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A Method for Estimating and Calculating the Inflow Coefficient of Multi-scale Non-point Source Pollutants Based on Runoff Path

A pollutant, multi-scale technology, applied in the field of water resources and water environment in the basin, can solve the problems of high labor and material costs, difficult to promote, etc., and achieve the effect of avoiding time-consuming and labor-intensive

Active Publication Date: 2022-05-17
INNOVATION ACAD FOR PRECISION MEASUREMENT SCI & TECH CAS
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Problems solved by technology

The manpower and material cost of the actual measurement method is relatively large, and it is only suitable for small watersheds with simple pollution sources and clear catchment paths, and it is difficult to popularize in a large scale

Method used

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  • A Method for Estimating and Calculating the Inflow Coefficient of Multi-scale Non-point Source Pollutants Based on Runoff Path
  • A Method for Estimating and Calculating the Inflow Coefficient of Multi-scale Non-point Source Pollutants Based on Runoff Path
  • A Method for Estimating and Calculating the Inflow Coefficient of Multi-scale Non-point Source Pollutants Based on Runoff Path

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Embodiment 1

[0107] see figure 1 , a method for measuring and calculating the river-flow coefficient of multi-scale non-point source pollutants based on the runoff path. In this embodiment, the Han River Basin is selected as the research object, and the following steps are followed in turn:

[0108] 1. Acquire the basic geographic data of the watershed, including: digital elevation model DEM with a spatial resolution of 94 meters, water system data, land use data, soil type data, and time series of daily rainfall data covering 23 national basic meteorological stations from 2012 to 2014 ;

[0109] 2. After comprehensively considering the spatial resolution of DEM data and the size of typical land use plots that can be independently monitored, the size of the plot scale calculation unit is determined to be 94 meters. The upper and middle reaches of the Han River Basin are dominated by hills and mountains, and the lower reaches are mainly plains , after reducing the DEM value of the grid whe...

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Abstract

A method for calculating the river entry coefficient of multi-scale non-point source pollutants based on runoff paths. The method first determines the calculation units of grid blocks, sub-watersheds, and watersheds based on the basic geographic data of the watershed, and identifies each grid block in the watershed The runoff path to the outlet of the sub-basin, and then calculate the probability of three typical rainfall events of moderate rain, heavy rain, and heavy rain, and obtain the average concentration of surface runoff pollutants and the average pollutant interception of typical land use plots in the watershed under the three typical rainfall events Then determine the average surface runoff depth of each grid plot in the watershed under three typical rainfall events and the migration time of surface runoff flowing through each grid plot, and then calculate the average surface runoff of each grid plot under three typical rainfall events The amount of non-point source pollution and river inflow, and finally determine the non-point source pollutants inflow coefficient of each grid block, each sub-basin and watershed in turn. This design realizes the accurate and efficient determination of the river entry coefficient of non-point source pollutants.

Description

technical field [0001] The invention belongs to the technical field of river basin water resources and water environment, and relates to a method for measuring and calculating the coefficient of non-point source pollutants entering rivers, in particular to a method for measuring and calculating the coefficient of non-point source pollutants entering rivers based on runoff paths. Background technique [0002] Pollutants that cause deterioration of the water environment can be divided into point source pollution and non-point source pollution according to their sources. With the large-scale collection and treatment of industrial wastewater and urban domestic sewage, point source pollution has gradually been effectively controlled, and non-point source pollution driven by rainfall runoff has become the focus and difficulty of improving water environment quality. Based on the monitoring and investigation work of a large number of pollution sources in my country's pollution censu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06Q10/06G06Q50/06G06Q50/26G06F111/08G06F113/08
CPCG06F30/20G06Q10/0639G06Q50/06G06Q50/26G06F2111/08G06F2113/08Y02A20/152
Inventor 李思思张亮刘宏斌庄艳华杜耘夏必青
Owner INNOVATION ACAD FOR PRECISION MEASUREMENT SCI & TECH CAS
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