The Change Of Wetland Land Use And Evaluate Its Ecological Carrying Capacity

Land use change is the embodiments of human social activities are closely related with land use changes,changes in the structure and function of land ecosystem.Wetland is one of the world's three major ecosystems,in the dual pressure of population explosion and economic development,in late twentieth Century,a large number of wetlands have been converted into farmland,resource development and pollution over plus,the wetland area reduced greatly,wetland species were seriously damaged.Therefore,study on Shengjin Lake Wetland Land Use Change and its ecological carrying capacity have important academic and practical significance.This paper choose Shengjin Lake as the study area,combined with RS,GIS,1986,1995,2000,2004 and 2011 years of land use information of Shengjin Lake,land use and landscape pattern change in recent twenty-six years.The model of ecological footprint calculation based on improved,Shengjin Lake ecological footprint in different periods,and the use of ecological carrying capacity evaluation model of ecological carrying capacity of Jinhu,the final analysis of land use change and ecological carrying capacity in response to the combined with SPSS software.The main results are as follows:(1)Establish in Shengjin Lake land use database of 1986,1995,2000,2004 and 2011 through the interpretation of remote sensing images.(2)In recent twenty years in Shengjin Lake use change the results of the study show that:the cultivated land area of various types of land in the area to reduce the most,a decrease of 13.81%;water area increased by 5.52% at most.1995-2000 dynamic degree has a larger field,traffic land dynamic degree;2000-2004 has a larger,grassland,unused land and forest;2004-2011,garden land,unused land dynamic degree is bigger.2000-2004 years and 2001-2011 years,the land use degree increased;the period of land use in the period of development.Whereas 1995-2000 apprentice utilization decreased;the period of land use out of recession.However,from the overall look 1986-2011 years,the extent of land use change is declining trend.Structure information entropy increased from 0.9 in 1986 to 1.31 in 1995,and then decreased to 1.15 in 2004,then increased to 1.41 in 2011;the landscape fragmentation degree and patch shape irregular exacerbation.(3)Improved ecological footprint model,evaluation of different period or for Jinhu ecological carrying capacity of the ecological footprint per capita: Nearly 20 years,The per capita ecological footprint per capita growth of 0.31 square kilometers and Growth of0.0.29 per square kilometer per capita ecological carrying capacity.Ecological deficit was first increased and then decreased;in recent years,Jinhu ecological environment is good,but not stable enough.The ecological carrying capacity is positively related to the quantity of the birds.(4)Fitting up linear change and ecological carrying capacity of Jinhu land use change in the regression equation,the result shows that the two are consistent trend,and land use change on the ecological carrying capacity plays a significant role in promoting.