Multi-index coupled surface type water source safety risk assessment method

Abstract

The invention discloses a multi-index coupled surface type water source safety risk assessment method, and belongs to the technical field of drinking water source protection risk assessment. The method comprises the following steps of: (1) comprehensively evaluating the water quality of a surface type water source by adopting an artificial neural network model; (2) evaluating the health risk of the surface type water source by adopting a health risk evaluation method recommended by USEPA (United States Environmental Protection Agency); (3) according to the pollution occurrence frequency and existence time, carrying out water pollution risk evaluation on the surface type water source; and (4) calculating the weights of the indexes in water safety risk evaluation by adopting an analytic hierarchy process, and performing water safety risk evaluation on the surface type water source. Scientific and comprehensive water safety evaluation is carried out for the surface type water source, related departments are guided to carry out effective water source protection measures, drinking water safety of people is guaranteed, and economic and social development is promoted.

Description

technical field [0001] The invention relates to a risk assessment model and a realization method for water quality risk assessment of drinking water source water basin surface type under the condition of multiple indicators and multiple assessment levels. Background technique [0002] The problem of water environment in today's society is serious. Due to the increase of sewage and wastewater discharge, the destruction of the ecological environment and the inadequate treatment of domestic garbage, there are more and more water pollution problems, resulting in the water quality of surface water sources being polluted to varying degrees. There are various factors of water source pollution, and the risks of water quality assessment in different water source areas are also different. It is not scientific and intuitive to carry out risk assessment of water source areas with a single or multiple water quality indicators, and the non-linear relationship between various water quality ...

AI Technical Summary

Problems solved by technology

There are various factors of water source pollution, and the risks of water quality assessment in different water source areas are also different. It is not scientific and intuitive to conduct risk assessment of water source areas with a single or multiple water quality indicators, and the nonlinear relationship between various water quality indicators cannot be accurate. expression, and the affiliation relationship between each evaluation index and evaluation level is very complicated, and there is no unified processing method at present

[0003] my country's "Surface Water Environmental Quality Standards (GB3838-2002)" adopts a single-factor evaluation method, which takes the worst water quality index as the final evaluation result. Although the evaluation is strict, it lacks scientific and comprehensive consideration, and the evaluation result is too Conservative, unable to distinguish between water quality of the same category

Existing water quality evaluation methods do not take into account the relationship between various water quality indicators. For the weight distribution problem, the scoring method is often used, which is not accurate enough.

[0004] For the risk assessment of water quality safety in surface water sources, the existing technology is relatively single, mainly using the subjective evaluation of the evaluator, which often misses some key factors, and is greatly affected by personal subjective feelings, and the evaluation results lack objective accuracy

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