Method for determining drainage basin surface source pollution load of semi-humid region

Abstract

The invention discloses a method for determining the drainage basin surface source pollution load of a semi-humid region, belonging to the field of pollution control. The method comprises the following steps of: (A) collecting and sorting hydro meteorology and water environmental history observational data and wild experimental data; (B) dividing a sub drainage basin and a hydrological response unit; (C) improving a hydrological module; (D) calculating a soil erosion amount by using an MUSLE (Modified Universal Soil Loss Equation); (E) calculating a surface source pollution load; and (F) comparing a hydrological process and the surface source pollution load which are obtained through calculation with actually measured data; and determining the parameter values of the hydrological module, the MUSLE and a water pollution load metering module, so as to establish a model. With the adoption of the method provided by the invention, the surface source pollution load of the typical area of the Huai river basin in a semi-humid region can be effectively simulated; the reasonable and scientific calculation result is given; the popularization and the effectiveness of the model application can be improved; and a water environment research project, such as water environment protection and water pollution control, can be served well.

Description

technical field [0001] The present invention relates to a method for determining the non-point source pollution load of a watershed in a semi-humid area, specifically, a method for calculating non-point source pollution by improving the hydrological module in the original non-point source pollution load model to accurately reflect the hydrological process in the semi-humid area A numerical simulation method that improves the calculation accuracy of non-point source pollution loads in watersheds. Background technique [0002] At present, studies in many developed countries have confirmed that non-point source pollution is one of the main reasons for the deterioration of the water environment. According to reports from the United States, Japan and other countries, even after point source pollution is fully controlled, the water quality compliance rate of rivers is only 65%, that of lakes is 42%, and that of sea areas is 78%. Studies have pointed out that the non-point source ...

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Problems solved by technology

[0010] Aiming at the deficiency that the research model of the non-point source pollution load of the watershed in the semi-humid area of ​​my country can not accurately reflect the changing law of the hydrological process in the semi-humid area of ​​my country in the prior art, the present invention provides a non-point source of the watershed suitable for the semi-humid area The determination method of pollution load, which can effectively simulate the estimation of non-point source pollution load in the typical areas of the Huaihe River Basin in semi-humid areas, and provide reasonable and scientific calculation results for the unique hydrological characteristics of semi-humid areas, which improves the popularity and reliability of model applications. Effectiveness, can better serve water environment research projects such as water environment protection and water pollution control

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