Sub-basin confluence simulation method based on slope channel river three-level structure

A technology of tertiary structure and simulation method, applied in structured data retrieval, 3D modeling, image data processing, etc.

Active Publication Date: 2020-01-21
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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[0003] The purpose of the present invention is to provide a sub-basin confluence simulation method based on ...

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  • Sub-basin confluence simulation method based on slope channel river three-level structure
  • Sub-basin confluence simulation method based on slope channel river three-level structure
  • Sub-basin confluence simulation method based on slope channel river three-level structure

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[0069] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.

[0070] Such as figure 1 As shown, the embodiment of the present invention provides a sub-basin confluence simulation method based on the three-level structure of the slope channel channel, including the following steps:

[0071] In S1, the sub-basin contour zone is used as the basic calculation unit of the model. In this example, one sub-basin is taken as an example for illustration, such as figure 2 shown. Among them, it is assumed that the sub-watershed is divided into three contour zones, which are sorted and segmented according to the grid elevation. Contour zone 1 has the highest elevatio...

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Abstract

The invention discloses a sub-basin confluence simulation method based on a slope channel riverway three-level structure, and relates to the technical field of distributed hydrological model confluence simulation. The method comprises the following steps: extracting a river channel and a channel based on DEM data, and dividing drainage basin grids into slope grids, channel grids and river channelgrids according to categories; calculating the length of a confluence path from each grid to a basin outlet, and counting the number of channels and the average length of the channels according to thetypes of the channel grids; setting the confluence attribute of each grid in the drainage basin according to the riverway or channel grid into which each grid finally converges; and according to thegrid confluence attribute, determining equal-height zone slope, channel and river channel runoff distribution coefficients respectively, and adopting a motion wave equation as a basic simulation formula of slope, channel and river channel confluence to perform confluence simulation on the sub-basins and the equal-height zones. According to the method, the influence of the channel confluence process on water circulation can be considered, and the confluence process simulation effect is improved.

Description

technical field [0001] The invention relates to the technical field of distributed hydrological model confluence simulation technology, in particular to a method for simulating sub-basin confluence based on the three-level structure of slope surface, channel and channel. Background technique [0002] Distributed hydrological model is an effective means to study the process and mechanism of water cycle, and it is also an effective tool to solve many practical hydrological problems. It is a common method to discretize the research watershed by using sub-watersheds to reflect the spatial heterogeneity of parameters. This method has the advantage of greatly reducing the number of calculation units while maintaining the accuracy of describing the relationship between the upstream and downstream of the watershed. However, limited by the sub-basin division method, that is, there is only one river channel in the sub-basin, which makes the number of sub-basins conflict with the rive...

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Application Information

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IPC IPC(8): G06F30/18G06F16/29G06T17/05
CPCG06F16/29G06T17/05
Inventor 刘佳嘉周祖昊严子奇杜军凯龚家国贾仰文王浩贺华翔蔡静雅
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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