Drainage basin water quality comprehensive evaluation method and system

Abstract

The invention discloses a drainage basin water quality comprehensive evaluation method and system. A water quality comprehensive evaluation analysis model and a credibility distribution function are built, and a water quality index monitoring value is converted into the credibility of each evaluation level; on the basis of evidential reasoning combination rules and algorithms, indexes belonging tothe same evaluation level are subjected to evidence recursion synthesis, and probability distribution of each evaluation level is worked out; the utility theory is introduced, and water quality comparison is achieved. By building the water quality comprehensive evaluation analysis model and the credibility distribution function, water quality monitoring data normalization processing is achieved,the damage caused by a scoring method to source data information is avoided, processing of index monitoring values is more scientific and accurate, and the water quality condition can be better reflected; by adopting the evidential reasoning combination rules and the evidential reasoning algorithms, multi-index and multi-evaluation-level evidence synthesis is achieved, uncertain information processing is sufficiently considered, and the evaluation result better conforms to the actual condition.

Description

technical field [0001] The invention relates to a comprehensive evaluation model and realization method of water quality status in a river basin under the condition of multiple indicators and multiple evaluation evaluation levels. Background technique [0002] Water plays a vital role in social and economic development, but with the improvement of people's living standards and the rapid development of the national economy, the waste water, sewage, and runoff water produced are also increasing, and the supervision of waste water treatment and discharge is not in place. Leading to more and more water pollution problems. There are various factors of water pollution, and the evaluation factors of water quality in different river basins are also different. Multiple water quality evaluation indicators cannot scientifically and intuitively reflect the water quality status, and the affiliation relationship between each evaluation index and each evaluation level is very complicated. ...

AI Technical Summary

Problems solved by technology

There are three deficiencies in the existing water quality evaluation methods: First, when scholars normalize the water quality monitoring data, the monitoring values ​​of each indicator are not necessarily exactly equal to the limit value of a certain category, and the scoring method is not accurate enough ; Second, when evaluating multiple indicators, the weight of each indicator is determined by the expert suggestion method or the arithmetic mean method, which is subjective and cannot reflect the importance of the indicators scientifically; The monitoring data within, and the data is complete and definite, without considering the processing method of uncertain data and gap data

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