Method for calculating the pollution load of urban rainfall runoff by geostatistical model

Abstract

The invention relates to a method for calculating the pollution load of urban rainfall runoff by a geostatistical model. The method discloses a method for calculating the pollution load of urban rainfall runoff based on the geographic information technology. The method comprises following steps: rainfall runoff pollution information collection; spatial information database establishment; optimal GIS model construction and model processing; road surface (ground) runoff pollution load calculation; area runoff pollution load calculation. GIS technology is introduced to the method for the analysis of the rainfall runoff pollution spatial distribution features so as to reduce the mistakes brought by the subjective methods; at the same time, the GIS technology which is used for spatial simulation and analysis of rainfall runoff pollution is a quick and accurate method for calculating the pollution load of urban rainfall runoff; the method can provide scientific guidance for effective control strategy of rainfall runoff pollution, enforcement of pollution control measures and development of sponge city construction.

Description

technical field [0001] The invention relates to an analysis method for urban rainfall runoff pollution, in particular to a method for calculating urban rainfall runoff pollution load based on a geostatistical model. Background technique [0002] Urban rainfall runoff pollution refers to that during the rainfall process, the rainfall washes the urban ground, such as commercial areas, streets, parking lots, etc., forming a series of runoff that gathers a series of pollutants such as crude oil, salt, nitrogen, phosphorus, and toxic substances, and then flows into rivers Or lakes, resulting in the phenomenon of urban water pollution. [0003] As cities in our country gradually increase the control of point source pollution such as industrial wastewater and urban sewage, the proportion of urban rainfall runoff pollution (the main type of urban non-point source pollution) to urban water environment pollution has gradually become prominent. Relevant scholars of urban water environ...

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Problems solved by technology

[0007] It should be pointed out that although the output coefficient method has been continuously revised, it has the advantages of less required parameters, simple data acquisition, and acceptable result accuracy, but its essence still follows the division method of urban land use types (the "Urban Land Use Classification and Planning" is usually used in China Construction land standard "GB50137), and the runoff load output of the land type is simplified

The calculation method of runoff pollution load has the following problems, which leads to large errors in the calculation results of regional runoff pollution load:

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