| Faced with the series of resources and environment problems,which were degradation of ecosystem function,rocky desertification and soil erosion,excessive reduction of arable land,exhaustion of resources,environmental pollution and land space disordered development and other problems in Karst mountainous area.With guidance of "development and ecology" concepts in main functional areas of Guizhou Province,the Karst landforms county--Panxian were selected as the study area,and 5 suitability factors of topography,traffic,location advantage,population density and economic development level,as well as 5 constraint factors of natural disasters and land resources and utilization water resources and environmental capacity which made of spatial development suitability evaluation index system in Karst mountainous area,the Arcmap superposition method and the mathematical evaluation model was used in spatial development suitability evaluation of Panxian county,afterwards the Panxian urban region,agricultural and ecological space was divided,and putted forward three kinds of development patterns and spatial development direction in Panxian county.It was of great significance to promote the efficient and intensive land space usage,optimize the spatial pattern of land development and promote the sustainable development in Panxian county territory.The main results were as follows:(1)Spatial development suitability in Panxian county were divided into 4 grades which were suitable,relatively suitable,relatively unsuitable and unsuitable,the suitable development area was 365.46 km2,accounting for 9.01% of county area;relatively suitable development area was 607.30 km2,accounting for 14.97% of county area;the relatively unsuitable development area was 97.78 km2,which accounting for 2.14% of county area;the unsuitable development area was 2985.46 km2,accounting for 73.61% of county area.As a whole,the proportion of construction land in the whole county was small,and its distribution was relatively concentrated,which was concentrated in the Hongguo urban area,old town of Panxian,Baishu-Jichangping,Baotian Town and so on.(2)Urban development space area in Panxian county was 307.44 km2,which accounting for 7.58% of county land area.Agricultural production space was 1505.18 km2,and accounting for 37.11% of county land area.Ecological protection space was 2243.37 km2,accounting for 55.31% of county land area.Panxian urban space basic with appropriate development zones were basically same,the agricultural space also agreement with relatively suitable,relatively unsuitable area,but the consistency was weaker than other two regions.ecological space with unsuitable area was roughly consistent.(3)"One main two assistants,Cross County gathered" town development pattern,"four areas and many points" modern mountain efficient agriculture development pattern,"three screen,three corridors,many patches of ecological security pattern were constructed.According to the development and protection direction of three kinds of space “town,agriculture and ecology”,the paper putted forward the development direction of urbanization,agriculture and ecological environment protection with Panxian county's characteristics. |
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