Study on river health and its comprehensive assessment——a case of Wuliehe River in Chengde

Based on the relevant study achievements at home and abroad,the concept and connotation of river health are analyzed herein,and then the factors such as the river geomorphology,water quantity,water quality,water-sediment,aquatic ecology,riparian zone,socio-economics,etc.are comprehensively analyzed from the aspects of the fundamental environment of river corridor,eco-support function of and the socio-economic service function of river;from which an index system for the comprehensive assessment on river health is established.Under the consideration of the fuzziness of the concept of river health,the variable fuzzy assessment method is applied to the assessment on the river health,furthermore,an analysis is made by taking the reach from Gaoshitai to Luanhe River Estuary of Wuliehe River as an actual case.The application result shows that the assessment system can not only identify the river health status effectively,but can also provide a technical basis for the river management concerned.