Runoff calculation and prediction method based on watershed hydrological model

A technology of hydrological models and prediction methods, applied in prediction, calculation, instruments, etc., can solve the problems of complex calculation process and slow model response, and achieve the effects of wide application range, high model accuracy and fast calculation speed

Active Publication Date: 2021-05-11
TIANJIN UNIV
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Problems solved by technology

However, the current distributed hydrological model has many complex calculation processes and slow model response

Method used

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  • Runoff calculation and prediction method based on watershed hydrological model
  • Runoff calculation and prediction method based on watershed hydrological model
  • Runoff calculation and prediction method based on watershed hydrological model

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Embodiment Construction

[0051] The technical solutions of the present invention will be further described below through specific examples.

[0052] A method for calculating and predicting runoff based on a watershed hydrological model is carried out according to the following steps:

[0053] Step 1, establish the basic watershed database;

[0054] This case selects the Songhua River Basin in Northeast my country as a case study. The DEM elevation data of the Songhua River Basin are as follows: figure 2 As shown, the land use data and river network distribution are as follows image 3 As shown, the distribution of monitoring stations for meteorological data (rainfall and temperature) is as follows Figure 5 shown.

[0055] Step 2, dividing the hydrological response unit;

[0056] After establishing the basic watershed database, first use the DEM elevation data to generate the river network of the watershed, and define the total outlet of the watershed; then divide the sub-basin according to the ...

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Abstract

The invention provides a runoff calculation and prediction method based on a watershed hydrological model. The method comprises the steps: building a watershed hydrological model, and constructing a feature region basic watershed database; dividing hydrological response units according to different characteristic area basic drainage basin data; inputting localized model data, and carrying out related data simulation; determining model parameters of the watershed hydrological model; verifying the correctness of the watershed hydrological model; and inputting meteorological data in the watershed in a future climate scene into the watershed hydrological model, and predicting the river runoff in the hydrological response unit. According to the rainfall runoff and rainfall runoff prediction method, the whole runoff production and confluence process in the drainage basin is considered, the water flow movement process of the whole drainage basin is simulated by inputting climate data, drainage basin data and land utilization data of the drainage basin, and the rainfall runoff and rainfall runoff prediction method can be well applied to simulation of river runoff of the drainage basin and is fast in rainfall runoff calculation and program response.

Description

technical field [0001] The invention relates to the technical field of rainfall-generated runoff simulation, in particular to a method for calculating and predicting runoff based on a watershed hydrological model. Background technique [0002] Rainfall is the main driving force of non-point source pollution in the watershed. With the erosion of rainfall, it is easy to form surface runoff with a high concentration of pollutants, and the pollution of rainwater runoff will be directly discharged into the receiving water body, resulting in an increase in the pollution load of the water environment. The watershed hydrological model is helpful to study the erosion law of rainfall runoff and pollutants, and further control the non-point source pollution load input of rainfall runoff. Therefore, the simulation of rainfall-runoff relationship has always been one of the key research fields of hydrological analysis. [0003] The research on rainfall-runoff simulation has been develop...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/26G06F16/29
CPCG06Q10/04G06Q50/26G06F16/29
Inventor 文莹亭童银栋齐淼孙静静许茜雯
Owner TIANJIN UNIV
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