| In recent years,the social and economic development of karst areas has been rapidly improved.With the continuous development of cities and industries,a large number of people have influxed.This not only increases the demand for land,occupies part of the cultivated land and ecological land,but also gradually shifts land development and construction to higher altitudes.Slope area.These problems not only make the problems of rocky desertification,soil erosion and geological disasters in the karst area more serious,but also gradually form problems such as the extensive urban expansion,the deterioration of the ecological environment,and the scarcity of high-quality farmland.In the context of the 18 th National Congress of the Communist Party of China(CPC),which proposed to optimize the spatial planning of "Production-Living-Ecological" space,this paper uses the research results of "Production-Living-Ecological" space at home and abroad for reference,and based on the dominant function of land use,preliminarily establishes the spatial classification system of "Production-Living-Ecological" space in karst areas.Duyun City,located in the Karst County area,is selected as the research area to study the spatial status,spatial distribution characteristics and dynamic changes of "Production-Living-Ecological" space in Duyun City Based on 2009,2014 and 2018 land use data,GIS spatial analysis,transformation model,Lorenz curve and other relevant mathematical models.Based on the "Production-Living-Ecological" space division,combined with the regional ecological environment,economic humanities and other related index structures,a suitability evaluation system is constructed,and mathematical models such as analytic hierarchy process are used to calculate the suitability evaluation results of production,living,and ecological space in the area,And divide the suitability evaluation level.Finally,based on the urban planning of the research area,the status of the "Production-Living-Ecological" space and the results of suitability evaluation,the "Production-Living-Ecological" space in the research area was optimized,and suggestions for the development of the "Production-Living-Ecological" space were proposed.The research results are of great significance and promotion to regional ecological environmental protection,land and space planning,and resource conservation.The main findings are as follows:(1)The "Production-Living-Ecological" space in Duyun City is mainly dominated by ecological space,with an ecological space area of158,126.30 hm2,accounting for 69.19% of the total land area,which is relatively high;followed by production space,with an area of 61406.75hm2,accounting for 26.87% And the living space is relatively small,with an area of 9013.86 hm2,only 3.94% of the total land area.From the perspective of the composition of the three living spaces in each township,Yundong Town and Mochong Town are relatively high in production space;Yundong Town,Shabaobao Street,and Xiaoweizhai Street are relatively high in living space;ecological space is relatively high The towns are Pinglang,Yundong and Mochong.From the perspective of the characteristics of spatial diversification,the higher diversification index is mainly Guanghui Street and Shabaobao Street;the most dominant ones are mainly Pinglang Town and Mochong Town;the more uniform ones are mainly Shabaobao Street and Guanghui Street.(2)The spatial distribution of the "Production-Living-Ecological" in the study area is affected to some extent by taking elevation,slope,aspect,and topographical position.Judging from the spatial dynamics of2009-2018,the overall production and ecological lands have shown a significant downward trend and the living space has shown an upward trend.From the perspective of spatial transfer,the increase in urban and rural living space area comes from agricultural production space and forest land ecology space.From the 2009-2018 Lorentz curve,Gini coefficient and location entropy,the ecological space and production space Lorentz curve is closer to the absolute average and the distribution is relatively balanced,while the living space is farther away from the absolute average and the distribution of living space is basically reasonable.(3)The most suitable living space in Duyun City is mainly distributed in Wenfeng Street,Guanghui Street,Dudong Town,and Shabaobao Street in the eastern part of Duyun City.Areas suitable for production space are mainly distributed in Yundong Town,Mochong Town,Xiaoweizhai Street and Shabaopu Street.The most suitable ecological space is mainly concentrated in Pinglang Town,Maojian Town,and Luyinhu Street in the west of the study area.Based on the suitability evaluation results and existing planning,the status of the "Production-Living-Ecological" space was optimized.After optimization,the production space area of Duyun City was 61932.23 hm2,the living space area was 10084.98 hm2,and the ecological space area was156529.7 hm2.After optimization,the distribution of living space in Duyun City is basically reasonable.After the ecological space and living space are optimized,the spatial distribution is even. |
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