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Non-point source pollution migration capability estimation method based on water-permeable and water-impermeable pattern

A non-point source pollution and capacity technology, applied in the field of urban pollution risk assessment, can solve problems such as inaccurate estimation methods, and achieve the effect of simplifying the classification system and reducing difficulty

Active Publication Date: 2021-01-01
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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Problems solved by technology

[0004] In view of the above problems, the present invention provides a method for estimating the migration capacity of non-point source pollution based on a permeable-impermeable pattern, which is used to at least partially solve technical problems such as inaccurate traditional estimation methods

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  • Non-point source pollution migration capability estimation method based on water-permeable and water-impermeable pattern
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  • Non-point source pollution migration capability estimation method based on water-permeable and water-impermeable pattern

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[0041] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0042]The first embodiment of the present disclosure provides a method for estimating the migration capacity of non-point source pollution based on the permeable-impermeable pattern, please refer to figure 1 , including: S1, according to the ratio of impervious surface area, divide the urban land parcels into the first quantity of development intensity parcels; S2, according to the spatial distribution of the permeable surface-impervious surface, divide the urban land parcels into the second quantity of space Model plot; S3, calculate the retention coefficient RC of the first quantity type and the second quantity type plot:

[0043]

[0044] Among them, i represents the catchment area of ​​the i-th urban plot, k repres...

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Abstract

The invention provides a non-point source pollution migration capability estimation method based on a water-permeable and water-impermeable pattern. The method comprises the following steps: S1, dividing an urban land parcel into development intensity land parcels of a first quantity type according to a water-impermeable surface area ratio; S2, dividing the urban land parcel into a second number of spatial pattern plots according to the spatial distribution of the permeable surface and the impermeable surface; s3, calculating retention coefficients of the plots of the first quantity type and the second quantity type; S4, calculating a comprehensive runoff coefficient to represent the average runoff production capacity of the catchment area of the urban land parcel; and S5, characterizing the migration capability of the surface runoff and the pollutants thereof by adopting the migration factor Ft. According to the method provided by the invention, the existing classification system is simplified, and the difficulty of estimating the urban non-point source pollution risk is reduced.

Description

technical field [0001] The invention relates to the technical field of urban pollution risk assessment, in particular to a method for estimating migration capacity of non-point source pollution based on a permeable-impermeable pattern. Background technique [0002] The overall runoff capacity of current catchment units is often characterized by comprehensive runoff coefficients. The traditional comprehensive runoff coefficient is widely used in the design of sponge cities and the control of water quality and volume in foreign countries. However, the comprehensive runoff coefficient has the following defects: 1) The impact of the spatial pattern of permeable and impermeable surfaces on runoff retention, infiltration and other hydrological processes is ignored, resulting in a high estimate of runoff. The widely used water quality volume control method is only based on the impervious rate Estimation of runoff coefficient; 2) The impact of slope and other topographical features...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06Q10/06G06Q50/26G06F111/10
CPCG06Q10/0635G06Q50/26G06F30/20G06F2111/10
Inventor 赵洪涛廖云杰江燕李叙勇
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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