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Unified mode runoff production calculation method for variable runoff production layer

A flow computing and flow layer technology, which is applied in computing, computer-aided design, complex mathematical operations, etc., can solve the problem of difficult to take into account the refined description and rapid prediction of the production and confluence mechanism, and achieve the effect of strong engineering significance.

Active Publication Date: 2022-05-13
HOHAI UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above technical defects and provide a method for calculating runoff in a unified model of variable runoff layers, so as to solve the difficulties in fine description and rapid forecasting of runoff production and confluence mechanisms in the sudden flood forecasting of distributed hydrological models. balance problem

Method used

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  • Unified mode runoff production calculation method for variable runoff production layer
  • Unified mode runoff production calculation method for variable runoff production layer
  • Unified mode runoff production calculation method for variable runoff production layer

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Embodiment Construction

[0128] 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.

[0129] Such as figure 1 as shown,

[0130] Step 1. For a well-vegetated hillside in the southern humid area, take a square calculation unit with an area of ​​10m*10m, and measure the soil thickness with a 70-mm caliber gasoline-powered drill to determine the soil-bedrock interface depth. According to the canopy The top (the upper boundary of the calculation unit), the fresh bedrock interface (the lower boundary of the calculation unit), the surface and the soil-bedrock interface divide the calculation unit vertically into the vegetation interception layer, the soil layer and the weathered bedrock layer ( figure 2 );

[0131] Step 2. According to the vertical stratification results of step 1,...

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Abstract

The invention discloses a runoff production calculation method in a unified mode of a variable runoff production layer. The runoff production calculation method comprises the following steps: vertically layering calculation units; the evapotranspiration capacity of the calculation unit is deduced; runoff production calculation is carried out on the vegetation interception layer; dynamically dividing a soil layer theta-n calculation domain into a domain I and a domain II according to a steady-state soil moisture profile, respectively establishing equations for the domain I and the domain II, representing formation and development processes of a soil-rock interface change runoff layer and a soil interlayer change runoff layer, and performing runoff calculation; according to the calculation method, the formation and development process of the interflow is finely described, so that unified description of full storage-excess infiltration runoff production and a conversion mechanism thereof is realized. According to the method, the problem that fine description and rapid forecasting of a production and confluence mechanism of a distributed hydrological model in sudden flood forecasting in the hilly region are difficult to consider at the same time is solved.

Description

technical field [0001] The invention belongs to the technical field of hydrological models, and in particular relates to a method for calculating runoff in a unified model of a variable runoff layer. Background technique [0002] Most of the hilly areas in our country are flood-prone areas. Due to the comprehensive effect of meteorological and hydrological conditions and special terrain, mountain torrent disasters are frequent, which is the difficulty and weak link of our country's flood control work. The hydrological model is the main tool for flood forecasting. Generally, the hydrological model can be divided into black box model, conceptual model and distributed hydrological model. Existing studies and applications have shown that data-oriented black-box / conceptual models are difficult to meet the needs of sudden flood forecasting in hilly areas, and distributed hydrological models have become a future trend because they can realize flood forecasting at any location / secti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F30/28G06F17/11G06F113/08
CPCG06F30/13G06F30/28G06F17/11G06F2113/08Y02A10/40
Inventor 赵建飞梁忠民段雅楠李彬权仇知雨
Owner HOHAI UNIV
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