Research On Health Evaluation Of Mayi River In Yanshou Section Under The River Length System

Rivers not only play an important role in ensuring people’s lives,but also are the foundation of economic development.But in the whole world,with the rapid development of urbanization,river water resources shortage,water ecological deterioration,hydrological conditions change and other dangerous situations occur frequently,most rivers have health problems,so it is urgent to carry out river health assessment research.The river chief system is an important system guarantee for river management and protection.In this paper,under the river chief system,taking the Yanshou section of the Ant River as the research object,in-depth research has been carried out in the research area to collect the specific situation of the Yanshou section of the Ant River,and to understand the situation of the river basin and operation management from the staff of the relevant work units,and to analyze the basic situation of the river basin based on the text data and the results of the field investigation Based on the nderstanding of the principles of river health evaluation,the weight of each index is reasonably determined,and the comprehensive evaluation of the Yanshou section of the Ant River is carried out.The main contents are as follows:The first part mainly introduces the research background,significance and technical route of river health assessment.The second part mainly introduces the general situation of the Yanshou section of the Ant River,mainly including the hydrological and water resources,water quality,riparian status,biological survey and social services.In the third part,based on the theories and methods of river and lake health evaluation at home and abroad and the principles of constructing relevant indicators,a relatively complete and operational river health evaluation system is established for the Yanshou section of the Ant River by analyzing the characteristics of its own watershed,and then the calculation and scoring methods of evaluation indicators are developedaccording to the national standards,and the scoring standards of indicator health evaluation are established,Through the index fuzzy evaluation method to establish the evaluation model.The fourth part is mainly from the general situation of each criterion layer of the Yanshou section of the Ant River.Then,with the support of the data,it calculates each index of the Yanshou section of the Ant River according to the evaluation index system constructed above and the evaluation scoring standard formulated.The results make a comprehensive evaluation of the health of the Yanshou section of the Ant River according to the expert scoring and the weight ratio.The final results show that the overall health status of the Yanshou section of the Ant River belongs to the health status,but some indicators are below the health level through the evaluation and analysis,which need to be treated and ecological restoration.The fifth part summarizes the content of the paper,and points out the shortcomings of the paper objectively.