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A Dynamic Calculation Method of Lateral Drainage Coefficient of Slope Soil

A calculation method and technology for soil water content, which are applied in the field of dynamic calculation of the lateral drainage coefficient of slope soil, can solve the problem of not taking into account the real-time dynamic changes of soil water content in the watershed, the low accuracy of the lateral drainage coefficient of slope soil, Poor reliability and other problems, to achieve the effect of being conducive to fast automatic calculation, stable and reliable data source, and ensuring accuracy and reliability

Active Publication Date: 2021-09-07
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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  • A Dynamic Calculation Method of Lateral Drainage Coefficient of Slope Soil
  • A Dynamic Calculation Method of Lateral Drainage Coefficient of Slope Soil
  • A Dynamic Calculation Method of 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] Such as 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 ...

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Abstract

The invention discloses a method for dynamically calculating the lateral drainage coefficient of slope soil. The method includes: dividing the target watershed into a plurality of orthogonal grid units based on the digital elevation data of the target watershed, and obtaining each of the slope grid units. , calculate the slope of each slope grid unit, and then calculate the maximum lateral drainage of each slope grid unit, calculate the soil water content of each slope grid unit at the target time, and then calculate the slope The soil lateral drainage coefficient of the surface grid unit at the target time. The slope soil lateral drainage coefficient obtained by the method provided by the invention has high precision and strong reliability, and is helpful for popularization and application of a hydrological model based on the coefficient in flood forecasting of small and medium-sized watersheds in mountainous areas.

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 Patents(China)
IPC IPC(8): G06F30/20G06Q10/06
CPCG06Q10/0639G06F30/20Y02A10/40
Inventor 晁丽君张珂
Owner HOHAI UNIV
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