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Method of calculating distributed runoff generation in plain area under urbanization

A flow computing and urbanization technology, applied in the computer field, can solve problems that are not well combined with regional remote sensing, rainfall, etc.

Inactive Publication Date: 2018-04-06
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the existing technical methods use statistical data to calculate runoff as a whole, and do not combine regional remote sensing, rainfall and other data well.

Method used

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  • Method of calculating distributed runoff generation in plain area under urbanization
  • Method of calculating distributed runoff generation in plain area under urbanization
  • Method of calculating distributed runoff generation in plain area under urbanization

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0073] Taking the Suzhou region of the plain water network area in the Taihu Lake Basin as an example, the rainfall data of the typical year 1991 were used to calculate the water yield of each sub-unit of the Suzhou region under the land use conditions in 1991.

[0074] (1) Division of sub-water production units

[0075] First, add the coordinate file containing 26 rainfall stations in the Suzhou area to Arcgis, right-click the data table file after adding it, and select Display XY data to generate the Sheet1$Events layer, see figure 2 ; Then, right-click the layer "data" Export Data" to export the file as a shapefile, see image 3 . Create Thiessen polygons of rainfall stations through the ArcGIS 10.3 tool CreatesThiessen polygons, and then superimpose (Identity tool) regional partition boundaries (in this example, Suzhou is taken as an example, and Changshu City, Kunshan City, Taicang City, Zhangjiagang City and Suzhou City are divided into 5 districts Large area), so as ...

Embodiment 2

[0087] MATLAB calculation code

[0088]

[0089]

[0090]

[0091]

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Abstract

The invention discloses a method of calculating distributed runoff generation in a plain area under urbanization. The method comprises steps: S1, ArcGIS software is used to divide sub runoff generation units; S2, the ArcGIS software is used to calculate the area of a different land use type in each sub runoff generation unit; and S3, MATLAB software is used to calculate the runoff generation of adifferent land use type in each sub runoff generation unit. The method can simply and conveniently realize calculation on the monthly runoff generation in the plain area. In comparison with the traditional technical method, calculation on the runoff generation can be directly realized through space data (land use, a sub basin boundary and a district boundary); in comparison with the traditional method, the method can calculate the runoff generation in the area space in a distributed mode, and only one runoff generation in a whole large area does not exist; and the method can output the calculation result of each sub runoff generation unit in a formatted mode, and a runoff generation result can be provided for a distributed hydrological model directly.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a method for calculating distributed runoff in plain areas under urbanization. Background technique [0002] Runoff refers to the net rain formed by deducting losses from precipitation (plant interception, infiltration, filling and evaporation, etc.). Runoff calculation is an important part of hydrological calculation. Water production can reflect the regional flood situation to a certain extent; it is also an important part of the hydrological model and provides input for the confluence module. [0003] For the methods of runoff calculation, the common ones are initial damage constant method, SCS curve method and SMA method (Soil Moisture Accuting). For runoff in plain areas, it is generally calculated separately according to different underlying surface types. For example, Yu Xiaozhen (1990) divided the underlying surface into four models: water surface, paddy field, dry lan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/06
CPCG06Q50/06
Inventor 王强许有鹏高斌项捷袁甲
Owner NANJING UNIV
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