Basin-scale underground-water-to-surface-water nitrogen transportation blockage preferential control region division method

Abstract

The invention provides a basin-scale underground-water-to-surface-water nitrogen transportation blockage preferential control region division method. The method comprises the steps: determining a preferential control region recognition target region in a research region according to an interaction relation of underground water and surface water; in the preferential control region recognition target region, dividing the grade of underground water nitrogen pollution to form an underground water nitrogen pollution grade division map, and performing underground water nitrogen pollution special vulnerability estimation and grade division to form an underground water nitrogen pollution special vulnerability grade division map; based on a GIS technique, performing map layer overlapping on the underground water nitrogen pollution grade division map and the underground water nitrogen pollution special vulnerability grade division map; further dividing the grade of an underground-water-to-surface-water nitrogen transportation blockage preferential control region to form a preferential control region grade division map. The basin-scale underground-water-to-surface-water nitrogen transportation blockage preferential control region division method implements the division of a basin-scale underground-water-to-surface-water nitrogen transportation blockage preferential control region.

Description

technical field [0001] The invention relates to a basin-scale method for dividing priority control areas for blocking nitrogen transport from groundwater to surface water, and belongs to the fields of water environment science and water resource management. Background technique [0002] Nitrogen exists widely in nature and is an important fertilizer for agricultural production and a basic nutrient element for the growth and survival of humans, animals and plants. Along with the rapid development of the breadth and intensity of agricultural activities and industrial activities, the equivalent of nitrogen input into the environment by humans is increasing day by day. The nitrogen pollution of water environment has become a global environmental problem, especially in my country. [0003] Nitrogen excretion from groundwater to surface water is an important but neglected nitrogen pollution pathway. Previous studies have shown that nitrogen pollutants carried by groundwater may a...

AI Technical Summary

Problems solved by technology

The invention makes up for the deficiency caused by neglecting the process of nitrogen pollution entering the surface water body with underground runoff in the prior art, and solves the problem of "how to identify and classify the high-risk areas of nitrogen discharge from groundwater to surface water from the basin scale"

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