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Dynamic calculation method for lateral drainage coefficient of slope soil

A calculation method and technology of soil water content, which is applied in the field of dynamic calculation of slope soil lateral drainage coefficient, can solve the problem of low accuracy of slope soil lateral drainage coefficient without considering the real-time dynamic change of soil water content in the watershed. Poor reliability and other issues, to achieve the effect of fast automatic calculation, stable and reliable data source, and guaranteed accuracy and reliability

Active Publication Date: 2021-06-18
HOHAI UNIV
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Problems solved by technology

However, most of the existing methods for estimating the lateral drainage coefficient of slope soil do not take into account the real-time dynamic change of soil water content in the watershed, and use a fixed value in the whole rainfall-runoff process to make the calculated slope soil lateral drainage coefficient The accuracy of drainage coefficient is low and the reliability is poor

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  • Dynamic calculation method for lateral drainage coefficient of slope soil
  • Dynamic calculation method for lateral drainage coefficient of slope soil
  • Dynamic calculation method for lateral drainage coefficient of slope soil

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0041] like figure 1 As shown, the dynamic calculation method of slope soil lateral drainage coefficient provided by the invention comprises the following steps:

[0042] Step 1: Based on the digital elevation data of the target watershed, divide the target watershed into multiple orthogonal grid units, and the schematic diagram of dividing into multiple orthogonal grid units is as follows figure 2 shown.

[0043] Step 2: Obtaining each slope grid unit in each grid unit, the method includes the following steps:

[0044] Step 2.1: Obtain the cumulative value of the confluence of each grid unit.

[0045] Taking the grid unit Cell as the center, by comparing the elevation value of the grid uni...

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Abstract

The invention discloses a dynamic calculation method for a lateral drainage coefficient of slope soil, and the method comprises the steps: dividing a target drainage basin into a plurality of orthogonal grid units based on the digital elevation data of the target drainage basin, obtaining each slope grid unit, calculating the gradient of each slope grid unit, calculating the maximum lateral displacement of soil of each slope grid unit, calculating the soil water content of each slope grid unit at the target moment, and calculating the soil lateral drainage coefficient of each slope grid unit at the target moment. The slope soil lateral drainage coefficient obtained by the method provided by the invention is high in precision and high in reliability, and is beneficial to popularization and application of a hydrological model based on the coefficient in flood forecasting of small and medium-sized mountainous drainage basins.

Description

technical field [0001] The invention relates to the technical field of hydrology, in particular to a dynamic calculation method for slope soil lateral drainage coefficient. Background technique [0002] There are many rivers in my country, with a drainage area of ​​200 to 3000 km 2 There are nearly 9,000 small and medium watersheds in China. In recent years, affected by climate change, sudden floods of small and medium-sized rivers caused by local heavy rainfall have occurred frequently, and have become the main disasters causing casualties. Because small and medium watersheds are usually located in remote mountainous areas with complex terrain and steep slopes, the rapidly rising floods can easily cause flood disasters that endanger the personal safety of local residents and the social economy. Therefore, using hydrological models to forecast floods in small and medium watersheds has become an important problem to be solved . [0003] The lateral drainage coefficient of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06Q10/06
CPCG06Q10/0639G06F30/20Y02A10/40
Inventor 晁丽君张珂
Owner HOHAI UNIV
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