Urban Area,Agricultural Area And Ecological Area's Space Identity And Spatial Pattern Of Xishui County

In recent years,natural and social economic pattern has been changed,resulted in a series of regional problems accumulated,and increasing contradiction of social economy and resource environment.While Human and nature in harmony has been damaged in certain extent.As a ecological function area in nation,Xishui county is an important area to protect national ecological security and it's the demonstration area of harmony between human and nature.Using the space analysis method,the methods of spatial overlay and statistical analysis of space to evaluate the suitability of space exploitation,combined with the present situation of the surface and correlation is used to identify the space vector data,the three types of space division of ecological function areas has important significance.Taking Xishui county as study area in the research and analysis the following researches are made by the author:(1)Determine the space division method of urban area,agricultural area and ecological area,on the basis of analysis space division of research at home and abroad.(2)Selected population density,economic development level,land use intensity,traffic dominance,available land resources,available water resources,risk degree of natural disasters and environmental capacity to evaluate Xishui 's spatial development suitability.Then using the analytic hierarchy process(AHP)to determine index weight,and analyze the Xishui county space development suitability.Using the suitability evaluation results of space exploitation to identify suitable development,relatively suitable development,relatively unsuitable development and unsuitable development area.(3)Using the suitability evaluation results of space exploitation and the present situation of the surface to identify the preliminary evaluation area.Using the founction of spatial analysis.of ArcGIS to cover the vector data of Space exploitation negative list and basic farmland,in order to identify the urban area,agricultural are.a and ecological area of Xishui county.(4)Using the area recognition results to research the spatial development direction and put forward the de'velopment proposal of Xishui county.The main conclusions are as follows:(1)Urban area covers an area of 121.46 km2,which accounting for 6.2%of the county.Urban area compares with the suitable development area with high consistency,and compares with the land use intensity evaluation result,land use intensity of urban area at higher level.Agricultural area covers an area of 799.31km2,accounting for 40.8%of the county,which distributed is relatively loose.Ecological area covers an area of 1038.32km2,which accounting for 53%of the county.Ecological area compares with the relatively unsuitable development and unsuitable development area with high consistency,and compares with the land use intensity evaluation result,land use intensity of ecological area at lower level.But the land use intensity of Bahe town center area is higher.(2)The urban area's core of the development area located in the seat of government in Xishui county and its surrounding areas,and the center of Sanhua and its surrounding areas.Urban area's point development area located in Tuanpi,Xima and Dingsidang county.Such as development of combining centralization and decentralization.The agricultural area are constructed by the northern forest agricultural development area of Guankou,Tuanpi,Lvyang,Caihe and Bailian,the central hilly land ecological agriculture area of Dingsidang,Qingquan,Wanggang,Zhuwa and southern region around the river agricultural area of Bahe,Lanxi and Sanhua.The ecological area should build the main of HuaGui mountain of northern ecological construction area,the main of the southern Yangtze river of southern Yangtze river ecological construction area,the Bahe ecological construction area along Bahe river and the Xishui ecological construction area along Xishui river.