Research And Application Of Water Quality Evaluation Management System Based On Gray Relational Reasoning

With the development of society and economy,the water consumption of industry and agriculture and society has been increasing year by year,and the water consumption has also increased substantially.It is precisely because of human over-use of rivers and excessive discharge of pollutants,making the water quality of rivers and lakes deteriorating,affecting the safety of water supply.In order to fully understand the evolution process of water quality and quality of rivers and lakes,it is necessary to simulate and analyze the development trend of river water quality.This thesis takes Jiangxi province Liaohe River as the research object,through the comparative analysis method of gray relation analysis and case-based reasoning advantages and disadvantages,the gray relation analysis and case-based reasoning technology of two kinds of combination evaluation of Liaohe River water quality,and propose corresponding protection measures according to the present situation of water quality.The main work and achievements of the article are as follows:(1)Selecting the 15 indicators for screening object from eight rivers or reach in jiangxi province in 2011-2016.The evaluation factor was determined by using the comprehensive pollution index method and the pollution sharing rate of various indicators.(2)This thesis improves the traditional gray relational analysis method and adds the case-based reasoning technology.using case-based reasoning technology,analysis of factor similarity evaluation factor and the old instance already exists in the database of monitoring points of the evaluation of actual water quality,if the similarity is less than the threshold value is called gray correlation analysis method for water quality assessment,and the example of deposit to the case database.(3)Using "JAVA + MYSQL" build water quality evaluation management system,starting from the overall system design,analysis of the system design ideas and the introduction of each function module.At the same time,the index value of monitoring point of Liaohe River was input into the system for verification.The water quality of the monitoring point was evaluated to be level 3,and made certain explanation to the water quality control measures.