Research On Ecosystem Health Evaluation, Restoration And Service Value Of Xiao-qing River In Jinan City

With the rapid expansion of population and the development of economy since 1950s, the big problems related to water resource, water environment and ecology have been increasingly important,which concern the existence of human being itself and became the highly focused worldwide issues.In our country, the rapid development of water pollution and the imbalance of water ecology in a certain regions since 1980s have badly affected the sustainable development of society and economy.Therefore, the protection and restoration of water ecosystem has became a development stradegy of our country.Based on former research results of river ecosystem health and it's evaluation, river restoration technologies and ecosystem service value, researches on Xiao-qing River of Jinan city were started.Main contents and achievement s are as follows:(1) Research progress about river ecosystem health evaluation, restoration and ecosystem service value was summed up. The ecosystem current situation of Xiao-qing River was investigated.(2) Based on our nation's conditions and the characters of Xiao-qing River, it proposed the principles when selecting river health indices.According to the current river health status of Xiao-qing River, it constructed thirteen specific indices that reflected water entironment, river structure, bank status,river social economy function in different layers and classes.It also put forward the assessment method of each index and five grades of standard character values.Thinking of the fuzziness of river healht, it fixed index weight through layered binary compared expert analysis mehtod, and valuated river health by multi-objective variable fuzzy model.It concluded that the ecology system health level of Xiao-qing River is unhealthy and protective and restoration measures shoud be taken.(3)According to the current situation of ecosystem and the comprehensive treatment plan of Xiao-qing River, mechanical and biological restoration measures were preliminary designed.(4)Based on the comprehensive treatment plan of Xiao-qing River, the ecosystem service function was divided by ecological economics methods.The ecology benefit of the rehabilitated Xiao-qing River was quantized.The assessment of river ecosystem value helps people to macroscopically know the huge ecological ,social and economic benefits which was brought about by the comprehensive treatment of Xiao-qing River.It provides foundation for policy of ecological compensation and national economic accounting system including ecological value. It is advantageous to the sustainable development of ecology ,economy and society of Jinan city.