Underground water quality evaluation method based on index classification

Abstract

The invention discloses a groundwater quality evaluation method based on index classification. The groundwater quality evaluation method comprises the following steps: S1, expanding groundwater quality grading according to an existing water quality index standard and setting an index upper limit of each type of water, S2, converting the measured value of the water quality index into a dimensionless single evaluation index to obtain a new groundwater quality grading interval, S3, respectively constructing a physical index model, a chemical index model and a biological index model for water quality evaluation, S4, constructing a water quality comprehensive index model by utilizing an index maximum value in the constructed physical index model, the constructed chemical index model and the constructed biological index model, and S5, querying a new underground water quality grading interval to which the to-be-evaluated water sample belongs according to the water quality comprehensive indexmodel of the to-be-evaluated water sample. According to the method, the defect of a single result of single index evaluation is overcome, and different index weights are distributed according to different pollution hazard degrees of different evaluation indexes to the water, so that the evaluation result is scientific and reasonable.

Description

technical field [0001] The invention relates to the technical field of water quality evaluation, and more specifically, to a groundwater quality evaluation method based on index classification. Background technique [0002] The focus of groundwater quality evaluation is to accurately determine the level of water quality and quantitatively reflect the main indicators of polluted water bodies. The new 2017 version of "Groundwater Quality Standards" (GBT 14848-2017) further increases the water quality evaluation indicators, from 39 to There are 93 items, which greatly increases the complexity of water quality evaluation; establishing a water quality evaluation method compatible with the new standard has great practical significance. The current water quality evaluation mainly includes the following methods: comprehensive index method, general statistical method, fuzzy mathematics method, and gray correlation method. Based on the above water quality evaluation methods, there are...

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Problems solved by technology

[0005] The present invention provides a groundwater quality evaluation method based on index classification in order to overcome the defects of single water quality evaluation index and unreasonable evaluation index weight in the above-mentioned prior art

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