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General watershed water circulation simulation calculation method based on natural sub-watersheds

A simulation calculation and sub-basin technology, applied in calculation, computer aided design, design optimization/simulation, etc., can solve problems such as low calculation accuracy, limited calculation accuracy, low practicability, and low versatility, and achieve high calculation accuracy, Strong fault tolerance and simple maintenance

Active Publication Date: 2021-04-13
POWER CHINA KUNMING ENG CORP LTD
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Problems solved by technology

[0008] Aiming at the problems that the existing calculation method based on rainfall station calculation unit for basin water cycle simulation calculation method is not practical, universal, and calculation accuracy is limited, a A general water cycle simulation calculation method based on natural sub-basins. This method uses natural sub-basins as calculation units for runoff production and slope confluence. The areal rainfall input of each sub-basin is calculated by the high fault-tolerant areal rainfall calculation method invented this time.
The present invention solves the problem that the original method cannot take into account the calculation of sub-unit production and confluence of different hydrological and climatic conditions in the basin, the lack of physical meaning of the river network confluence leads to low calculation accuracy, and the inability to quantitatively analyze the cross-basin incoming water / outflow to the water circulation of the basin The three major problems of the impact of water resources can provide strong theoretical and technical support for the analysis and calculation of water resources in the basin and the optimal allocation of water resources in the basin.

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  • General watershed water circulation simulation calculation method based on natural sub-watersheds
  • General watershed water circulation simulation calculation method based on natural sub-watersheds
  • General watershed water circulation simulation calculation method based on natural sub-watersheds

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Embodiment Construction

[0187] Taking the watershed controlled by the Hushan hydrological station in Raohe River, Jiangxi Province as the research object, the water cycle simulation analysis based on natural sub-basins was carried out.

[0188] The main implementation steps of the present invention are as follows (main process sees figure 1 ):

[0189] Step 1: Based on the DEM topographic data, use ArcGIS software to conduct hydrological analysis on the research watershed - the watershed controlled by the Hushan Hydrological Station, and divide the research watershed into 13 sub-basins, such as figure 2 As shown, the channels in each sub-basin are extracted. The number of the corresponding downstream sub-basins of each sub-basin is specified, and the calculation order of the river confluence of the sub-basins is analyzed by using the topological relationship model.

[0190] Table 1 Calculation sequence of river confluence in the sub-basins of the Hushan hydrological station based on the analysis o...

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Abstract

The invention relates to a general watershed water circulation simulation calculation method based on natural sub-watersheds, the natural sub-watersheds are used as calculation units for runoff production and slope confluence, and the surface rainfall input of each sub-watershed is calculated by adopting the high-fault-tolerance surface rainfall calculation method disclosed by the invention. Different runoff production and confluence models can be adopted for all the sub-basins to fully reflect climate and underlying surface characteristics, river network confluence is achieved between the sub-basins through a topological relation model and a hydrodynamic model, and finally the flow process of the outlet section of each sub-basin is obtained through calculation. For the influence of the cross-basin water diversion project, the influence is generalized into the increase and decrease influence of single river flow evolution on the outlet flow of the nearest downstream sub-basin under the input boundary of the upstream flow process. The method can provide powerful theoretical and technical support for basin water resource analysis and calculation and basin water resource optimal allocation.

Description

technical field [0001] The invention belongs to the field of water cycle simulation analysis in a watershed, and more specifically, relates to a water cycle simulation of a watershed that imitates the natural flow-generating structure characteristics of a watershed, can adapt to different climates and distribution conditions of underlying surfaces in a watershed, and can quantitatively analyze the influence of cross-basin water diversion projects Calculation method. Background technique [0002] At present, in the field of water cycle simulation and analysis in the basin, the calculation method of water cycle simulation and calculation based on the calculation unit of the rainfall station has been widely used. In this method, according to the basin topography, landform conditions and the deployed rainfall station network, the research basin is divided into several rainfall station calculation units by the Thiessen polygon method, and each calculation unit corresponds to the ...

Claims

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Application Information

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IPC IPC(8): G06F30/28G06F113/08G06F119/14
CPCG06F30/28G06F2113/08G06F2119/14Y02A90/10
Inventor 杨开斌夏建荣韩兵刘阳容卢鹏周鹏程
Owner POWER CHINA KUNMING ENG CORP LTD
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