The Impacts Of Human Disturbance On Ecological Health Of Hanjiang Basin

Environment is not only the basic condition for human's living and development, but the foundation for an Economic society to develop. With the increasing of human activity, Human activities have broken the natural ecosystems of the virtuous circle structure. The relationship between the material cycle, energy flow and message delivery of ecosystem have been disturbed, caused the ecosystem resources and environment growing to a big problem. Degradation of soil erosion, land desertification, soil pollution, the quality of degradation of arable land which has made the quality of agricultural products and Land productivity declining. It is significance for evaluating Agro-ecological health.On the basis of knowing the domestic and foreign study on the evaluation of ecological health, this article analyzed and summarized the successful experience and existed problem, proposed the concept of ecological health, and pointed the important of the agro-ecological health evaluation of Hanjiang basin. Constructing agricultural ecological health evaluation index system which be used for evaluate ecological health of land use of agricultural. A reference of the ecological security evaluation is given by this case. There are five components of the paper; the main contents of each department are as follows:The first part deals with exordium. It explains the paper research background; the present situation of domestic and foreign research; the research object; the research significance; the research content; the research mentality and the research method.The second part deals with the ecological health and human disturbance theory. By summing up the research evolvement and existed problem of ecological health, it brings forward the concept of agro-ecological health, the nature of agro-ecosystem and the state of agro-ecological, including several kinds of common jamming types.The third part is a case study. This article takes the land use situation at the year of 1999 and 2005 of the city such as Wuhan, Tianmen, Xiantao, and Yingcheng Hanchuan. Firstly, it analyzes the general situation of these areas, determine the field of ecological security evaluation index, calculated the ecological health in study areas.The forth part is conclusion, the innovation point existed problem; the further studies direction.