Calculation method of drainage basin agricultural non-point source pollutant riverway reduction coefficient

A technology of pollutants and watersheds, applied in the field of measurement, can solve the problems of complex model structure, large demand for basic data and parameter data, and restrict application effects, etc., and achieve the effect of low cost

Active Publication Date: 2015-09-23
INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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However, due to the complex structure of the model and the large demand for basic data and

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  • Calculation method of drainage basin agricultural non-point source pollutant riverway reduction coefficient
  • Calculation method of drainage basin agricultural non-point source pollutant riverway reduction coefficient
  • Calculation method of drainage basin agricultural non-point source pollutant riverway reduction coefficient

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[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0033] figure 1 It shows the schematic diagram of the discharge of agricultural non-point source pollution into the lake, in which, 1 is the discharge route of nitrogen and phosphorus from agricultural planting industry, 2 is the discharge route of nitrogen and phosphorus from agricultural livestock and poultry breeding industry, and 3 is the disc...

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Abstract

The invention provides a calculation method of a drainage basin agricultural non-point source pollutant riverway reduction coefficient. The calculation method comprises the following steps: obtaining typical small drainage basin data in a target drainage basin; according to the typical small drainage basin data, constructing a soil and water assessment tool (SWAT) of a typical small drainage basin; according to the SWAT, obtaining the load Load<Lr> of nitrogen and phosphorus, which enter a riverway, of each sub riverway and a contribution rate Load<Lo> of each sub riverway to a water outlet of the riverway in the typical small drainage basin; and according to drainage system data, obtaining the total length Length<Lr> of the riverway in the typical small drainage basin; and according to the Load<Lr>, the Load<Lo> and the Length<Lr>, obtaining a target drainage basin agricultural non-point source pollutant riverway reduction coefficient. The method can simply, accurately and quickly obtain the drainage basin agricultural non-point source pollutant riverway reduction coefficient, is low in cost and can be comprehensively spread on a large scale.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to a calculation method for river channel reduction coefficient of agricultural non-point source pollutants in a watershed. Background technique [0002] With the rapid development of agriculture, the amount of chemical fertilizers and pesticides, the number of livestock and poultry breeding, and the living standards of rural areas have increased rapidly, and agricultural non-point source pollution has gradually become one of the main factors affecting the quality of water environment. Since the current agricultural non-point source pollution is random, intermittent, and wide-area, and there are complex physical, chemical, and biological processes in the transmission process of pollutants from pollution sources to ditches and rivers, it determines the agricultural non-point source pollution of the watershed. Difficulty in quantitative estimation of load into the lake. [0003]...

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Application Information

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IPC IPC(8): G06F19/00
Inventor 刘申刘宏斌雷秋良翟丽梅王洪媛武淑霞任天志李文超崔超
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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