Study On River Health Evaluation In Xuzhou Section Of Yihe River

With the increasing frequency of human activities and the rapid growth of population,the degree of human disturbance to rivers has gradually increased,and the health problems of rivers have become increasingly apparent,and have attracted widespread attention worldwide.From the point of view of river protection and sustainable utilization of water resources,it is of great importance to establish a technical system for river health assessment,carry out systematic and comprehensive river health assessment,and construct a river management system based on river health assurance to improve and perfect River and lake evaluation and management,which is of great significance for protecting water resources of main rivers in Xuzhou City.In this paper,the health status of six main rivers in Xuzhou City,namely,Kuihe River,the Old Yellow River,Zhengji River,Shundi River,Bulao River and Fangting River,was studied,and a health evaluation system suitable for the main rivers in Xuzhou City was found.The specific conclusions are as follows:1.According to the existing definition of healthy river,a number of river health evaluation indicators are tentatively worked out.Through adjusting and supplementing indicators in time,the evaluation index system of main rivers health in Xuzhou City was established.According to the single evaluation index and the overall evaluation criteria,the river health level is divided into five grades:excellent,good,medium,poor and poor.The health status of the main rivers in Xuzhou is evaluated.2.According to the survey data of main rivers in Xuzhou City,the health level of corresponding rivers is determined by the current value of each evaluation index.By means of AHP comprehensive index method,the health status of main rivers in Xuzhou was evaluated,the proportion of each evaluation index was obtained,and the comprehensive health evaluation index of main rivers in Xuzhou was calculated.Based on the river health evaluation criteria,the health level of the main rivers in Xuzhou City was obtained by comparing the comprehensive evaluation index.3.By comparing and analyzing the results of health assessment,the main factors affecting river health are pointed out.Suggestions for the protection of main rivers in Xuzhou City are put forward,and corresponding plans and implementation schemes are worked out.