The Assessment And Research Of The Majia River’ Health

River water ecological environment problems has drawn great attention of people more and more, The Majia river is an important river, haihe river basin is one of the know Majia river health status of the river, for its benign operation or further comprehensive control to provide technical reference.In this paper, the main research contents and results are as follows:1、Refer to the river health evaluation of relevant research literature at home and abroad, to understand the research status of river health assessment,and research object Majia river, this paper compares and analyzes the assessment technology for river health evaluation of Majia river course and evaluation index system.2、According to the river health evaluation system at home and abroad and its related content, construct the horse Majia river river health evaluation index system, the application of expert consultation method and analytic hierarchy process (ahp) to establish the evaluation index system. Fully considering the diversity and dynamics of basin area, comprehensive domestic and foreign existing research results of theoretical system of river health assessment of the related parameters of the haihe river basin in shandong section of the horse and the actual situation of Majia river, the river health evaluation grade standard is determined.3、Draw lessons from the research achievements of predecessors and the specific information of Majia river, constructing the multi-level and multi-objective evaluation Majia river model of river health.4、The Majia river are analyzed based on the measured data Majia river the space-time change of water quality of typical section of the river, mainly including spatial and temporal variations of different section of the same element and the temporal variation characteristics of different elements on the same section.5、Take the projection pursuit model to calculate the horse Majia river river health evaluation of the objective function, using genetic algorithm to find the optimal solution, and find out the optimal direction, then calculate the influence extent of each index of different cross section on the river finally calculate the water quality situation of each section. By using the projection pursuit model and the combination of the analytic hierarchy process (ahp) to calculate,the selected typical cross section of the health results are obtained.