GRRM model-based groundwater environment risk evaluation method for hydrogeological unit

Abstract

The invention provides a GRRM model-based groundwater environment risk evaluation method for a hydrogeological unit. The method comprises the steps of performing risk source assignment according to a risk source type based on spatial distribution of a risk source through a hydrogeological division risk evaluation unit; by taking groundwater quality, groundwater level and groundwater source area sensitivity as risk suffers, calculating risk suffer sensitivity; determining damage degrees of the risk source to a groundwater system and the risk suffers, and obtaining an exposure response coefficient; calculating a groundwater anti-pollution performance index by integrating weighted hydrogeological parameters; and obtaining a groundwater relative risk evaluation result through relative risk model calculation, and performing representation on a groundwater environment in combination with the groundwater relative risk evaluation result. By obtaining the risk source assigned value of the risk evaluation unit, the risk suffer sensitivity, the exposure response coefficient and the groundwater anti-pollution performance index, the groundwater relative risk evaluation result can be comprehensively, quickly and accurately calculated and analyzed, so that the reliability of groundwater relative risk evaluation is improved.

Description

technical field [0001] The invention relates to the technical field of groundwater pollution analysis, in particular to a method for assessing groundwater environmental risks based on GRRM model hydrogeological units. Background technique [0002] In recent years, groundwater has been an important source of water supply in my country. According to the statistics of the "National Groundwater Pollution Prevention and Control Plan (2011-2020)", by 2009 the total amount of groundwater exploitation has reached 109.8 billion cubic meters, 65% of the domestic water in the northern region, 50 % of industrial water and 33% of agricultural irrigation water come from groundwater. Among the 655 cities in the country, more than 400 use groundwater as their drinking water source. At the same time, groundwater is also a common source of drinking water supply in rural areas of our country. Due to the substantial increase in the development and utilization of groundwater, large-scale exploita...

AI Technical Summary

Problems solved by technology

The disorderly discharge of domestic sewage in cities and towns, the excessive use of pesticides and fertilizers, and the discharge of a large amount of industrial waste water have already made and are making many precious groundwater resources unusable due to pollution.

The groundwater environment is concealed and complex. The damage to the ecological environment and the harm to human health caused by groundwater pollution have long lacked due attention and have become a major challenge to the sustainable development of society and economy.

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