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A runoff calculation method for uncontrolled area based on spatially distributed runoff coefficients

A technology of runoff coefficient and calculation method, applied in calculation, design optimization/simulation, electrical and digital data processing, etc., can solve the problem of difficulty in accurately simulating runoff in uncontrolled areas, and achieve accurate water flow assessment and water balance analysis in the basin. Effect

Inactive Publication Date: 2018-12-25
WUHAN UNIV
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  • Application Information

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Problems solved by technology

It is difficult to accurately simulate the complex uncontrolled runoff of the underlying surface by using a spatially uniform runoff coefficient

Method used

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  • A runoff calculation method for uncontrolled area based on spatially distributed runoff coefficients
  • A runoff calculation method for uncontrolled area based on spatially distributed runoff coefficients
  • A runoff calculation method for uncontrolled area based on spatially distributed runoff coefficients

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Embodiment Construction

[0043] The specific implementation of the method for calculating runoff in uncontrolled areas based on spatially distributed runoff coefficients according to the present invention will be described in detail below in conjunction with the accompanying drawings.

[0044]

[0045] like figure 1 As shown, the method for calculating runoff in uncontrolled areas based on spatially distributed runoff coefficients provided in this embodiment includes the following steps:

[0046] Step 1. Prepare uncontrolled area data, including terrain data, land use type data, rainfall data, and measured runoff data in the upstream control area; and perform mosaic, cropping, projection conversion, and The spatial interpolation operation obtains the corresponding raster data within the study area, in which the spatial resolution of the raster data of the topographic data, land use type data, and rainfall data is the same.

[0047] like figure 2 As shown, the research area in this embodiment is t...

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Abstract

The invention provides a runoff calculation method of an uncontrolled area based on a spatial distributed runoff coefficient, which is characterized in that the method comprises the following steps: 1. preparing data of the uncontrolled area, including topographic data, land use type data, rainfall data and measured runoff data of an upstream control area; And the corresponding raster data in thestudy area are obtained by embedding, cutting, projection conversion and spatial interpolation of terrain data, land use type data and rainfall data, in which the spatial resolution of the raster dataof terrain data, land use type data and rainfall data is the same; 2, constructing a runoff coefficient model based on spatial distribution, calculating runoff based on pixel level, determining runoff coefficients corresponding to each pixel in the uncontrolled area, calculating grid runoff of corresponding pixels according to the runoff coefficients of each pixel, and then accumulating the gridrunoff of all pixels in the uncontrolled area to obtain regional runoff; 3. validating the runoff coefficient model.

Description

technical field [0001] The invention belongs to the application technology of spatial information technology in the field of hydraulic engineering, and in particular relates to a method for calculating runoff in uncontrolled areas based on spatially distributed runoff coefficients. Background technique [0002] An uncontrolled area is an area without sufficient hydrological observation data. At present, the network of observation stations in many parts of the world is not perfect, and the density of existing measured data is difficult to meet the accuracy requirements of hydrological forecasting in normal river basins. Runoff assessment in uncontrolled areas is one of the most challenging tasks in hydrological research. From the basin hydrometric station to the downstream confluence water body, there is an area without runoff observation data. Lack of runoff prevents hydrologists and scientists from accurately predicting water availability and analyzing water balances. Th...

Claims

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Application Information

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IPC IPC(8): G06F17/50G01W1/14G01C13/00
CPCG01C13/00G01W1/14G06F30/20Y02A90/30
Inventor 陆建忠张玲陈晓玲
Owner WUHAN UNIV
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