantages of Web in information sharing and GIS in the aspect of spatial data processing, solves the problems of long time consumption, huge cost, low drawing precision caused by drawing errors, low information sharing efficiency among multiple departments and the like in the conventional method in the dike-free river channel right-determining demarcation work, and can better assist decision makers to scientifically carry out the related work of river channel right-determining demarcation, so that the existing water resources are reasonably utilized to the maximum extent, and the method has practical social requirements and wide popularization and application values.
Description
Technical Field
The invention belongs to the technical field of riverway right-confirming demarcation, and particularly relates to a WebGIS (Web geographic information System) -based method, a server and a client for realizing the riverway right-confirming demarcation without an embankment.
Background
Water is the source of life and growth on which humans and everything depend. The river course is used as an important carrier of water, and the importance of the river course is self-evident. With the rapid development of economy and the rapid improvement of productivity, the development of riverways is increasingly strengthened by people, and the flood control pressure of the riverways is increased due to the fact that part of the riverways are seriously invaded. Meanwhile, the problems of river pollution, unreasonable sand collection around the river, no river flood area division and the like exist. In order to solve the problems, the right of the river channel is bound, early-stage preparation is made for river channel regulation work, and basic guarantee is provided for river channel comprehensive regulation. Therefore, it is very important to perform scientific, reasonable and efficient river channel right-determining demarcation work.
The traditional field measurement method for performing the dike-free river channel right delimiting work has the problems of long time consumption, huge cost, low drawing precision caused by drawing errors, low information sharing efficiency among multiple departments and the like.
Disclosure of Invention
Aiming at the defects or the improvement requirements, the invention provides a method for realizing the watercourse without dike right demarcation based on the WebGIS, a server and a client, and aims to solve the problems of long time consumption, high cost, low drawing precision and low information sharing efficiency among multiple departments in the traditional method.
In order to achieve the above object, in one aspect, the present invention provides a method for implementing a WebGIS-based dike-free river channel right-determining demarcation, including:
(1) obtaining river channel cross section information based on the drawn GIS map elements;
(2) calculating flood levels of all cross sections of the river according to the cross section information of the river, the diffusion coefficient and the roughness of the river and the flood level of the first cross section;
(3) determining the intersection point of each cross section flood level and the left and right shorelines thereof, and respectively and sequentially connecting the intersection points of each cross section flood level and the left and right shorelines thereof to obtain a river surface curve;
(4) setting different riverway right-confirming demarcation buffer zones based on the riverway water surface curve;
(5) and setting boundary pile points according to the riverway right-defining demarcating buffer area, thereby realizing the right-defining demarcating of the riverway without the dike.
Preferably, the step (1) specifically comprises the following steps:
(1.1) drawing GIS map elements by using ArcMap and ArcScene, wherein the GIS map elements comprise an administrative region map, a land use type map, a DEM (dynamic elevation model) map and a river channel cross-sectional map;
(1.2) loading the GIS map elements into mxd map documents, and performing symbolic rendering on each map element;
(1.3) releasing the mxd map document to an ArcGIS Server on a Server, designating a service type during release, and simultaneously pushing a GIS map to multiple users of a client through Web data service so that the users obtain cross section information of the river channel at the client.
Preferably, the step (2) specifically comprises the following steps:
(2.1) setting the diffusion coefficient and the roughness of the river channel and the flood level of the first cross section according to the cross section information of the river channel;
(2.2) by Bernoulli equation
Calculating flood levels of all cross sections in sequence from the first cross section;
wherein the on-way head loss hfComprises the following steps:
local head loss hεComprises the following steps:
average velocity of flow V across the cross-sectionuComprises the following steps:
lower cross section average flow velocity VLComprises the following steps:
upper cross section KuComprises the following steps:
lower cross section KLComprises the following steps:
in the formula, Zu、ZL-flood level (m) of upper and lower cross-section; vu、VL-average flow velocity (m/s) of the upper and lower cross sections; qu、QLFlow (m) of the upper and lower cross-sections3/s)；Au、ALCross-sectional area of water (m) of upper and lower cross-sections2) (ii) a S represents the space (m) between the upper and lower cross sections; n isu、nL-roughness of the upper and lower cross-sections; ru、RL-hydraulic radius (m) of the upper and lower cross-sections; epsilon-diffusion coefficient; g-acceleration of gravity (m/s)2)。
Preferably, the step (3) specifically comprises the following steps:
(3.1) determining intersection points of the flood level of each cross section and the left and right shorelines of the cross section;
and (3.2) sequentially connecting the intersection points of the flood level of each cross section and the left shoreline of the cross section, and sequentially connecting the intersection points of the flood level of each cross section and the right shoreline of the cross section to obtain a river surface curve.
Preferably, the step (4) specifically includes the following steps:
(4.1) the server loads the calculated river water surface curve on a client GIS map through Web data service;
(4.2) the region between the river surface curves displayed by the client is the initial result of the non-levee river channel right-determining demarcation;
and (4.3) setting different riverway right-confirming demarcation buffer areas by combining the land utilization conditions near the riverway water surface curve, and determining the final result of riverway right-confirming demarcation.
Preferably, the step (5) specifically comprises the following steps:
(5.1) delimiting a buffer area at the client according to the river channel right, and drawing the boundary stake points;
and (5.2) marking the serial number, the name, the longitude and latitude coordinates and the information of the right person of the stake point at the client side, and realizing the display and the derivation of the stake point result of the boundary.
In another aspect, the present invention provides a server, including:
the first pushing module is used for pushing GIS map elements to the client so that a user can obtain river channel cross section information at the client;
the receiving module is used for receiving corresponding parameters set by the client according to the information of the cross section of the river channel, wherein the corresponding parameters comprise the diffusion coefficient, the roughness and the flood level of the first cross section of the river channel;
the calculation module is used for calculating the flood level of each cross section of the river channel according to the cross section information of the river channel and the corresponding parameters;
the drawing module is used for determining the intersection point of each cross section flood level and the left and right shorelines thereof, and respectively and sequentially connecting the intersection points of each cross section flood level and the left and right shorelines thereof to obtain a river surface curve;
and the second pushing module is used for pushing the river surface curve to the client so as to enable the client to set different river channel right-confirming demarcation buffer areas based on the river surface curve, and set a demarcation pile point according to the river channel right-confirming demarcation buffer area, so that the right demarcation of the riverway without the dike is realized.
In another aspect, the present invention provides a client, including:
the first receiving module is used for receiving GIS map elements pushed by the server and acquiring cross section information of a river channel;
the setting module is used for setting corresponding parameters according to the information of the cross section of the river channel, wherein the corresponding parameters comprise the diffusion coefficient, the roughness and the flood level of the first cross section of the river channel;
the pushing module is used for sending the corresponding parameters to the server so that the server calculates the flood level of each cross section of the river according to the cross section information of the river and the corresponding parameters, determines the intersection point of each cross section flood level and the left and right shorelines of the cross section flood level, and sequentially connects the intersection points of each cross section flood level and the left and right shorelines of the cross section flood level to obtain a river surface curve;
the second receiving module is used for receiving the river surface curve pushed by the server and setting different river channel right-defining delimiting buffer zones; and setting boundary pile points according to the riverway right-defining demarcating buffer area, thereby realizing the right-defining demarcating of the riverway without the dike.
In general, compared with the prior art, the above technical solution provided by the present invention can achieve the following beneficial effects:
(1) based on WebGIS, a constructed river channel water surface curve calculation model is innovatively embedded, real-time simulation calculation of a water surface curve of any river channel is supported, a calculation result can be dynamically displayed on a two-dimensional river channel map in real time, and a decision maker can be effectively assisted to efficiently perform related work of determining right and delimiting the riverway without an embankment;
(2) based on WebGIS, the real-time sharing of information among multiple departments can be well completed, a user can operate the network GIS at any place through a common browser, and informatization and scientization of river channel right determination demarcation work are further achieved.
Drawings
Fig. 1 is a schematic flowchart of an implementation method for determining the right and delimiting the embankment-free river based on the WebGIS provided by the embodiment;
FIG. 2 is a diagram illustrating a GIS map of a Liangzhou district pushed by a server to a client through a Web data service in an embodiment;
FIG. 3 is an interface diagram of relevant parameters required by a user to set a river water surface calculation model at a client according to a pushed GIS map in the embodiment;
FIG. 4 is a diagram of information of a cross section of a river channel in the example;
FIG. 5 is a diagram showing the initial result of the definition and demarcation of the dike-free riverway in the embodiment;
FIG. 6 is an interface diagram of a buffer zone delimited by riverway authorities set in the embodiment;
FIG. 7 is an interface diagram of the user performing bounding stub point drawing at the client according to the bounding result in the embodiment;
FIG. 8 is an interface diagram for the display and derivation of the result of the peg-point boundary in the example.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that, the present invention is based on the Internet platform, and the client application software adopts the network protocol and is applied to the Geographic Information System (GIS) on the Internet.
The WebGIS-based method for realizing the dike-free river channel right-determining demarcation, provided by the invention, has a flow diagram as shown in figure 1, and comprises the following steps:
(1) the river channel cross section information is obtained through drawn GIS map elements, and the method comprises the following substeps:
(1.1) drawing GIS map elements including an administrative region map, a land use type map, a DEM map and a river channel cross-sectional map by using ArcMap and ArcScene;
(1.2) loading mxd map elements into a map document, and performing symbolic rendering on each map element;
(1.3) releasing the mxd map document to an ArcGIS Server on a Server, specifying a service type during release, and simultaneously pushing a GIS map to multiple clients of a client through Web data service to obtain cross section information of the river channel.
(2) The method comprises the following substeps of calculating the river surface curve through Web data service and an established river surface curve calculation model:
(2.1) setting the diffusion coefficient and the roughness of the river channel and the flood level of the first cross section at the client according to the pushed GIS map by the user, and transmitting the diffusion coefficient, the roughness and the flood level to the server through Web data service;
(2.2) the server side passes through Bernoulli equation according to the parameters uploaded by the client side and the cross section information of the river channel
Calculating flood levels of all cross sections in sequence from the first cross section;
wherein the on-way head loss hfThe calculation of (2):
local head loss hεThe calculation of (2):
average velocity of flow V across the cross-sectionuThe calculation of (2):
lower cross section average flow velocity VLThe calculation of (2):
upper cross section KuThe calculation of (2):
lower cross section KLThe calculation of (2):
in the formula, Zu、ZL-flood level (m) of upper and lower cross-section; vu、VL-average flow velocity (m/s) of the upper and lower cross sections; qu、QLFlow (m) of the upper and lower cross-sections3/s)；Au、ALCross-sectional area of water (m) of upper and lower cross-sections2) (ii) a S represents the space (m) between the upper and lower cross sections; n isu、nL-roughness of the upper and lower cross-sections; ru、RL-hydraulic radius (m) of the upper and lower cross-sections; epsilon-diffusion coefficient; g-acceleration of gravity (m/s)2)。
(3) Determining a river water surface curve through river cross section information and flood levels of all cross sections, and comprising the following substeps:
(3.1) determining intersection points of the flood level of each cross section and the left and right shorelines of the cross section;
and (3.2) sequentially connecting the intersection points of the flood level of each cross section and the left shoreline of the cross section, and sequentially connecting the intersection points of the flood level of each cross section and the right shoreline of the cross section to obtain a river surface curve.
(4) Determining a final result of the river channel demarcation according to the calculation result of the river channel water surface curve and the local actual situation, and comprising the following substeps:
(4.1) the server loads the calculated river water surface curve on a client GIS map through Web data service;
(4.2) the region between the river surface curves displayed by the client is the initial result of the non-levee river channel right-determining demarcation;
and (4.3) setting different riverway right-confirming demarcation buffer areas according to related laws and regulations and local actual conditions and by combining the land utilization conditions near the riverway water surface curve, and determining the final result of riverway right-confirming demarcation.
(5) The method completes the drawing, displaying and exporting of the boundary stake points through Web data service and the result of the river channel right-determining demarcation, and comprises the following substeps:
(5.1) drawing the boundary stake points by the user at the client according to the boundary result;
and (5.2) marking the serial number, the name, the longitude and latitude coordinates and the information of the right person of the stake point of the boundary by the user, and realizing the display and the derivation of the stake point result of the boundary.
In another aspect, the present invention provides a server, including:
the first pushing module is used for pushing GIS map elements to the client so that a user can obtain river channel cross section information at the client;
the receiving module is used for receiving corresponding parameters set by the client according to the information of the cross section of the river channel, wherein the corresponding parameters comprise the diffusion coefficient, the roughness and the flood level of the first cross section of the river channel;
the calculation module is used for calculating the flood level of each cross section of the river channel according to the cross section information of the river channel and the corresponding parameters;
the drawing module is used for determining the intersection point of each cross section flood level and the left and right shorelines thereof, and respectively and sequentially connecting the intersection points of each cross section flood level and the left and right shorelines thereof to obtain a river surface curve;
and the second pushing module is used for pushing the river surface curve to the client so as to enable the client to set different river channel right-confirming demarcation buffer areas based on the river surface curve, and set a demarcation pile point according to the river channel right-confirming demarcation buffer area, so that the right demarcation of the riverway without the dike is realized.
In another aspect, the present invention provides a client, including:
the first receiving module is used for receiving GIS map elements pushed by the server and acquiring cross section information of a river channel;
the setting module is used for setting corresponding parameters according to the information of the cross section of the river channel, wherein the corresponding parameters comprise the diffusion coefficient, the roughness and the flood level of the first cross section of the river channel;
the pushing module is used for sending the corresponding parameters to the server so that the server calculates the flood level of each cross section of the river according to the cross section information of the river and the corresponding parameters, determines the intersection point of each cross section flood level and the left and right shorelines of the cross section flood level, and sequentially connects the intersection points of each cross section flood level and the left and right shorelines of the cross section flood level to obtain a river surface curve;
the second receiving module is used for receiving the river surface curve pushed by the server and setting different river channel right-defining delimiting buffer zones; and setting boundary pile points according to the riverway right-defining demarcating buffer area, thereby realizing the right-defining demarcating of the riverway without the dike.
The WebGIS-based method for realizing the watercourse jetty delimitation and demarcation based on the embankment riverway is specifically described by taking a Liangzhou district as an example area, and the method for realizing the watercourse jetty delimitation and demarcation based on the WebGIS specifically comprises the following steps of:
1. obtaining river channel cross section information according to the issued Liangzhou area GIS map: drawing map elements including administrative region maps, land use type maps, DEM maps, cross-sectional views of river channels and the like by using ArcMap and ArcScene; loading the map elements of the Luzhou district into mxd map documents, and performing symbolic rendering on the map elements; the mxd map document is published to an ArcGIS Server of the Server, the service type is specified during publication, and a Liangzhou area GIS map is pushed to the client through a Web data service at the Server, as shown in FIG. 2.
2. Establishing a river channel water surface curve calculation model, and calculating a river channel water surface curve according to river channel cross section information: the user sets the diffusion coefficient and the roughness of the red river and the flood level of the first cross section at the upstream (as shown in figure 3) at the client according to the pushed GIS map of the Liangzhou area, and the diffusion coefficient and the roughness of the red river are transmitted to the server through Web data service; the server side calculates flood levels of all cross sections in sequence from the first cross section at the upstream through the established river water surface curve calculation model according to corresponding parameters uploaded by the client side and cross section information of the red water river in the map (the information condition of a certain cross section of the red water river is shown in figure 4);
3. firstly, determining intersection points of flood levels of all cross sections of the red river and left and right shorelines of the red river, then sequentially connecting the intersection points of the flood levels of all cross sections of the red river and the left shoreline of the red river, and finally sequentially connecting the intersection points of the flood levels of all cross sections of the red river and the right shoreline of the red river to obtain a water surface curve of the red river;
4. according to the river surface curve calculation result of the red water river and the land utilization condition near the river surface curve, performing river right determination demarcation: the server loads the calculated red water river surface curve on a client GIS map through Web data service; the region between the water surface curves of the red water river displayed by the client is the initial result of the sure right demarcation of the non-embankment river channel, as shown in fig. 5; according to related laws and regulations and local actual conditions, different river channel right-determining demarcation buffer zones are set by combining the land utilization conditions near the water surface curve of the red water river, the river channel right-determining demarcation buffer zones are the areas between the black lines and the white lines of the two banks of the river channel in the graph 6, and the final result of the red water river right-determining demarcation is determined.
5. And (3) completing the drawing, displaying and deriving of boundary pile points according to the result of the right-confirming demarcation of the river course of the red water river: the user draws the boundary pile points at the client according to the boundary result, the boundary pile points are shown as white dots in fig. 7, the user marks the serial numbers, names, longitude and latitude coordinates and the information of the right person of the boundary pile points, and the drawn boundary pile points are derived, as shown in fig. 8.
The method combines the advantages of Web in information sharing and GIS in the aspect of spatial data processing, and is beneficial to solving the problems that the traditional method consumes a long time and consumes a large amount of money in the dike-free river channel right-confirming and demarcation work, the drawing precision is low due to drawing errors, the information sharing efficiency among multiple departments is low, and the like; the method can better assist decision makers to scientifically carry out related work of watercourse right-determining demarcation, so that the existing water resources are reasonably utilized to the maximum extent, a good foundation is laid for economic development of the region, and the method has practical social requirements and wide popularization and application values.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A realization method for determining the right and delimiting the dike-free river channel based on WebGIS is characterized by comprising the following steps:
(1) obtaining river channel cross section information based on the drawn GIS map elements;
(2) calculating flood levels of all cross sections of the river according to the cross section information of the river, the diffusion coefficient and the roughness of the river and the flood level of the first cross section;
(3) determining the intersection point of each cross section flood level and the left and right shorelines thereof, and respectively and sequentially connecting the intersection points of each cross section flood level and the left and right shorelines thereof to obtain a river surface curve;
(4) setting different riverway right-confirming demarcation buffer zones based on the riverway water surface curve;
(5) and setting boundary pile points according to the riverway right-defining demarcating buffer area, thereby realizing the right-defining demarcating of the riverway without the dike.
2. The WebGIS-based dike-free riverway right-determining and delimiting implementation method is characterized in that the step (1) specifically comprises the following steps:
(1.1) drawing GIS map elements by using ArcMap and ArcScene, wherein the GIS map elements comprise an administrative region map, a land use type map, a DEM (dynamic elevation model) map and a river channel cross-sectional map;
(1.2) loading the GIS map elements into mxd map documents, and performing symbolic rendering on each map element;
(1.3) releasing the mxd map document to an ArcGIS Server on a Server, designating a service type during release, and simultaneously pushing a GIS map to multiple users of a client through Web data service so that the users obtain cross section information of the river channel at the client.
3. The WebGIS-based dike-free riverway right-determining and delimiting implementation method is characterized in that the step (2) specifically comprises the following steps:
(2.1) setting the diffusion coefficient and the roughness of the river channel and the flood level of the first cross section according to the cross section information of the river channel;
(2.2) by Bernoulli equation
Calculating flood levels of all cross sections in sequence from the first cross section;
wherein the on-way head loss hfComprises the following steps:
local head loss hεComprises the following steps:
average velocity of flow V across the cross-sectionuComprises the following steps:
lower cross section average flow velocity VLComprises the following steps:
upper cross section KuComprises the following steps:
lower cross section KLComprises the following steps:
in the formula, Zu、ZL-flood level (m) of upper and lower cross-section; vu、VL-average flow velocity (m/s) of the upper and lower cross sections; qu、QLFlow (m) of the upper and lower cross-sections3/s)；Au、ALCross-sectional area of water (m) of upper and lower cross-sections2) (ii) a S represents the space (m) between the upper and lower cross sections; n isu、nL-roughness of the upper and lower cross-sections; ru、RL-hydraulic radius (m) of the upper and lower cross-sections; epsilon-diffusion coefficient; g-acceleration of gravity (m/s)2)。
4. The WebGIS-based dike-free riverway right-determining and delimiting implementation method is characterized in that the step (3) specifically comprises the following steps:
(3.1) determining intersection points of the flood level of each cross section and the left and right shorelines of the cross section;
and (3.2) sequentially connecting the intersection points of the flood level of each cross section and the left shoreline of the cross section, and sequentially connecting the intersection points of the flood level of each cross section and the right shoreline of the cross section to obtain a river surface curve.
5. The WebGIS-based dike-free riverway right-determining and delimiting implementation method is characterized in that the step (4) specifically comprises the following steps:
(4.1) the server loads the calculated river water surface curve on a client GIS map through Web data service;
(4.2) the region between the river surface curves displayed by the client is the initial result of the non-levee river channel right-determining demarcation;
and (4.3) setting different riverway right-confirming demarcation buffer areas by combining the land utilization conditions near the riverway water surface curve, and determining the final result of riverway right-confirming demarcation.
6. The WebGIS-based dike-free riverway right-determining and delimiting implementation method is characterized in that the step (5) specifically comprises the following steps:
(5.1) delimiting a buffer area at the client according to the river channel right, and drawing the boundary stake points;
and (5.2) marking the serial number, the name, the longitude and latitude coordinates and the information of the right person of the stake point at the client side, and realizing the display and the derivation of the stake point result of the boundary.
7. A server, characterized in that the server comprises:
the first pushing module is used for pushing GIS map elements to the client so that a user can obtain river channel cross section information at the client;
the receiving module is used for receiving corresponding parameters set by the client according to the information of the cross section of the river channel, wherein the corresponding parameters comprise the diffusion coefficient, the roughness and the flood level of the first cross section of the river channel;
the calculation module is used for calculating the flood level of each cross section of the river channel according to the cross section information of the river channel and the corresponding parameters;
the drawing module is used for determining the intersection point of each cross section flood level and the left and right shorelines thereof, and respectively and sequentially connecting the intersection points of each cross section flood level and the left and right shorelines thereof to obtain a river surface curve;
and the second pushing module is used for pushing the river surface curve to the client so as to enable the client to set different river channel right-confirming demarcation buffer areas based on the river surface curve, and set a demarcation pile point according to the river channel right-confirming demarcation buffer area, so that the right demarcation of the riverway without the dike is realized.
8. A client, the client comprising:
the first receiving module is used for receiving GIS map elements pushed by the server and acquiring cross section information of a river channel;
the setting module is used for setting corresponding parameters according to the information of the cross section of the river channel, wherein the corresponding parameters comprise the diffusion coefficient, the roughness and the flood level of the first cross section of the river channel;
the pushing module is used for sending the corresponding parameters to the server so that the server calculates the flood level of each cross section of the river according to the cross section information of the river and the corresponding parameters, determines the intersection point of each cross section flood level and the left and right shorelines of the cross section flood level, and sequentially connects the intersection points of each cross section flood level and the left and right shorelines of the cross section flood level to obtain a river surface curve;
the second receiving module is used for receiving the river surface curve pushed by the server and setting different river channel right-defining delimiting buffer zones; and setting boundary pile points according to the riverway right-defining demarcating buffer area, thereby realizing the right-defining demarcating of the riverway without the dike.
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