The Study On The Spatial Framework And Optimization Of "Three Types" Land Space In County-scale

As a county with a rapid economic development in Pingdingshan,Baofeng County was rich in mineral resources.However,there ware some problems in the process of rapid development:the urban and rural construction space and the agricultural production space constantly occupied the ecological protection space,and the three types of spatial land use structure ware not reasonable,The land intensive utilization degree of the urban and rural industrial and mining land was lower,the urbanization level was to be improved,the distribution of the rural residential areas was relatively decentralized,the intensive utilization degree of the rural construction land was not high,the land area was large,the location condition was poor,the terrain was complex,the soil layer was thin,The natural limiting factors such as large slope and the like ware large,and the development and utilization difficulty was high.on the basis of the above land With the problem,Baofeng County land space optimization was imminent.Taking Baofeng County as the research area,according to the principles of science,integrity,pertinence and local conditions,this paper delimited the rigid land space of Baofeng County.Then the urban and rural construction land from the natural factors and regional factors selected 9 evaluation indicators,agricultural production land from the agricultural production of natural factors,economic costs of agricultural development and agricultural development convenience and other aspects selected six evaluation indicators.The ecological protection land selected five evaluation indexes from the aspect of ecological function,constructed the evaluation index system of three kinds of spatial suitability in Baofeng County,and determined the index weight by using the analytic hierarchy process(AHP).The suitability evaluation model was constructed and the correlation data ware superimposed by Arcgis spatial analysis.Three kinds of spatial optimization results of Baofeng County ware obtained,which provided a certain reference basis for the territorial space optimization of Baofeng County.The main results ware as follows:(1)According to the principle of primary and secondary functions,according to the LUCIS method,the area with agricultural production as the dominant function was 499km2,accounting for 62.18%of the land space,and the ecological space area for agricultural construction was 399.65km2.The spatial area of agro-ecological construction was 6.83km2;The land space area with construction as the dominant function was 143.62km2,accounting for 19.89%of the total land space,of which,the area of constructing agricultural ecollogical space was 84.27km2 and the area of constructed ecological agricultural space was 59.35km2;The land space dominated by ecological functions has an area of 129.38 km2,accounting for 17.92%of the total land space.Among them,the area of eco-agricultural construction space was 103.1 km2,and the distribution of ecologically constructed agricultural space was relatively small,with an area of 26.28 km2.The proportion was 3.64%,which was the smallest of the six types of land space,and scattered in the eco-agricultural construction space.(2)Based on the superposition analysis of rigid land space and three kinds of land space based on suitability evaluation,the final optimization results of three types of space in Baofeng County ware obtained.The spatial area of agricultural production was 476.08km2,accounting for 65.94%of the total land area,and the,space area of urban and rural construction was 93.94km2,accounting for 13.01%of the total land area.The space area of ecological protection was 151.98 km2,accounting for 21.05%of the total land area.(3)Compared with the status quo of Baofeng County in 2016,the urban and rural construction space decreased by 8.53km2,the agricultural production space increased by 11.21km2,and the ecological protection space decreased by 2.68km2.(4)The relationship between agricultural production land,urban and rural construction land and ecological protection land in the same research area.In the optimization results,the ecological space and the urban and rural construction space ware reduced to some extent compared with the present situation,and the areas where the two decrease ware mainly distributed in Dayin Town,Lizhuang Township and Zhangbaqiao Town.These three villages and towns need to focus on the optimization of land space after suitability evaluation.