Analysis On Time Space Process And Driving Factors For Ecological Land Loss In The Urban Circle Of Wuhan

During the process of urbanization,the loss of ecological land will not only influences the biological safety of the regional area,but also has important influence to ecological civilization construction of city.Since approved as “National Resource Saving and Environment Friendly Type Social Construction Comprehensive Reform Pilot Area” by the State of Council,Wuhan city circle is developing quickly,and the variation of ecological land during rapid urbanization has become a typical problem.Under this background,the article,based on the remote sensing image data and using RS and GIS technical method,performs some initial research on time space rule and driving factor for ecological loss during development process of Wuhan city circle,and the results are as the following :(1)The total loss of Wuhan city circle is 91112hm2 during 2000 to 2015 year,with annual average loss 6074.33 hm2,and since 2007,the loss of ecological land is speeding up;(2)From the point of transfer matrix of land loss,ecological land such as water body,forest,grass land are being transferred to city construction,among which the transfer amount of water body is the most,next is forest land,grass land and unutilized land(3)there is obvious differences for the ecological land loss on space pattern.The scale of ecological land loss for Wuhan is “unutilized land>water body>forest land>grass land”;Xianning is “water body>unutilized land>grassland>forest land”;Huangshi is “unutilized land>grassland>forest land>water body”;Huanggang is “unutilized land >water body>grassland>forest land”;Xiaogan is “unutilized land>grassland>water body>forest land”;Ezhou is “water body>forest land>unutilized land>grassland”;Tianmen is “water body>grassland>forest land>unutilized land”;Qianjiang is “forest land>water body>grass land=unutilized”;Xiantao is “water body>forest land >grass land=unutilized land”;(4)The loss of ecological land is relevant to urban population density,urban construction size and per capita factors,resulting from many factor,but there are difference for main driving factors in different cities.