Evaluation of River Ecological Sensitivity Based on GIS——Taking Kangwang River in Feicheng,Shandong Province,as An Example
In recent years,with the rapid development of urban construction,the unreasonable de-velopment and utilization of human beings lead to the increasing destruction of the river ecosystem.In order to better protect and manage the river ecological environment and improve the benefits of ur-ban river landscape,this paper takes the upper reaches of Kangwang River in Feicheng as the re-search object,select eight ecological factors,build the evaluation index system of ecological sensi-tivity in the upper reaches of Kangwang River in Feicheng based on RS,GIS technology and level a-nalysis to make a comprehensive evaluation of Kangwang River upstream river ecological sensitivity.The results show that the ecological sensitivity grade in the upper reaches of Kangwang River is mainly medium and high,and still evolves towards high sensitivity.The comprehensive ecological sensitivity of the upper reaches of Kangwang River is divided into five grades:extremely sensitive,high sensitive,medium sensitive,weak sensitive and insensitive,covering 11.85%,26.70%,27.15%,21.26%and 13.04%respectively.Among them,the area and proportion of the high,medium and weak sensitive areas occupy a large proportion,the high sensitive and medium sensitive areas are mainly distributed in the water body,canal and surrounding woodland and farmland areas,and the weak sensitive areas are mainly urban construction land.The distribution characteristics and the o-verall change trend of the sensitive areas in the upper reaches of Kangwang River were studied and the optimization suggestions were obtained,so as to provide a scientific basis for the ecological resto-ration and the sustainable development of the city.
urban riverecological sensitivityevaluationindex system
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