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Sub-basin confluence simulation method considering influence of silt dam

A simulation method and technology for check dams, applied in the field of sub-basin confluence simulation considering the influence of check dams

Active Publication Date: 2020-04-03
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of sub-basin confluence simulation method considering the influence of check dams, thereby solving the aforementioned problems existing in the prior art

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  • Sub-basin confluence simulation method considering influence of silt dam
  • Sub-basin confluence simulation method considering influence of silt dam
  • Sub-basin confluence simulation method considering influence of silt dam

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Embodiment

[0080] Such as figure 1 As shown, the embodiment of the present invention provides a sub-basin confluence simulation method considering the influence of check dams, including the following steps:

[0081] 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 to illustrate the entire confluence process. 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 elevation, and contour zone 3 has the lowest elevation, such as figure 2 shown. In the application example extraction, the river channel extraction threshold is set to 5km 2 .

[0082] S2, set 0.5km 2 Threshold to extract candidate channels. Find the candidate ditch grid that directly flows into the river grid as the outlet grid, and perform a traceable traversal search on it to find the longest alternative ch...

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Abstract

The invention discloses a sub-basin confluence simulation method considering the influence of a silt dam, and relates to the technical field of distributed hydrological model sub-basin confluence simulation. The method includes: adopting a sub-basin contour zone sleeving mode as a model basic calculation unit; dividing the sub-basins into equal-height zones with different numbers according to theelevation based on DEM; and counting relevant parameters, extracting channel grids, setting channel length thresholds, elimiating dummy channels, carrying out generalization on the silt dam in the equal-height zone and carrying out statistics on related parameters of the silt dam; carrying out slope confluence process simulation on each equal-height zone and caryring out confluence process simulation on sub-basin channels by adopting a kinematic wave equation, carrying out regulation and storage correction on channel confluence amount by adopting a silt dam water balance principle, and simulating a riverway confluence process by adopting the kinematic wave equation. According to the method provided by the invention, the influence of silt dam construction in the calculation unit on the confluence process can be simulated.

Description

technical field [0001] The invention relates to the technical field of distributed hydrological model sub-basin confluence simulation technology, in particular to a method for sub-basin confluence simulation considering the influence of check dams. 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. As the complexity of the research question increases, so does the model functionality. In the mountainous area of ​​the Loess Plateau, ditches are vertical and horizontal. In order to effectively use rainwater to increase food production, a large number of check dams have been built on the ditches in this area to store the sediment deposited by floods in the mountainous areas and to reclaim fields. The check dam area is flat and relatively large, which can effectively intercept the flood in the upstream channel, increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F16/29
CPCG06F16/29
Inventor 刘佳嘉周祖昊严子奇龚家国贾仰文牛存稳褚俊英王浩桑学锋
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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