Method for evaluating functional indexes of urban internal lake water environment based on grey cluster analytic method

Abstract

The invention relates to a method for evaluating functional indexes of an urban internal lake water environment based on a grey cluster analytic method. The method comprises the following steps: by taking an urban internal lake as a research object, combining a surface water environment quality standard (GB3838-2002) and a municipal sewage treatment plant pollution discharge standard (GB18918-2002) to form a novel grading evaluation standard of the water body quality, and selecting two indexes such as TN and TP with common requirements as basic factors of evaluating the current situation of the water quality; and meanwhile, performing mathematical analysis on continuous monitoring data of the water body quality and the index limit value in the evaluation standard by adopting a grey cluster analytic method. On one hand, the uncertainty and imperfection of the field monitoring data are corrected; on the other hand, the monitoring data and the evaluation indexes are subjected to fitting comparison, and a novel method for evaluating the functional indexes of the urban internal lake water environment is established. According to the method disclosed by the invention, the nutrient pollution conditions of the urban internal lake can be judged, the water body pollutant enrichment tendency is obtained, and a basis is provided for water environment treatment.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, and in particular relates to an evaluation method for urban lake water environment function indicators based on a gray clustering analysis method. Background technique [0002] With the construction of ecological cities in the process of urbanization, urban inner lakes have become an important part of urban water environment, with important ecological functions, aesthetic value and economic value. Most of them are near-enclosed still or slow-flowing water bodies, especially urban landscape water bodies, which generally have high pollution loads and poor self-purification ability of water bodies. The input of exogenous pollutants leads to serious eutrophication and black odor of water bodies. Especially for small and medium-sized landscape water bodies in cities, the water quality standards are not clear and there is a lack of targeted management standards. At present, the common...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of evaluation method of urban inner lake water environment function index based on gray clustering analysis method, by combining surface water environmental quality standard (GB3838-2002) with urban sewage treatment plant Pollutant discharge standards (GB18918-2002) combined to form a new standard for grading and evaluating water quality, and the two indicators of TN and TP, which have common requirements in the two standards, are used as the basic factors for evaluating the current status of water quality; at the same time, the gray cluster analysis method is adopted Mathematically analyze the continuous monitoring data of water quality and the index limit value in the evaluation standard. On the one hand, the uncertainty and incompleteness of the on-site monitoring data are corrected, and on the other hand, the monitoring data is compared with the evaluation index. , to establish a new method for the evaluation of urban lake water environment function indicators

Images