CN-121390964-B - Method, device, equipment, medium and product for calculating river diversion ratio

CN121390964BCN 121390964 BCN121390964 BCN 121390964BCN-121390964-B

Abstract

The invention relates to the technical field of hydrologic waterpower and discloses a method, a device, equipment, a medium and a product for calculating a river diversion ratio, wherein the method comprises the steps of obtaining water sand, topography of a target river reach, topography data corresponding to different working conditions and flood flow; under a moving bed, calculating the daily water sand, the topographic data and the flood flow corresponding to each working condition scheme to obtain second hydrologic information of the future period of the river reach when each flood flow occurs under different working conditions, dividing the river cross section into sub-sections and calculating the flow according to the first hydrologic information and the second hydrologic information respectively, determining a first diversion ratio and a second diversion ratio according to the flow ratio of the sub-sections, and determining a target river regulation scheme according to the first diversion ratio and the different second diversion ratios. The diversion ratio of the future river channel under the working conditions of the fixed bed and the moving bed is compared.

Inventors

LI LINQI
WANG DAYU
SUN YANLING
LIN JIAQI
ZHOU ZHAOQIANG
HUANG HAI
GUAN JIANCHAO
ZHANG LEI

Assignees

中国水利水电科学研究院

Dates

Publication Date: 20260508
Application Date: 20251224

Claims (10)

1.A method for simulating and calculating a split ratio in a river channel, the method comprising: acquiring long-series solar water sand data, initial topographic data, modified topographic data corresponding to different working condition schemes respectively of a target river reach, and flow rates when floods with different frequencies occur; under the fixed bed condition, calculating the long series of solar water sand data, the initial topography data and the flow when different-frequency floods occur by using a water sand two-dimensional mathematical model to obtain first hydrological information of a target river reach in a future period; Under the moving bed condition, calculating the long series of daily water sand data, the modified topographic data corresponding to each working condition scheme and the flow rate when different frequency floods occur by using the water sand two-dimensional mathematical model to obtain second hydrological information of the target river reach in a future period when each frequency flood occurs when different working condition schemes are implemented on the target river reach; Dividing each section in a target river channel into a plurality of sub-sections according to the first hydrological information and calculating the flow of each sub-section aiming at each frequency flood, and determining a first split ratio of the sections according to the flow ratio of each sub-section in the sections; when different working condition schemes are implemented on a target river reach, dividing each section in the target river reach into a plurality of sub-sections according to the second hydrologic information aiming at each frequency flood, calculating the flow of each sub-section, and determining a second split ratio of the sections according to the flow ratio of each sub-section in the sections; And determining a regulation and control scheme of the target river reach according to the first diversion ratio corresponding to each frequency flood and the second diversion ratio corresponding to different working condition schemes.
2. The method of claim 1, wherein under the moving bed condition, calculating the long series of solar water sand data, the modified terrain data corresponding to each working condition scheme respectively, and the flow rate when different frequency floods occur by using the water sand two-dimensional mathematical model to obtain second hydrological information of the target river reach in a future period when different working condition schemes are implemented on the target river reach, wherein the second hydrological information of the target river reach when each frequency flood occurs comprises: Under the moving bed condition, calculating the long series of daily water sand data and modified terrain data corresponding to each working condition scheme respectively by using the water sand two-dimensional mathematical model to obtain a plurality of groups of third hydrologic information of the target river reach in a future period, wherein one working condition scheme corresponds to one group of third hydrologic information, and the third hydrologic information comprises elevations of different positions of the target river reach; extracting evolution topography data of different working condition schemes according to elevations of different positions in the third hydrologic information; the evolution topographic data of different working condition schemes and the flow rate when different frequency floods occur are input into a water-sand two-dimensional mathematical model, and second hydrologic information of the target river reach in a future period when each frequency flood occurs when different working condition schemes are implemented on the target river reach under the moving bed condition is obtained.
3. The method of claim 1, wherein dividing each section in the target river channel into a plurality of sub-sections and calculating the flow rate of each sub-section according to the first hydrologic information for each frequency flood, respectively, comprises: determining a plurality of section lines and endpoint coordinates corresponding to the section lines respectively according to a pre-established section line file; Determining a river boundary point closest to the endpoint coordinate in the first hydrological information by using a tree data structure algorithm to obtain a section corresponding to each section line; The section is divided into a plurality of sub-sections.
4. The method of claim 1 or 3, wherein the first hydrologic information comprises water depths, horizontal flow rates and vertical flow rates at different locations in the target river reach, and wherein the step of calculating the flow rate of each sub-section based on the first hydrologic information comprises: dividing the section into a plurality of small segments; Performing interpolation operation on the first hydrologic information to obtain the water depth, horizontal flow velocity and vertical flow velocity of each small section; Calculating flow velocity projections of the small sections according to the normal vector, the horizontal flow velocity and the vertical flow velocity of the small sections; Calculating according to the flow velocity projection, the length and the water depth of each small section to obtain the flow of each small section; and adding the flow of all the small sections in the same sub-section to obtain the flow of each sub-section.
5. The method of claim 1, wherein when implementing different working conditions on the target river reach, dividing each section in the target river channel into a plurality of sub-sections according to the second hydrologic information and calculating the flow of each sub-section for each frequency flood, comprising: determining a plurality of section lines and endpoint coordinates corresponding to the section lines respectively according to a pre-established section line file; determining a river boundary point closest to the endpoint coordinate in the second hydrological information by using a tree data structure algorithm to obtain a section corresponding to each section line; The section is divided into a plurality of sub-sections.
6. The method of claim 1 or 5, wherein the second hydrologic information comprises water depths, horizontal flow rates and vertical flow rates at different locations in the target river reach, and wherein the step of calculating the flow rate of each sub-section based on the second hydrologic information comprises: dividing the section into a plurality of small segments; Performing interpolation operation on the second hydrologic information to obtain the water depth, horizontal flow velocity and vertical flow velocity of each small section; Calculating flow velocity projections of the small sections according to the normal vector, the horizontal flow velocity and the vertical flow velocity of the small sections; Calculating according to the flow velocity projection, the length and the water depth of each small section to obtain the flow of each small section; and adding the flow of all the small sections in the same sub-section to obtain the flow of each sub-section.
7. An apparatus for analog computation of split ratio in a river, said apparatus comprising: The data acquisition module is used for acquiring data required by calculation in the river channel to be measured, wherein the data comprises long-series daily water sand data, initial topography data, modified topography data respectively corresponding to different working condition schemes and flow when floods with different frequencies occur; The data calculation module is used for calculating the river diversion ratio according to data required by calculation in a river to be measured, and the calculation method comprises the steps of calculating the flow of the long series of daily water sand data, initial topography data and different frequency floods according to a water sand two-dimensional mathematical model under a fixed bed condition to obtain first hydrological information of the target river reach in a future period, calculating the long series of daily water sand data, modified topography data corresponding to each working condition scheme and the flow of the different frequency floods respectively according to the water sand two-dimensional mathematical model under the moving bed condition to obtain second hydrological information of the target river reach in the future period when different working condition schemes are implemented on the target river reach, dividing each section in the target river reach into a plurality of sub-sections according to the first hydrological information respectively, determining the first diversion ratio of the sections according to the flow ratio of the sub-sections in the sections, calculating the second hydrological ratio of the target river reach according to the second hydrological information corresponding to the sub-sections when different working condition schemes are implemented on the target river reach, and determining the second hydrological ratio of the target river reach according to the second hydrological ratio in the second section according to the sub-section in the section.
8. An electronic device, comprising: A memory and a processor, the memory and the processor being communicatively connected to each other, the memory having stored therein computer instructions, the processor executing the computer instructions to perform the method of simulating the calculation of the split ratio in a river as claimed in any one of claims 1 to 6.
9. A computer-readable storage medium having stored thereon computer instructions for causing a computer to perform the method of simulating the calculation of the split ratio in a river of any one of claims 1 to 6.
10. A computer program product comprising computer instructions for causing a computer to perform the method of simulating calculating the split ratio in a river as claimed in any one of claims 1 to 6.

Description

Method, device, equipment, medium and product for calculating river diversion ratio Technical Field The invention relates to the technical field of hydrologic waterpower, in particular to a method, a device, equipment, a medium and a product for calculating a river diversion ratio. Background For the actual river diversion ratio measurement and calculation, the actual flow velocity and the water depth can be obtained by utilizing a hydrological measurement method, the current flow velocity and the current flow area can be obtained by combining the elevation of the bed surface of the river, and the flow of different branches on the same section of the river can be calculated, so that the diversion ratio is obtained, the current diversion ratio measurement and calculation method for the actual river is relatively mature, but for the braided river, the river bed is changed continuously, and the diversion ratio is also a continuously-changing quantity under the dynamic condition. For the braided river in planning and renovation, when a plurality of treatment schemes need to be selected, the split ratio after the scheme implementation cannot be predicted through field measurement. Disclosure of Invention The invention provides a method, a device, equipment, a medium and a product for calculating a river diversion ratio, which are used for solving the problem that the diversion ratio after implementation of a scheme cannot be predicted through field measurement. In a first aspect, the invention provides a method for calculating river diversion ratio, comprising the steps of obtaining long-series daily water sand data, initial topography data, modified topography data respectively corresponding to different working condition schemes of a target river reach, and flow when floods with different frequencies occur; Under the fixed bed condition, calculating the long series of daily water sand data, initial topography data and flow when floods with different frequencies occur by using a water sand two-dimensional mathematical model to obtain first hydrological information of a target river reach in a future period; Under the moving bed condition, calculating long-series daily water sand data, modified topographic data corresponding to each working condition scheme respectively and flow rates when different frequency floods occur by using a water sand two-dimensional mathematical model to obtain second hydrological information of the target river reach in a future period when different working condition schemes are implemented on the target river reach; Dividing each section in a target river channel into a plurality of sub-sections according to first hydrological information and calculating the flow of each sub-section aiming at each frequency flood, and determining a first diversion ratio of the sections according to the flow ratio of each sub-section in the sections; When different working condition schemes are implemented on the target river reach, dividing each section in the target river reach into a plurality of sub-sections according to second hydrologic information aiming at each frequency flood, calculating the flow of each sub-section, and determining a second diversion ratio of the sections according to the flow ratio of each sub-section in the sections; and determining a regulation and control scheme of the target river reach according to the first diversion ratio corresponding to each frequency flood and the second diversion ratio corresponding to different working condition schemes. According to historical data of the river channel, the conditions of the fixed bed and the moving bed are introduced, the influence of the fixed bed and the moving bed on the future river channel diversion is judged, then the conditions of different working conditions are introduced, and the influence of the different working conditions on the future river channel diversion in the moving bed state can be judged. And the shunt ratio under each condition can be calculated according to the prediction results under different conditions, so that data support is provided for the selection of the subsequent regulation scheme. In an optional implementation manner, under a moving bed condition, calculating long-series daily water sand data, modified topographic data corresponding to each working condition scheme respectively and flow rates when different frequency floods occur by using a water sand two-dimensional mathematical model to obtain second hydrological information of a target river reach in a future period when each frequency flood occurs when different working condition schemes are implemented on the target river reach, wherein the method comprises the following steps: Under the moving bed condition, calculating long-series daily water sand data and modified terrain data corresponding to each working condition scheme respectively by using a water sand two-dimensional mathematical model to obtain a plurality of groups of thir