A method for identifying risks of agricultural non-point source pollution

Abstract

The invention discloses an agricultural non-point source pollution risk identification method. The method comprises the following steps: 1) measuring the numerical value of each index in a risk identification index system of an object region; 2) calculating the weight of each index value in the risk identification index system, obtaining the weight, and recording the weight as W; assigning each index in the risk identification index system to obtain an index assignment, and recording the index assignment as I; 3) substituting the weight W and the index assignment I into the following formula (1) to obtain an agricultural non-point source pollution risk index; wherein NPSPRI = [sigma] Wi * Ii; In the formula, NPSPRI is an agricultural non-point source pollution risk index; Wherein Wi is theweight value of each risk index in the index system, and the value range is 0-1; wherein Ii is an index assignment, and i is an index in an index system; aAnd identifying the agricultural non-point source pollution risk according to the calculated agricultural non-point source pollution risk index value. The method is simple, fast, low in cost and high in adaptability, does not depend on high-precision equipment and technologies such as a GIS and a remote sensing technology, and can very accurately identify the agricultural non-point source pollution risk.

Description

technical field [0001] The invention relates to a method for identifying risks of agricultural non-point source pollution, belonging to the field of early warning of potential risks of agricultural pollution. Background technique [0002] At present, agricultural non-point source pollution is widespread and massive, and the pollution sources are scattered and hidden. The time and space of pollution occurrence are random and uncertain, and it is difficult to monitor and control them. Identifying the key source areas and high-risk areas of agricultural non-point source pollution, and investing limited resources in areas with the greatest possibility of harm to water bodies but relatively small areas for key governance can greatly reduce the difficulty of governance and improve governance effectiveness. Therefore, establishing a risk identification method for agricultural non-point source pollution is an urgent task for the management and control of agricultural non-point sourc...

AI Technical Summary

Problems solved by technology

However, there are problems in the conventional agricultural non-point source pollution risk index system method, such as few pollution source classifications, incomplete index selection, and too rough research units.

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