Spatial And Temporal Evolution And Driving Factors Of "Production,Life And Ecology Space" Based On GIS In Watershed Scale

The 18 th National Congress of the Party put forward "promoting intensive and efficient production space,suitable living space,beautiful ecological space "(" Production,Life and Ecology Space "),the research on “Production,Life and Ecology Space”(PLE Space)has become a new direction of the research of land utilization change in China.Nanliu River Basin,as the largest sea-oriented river basin in Beibu Gulf Economic Zone,is the key area of economic development and environmental protection in Guangxi.The research on the evolution characteristics and driving factors of "PLE Space" from 2000 to 2015 is of great significance to the land space planning of Nanliu River Basin.In this paper,the author researched and analyzed the identification,evolution and driving factors of the "PLE Space" in Nanliu River Basin by the methods and theories of ecology,economics,statistics,land science and geographic information system,identified quantitatively the land dominated with "PLE Space" by taking the ecological interpreted data in 2000,2010 and2015 as the main data support and by equivalence table,biophysical process calculation and value substitution,established "PLE Space" classification system in combination with the qualitative identification results,analyzed the evolution features of "PLE Space" by Gini coefficient analysis,transfer matrix analysis and landscape pattern analysis,Using Arc GIS to superimpose the "PLE Space" change map area and geographical location factors,And analyze the influence of geographic location,policy and socio-economic driving factors on the evolution direction and law of the "PLE Space" in the Nanliu River Basin.Through the research mentioned above,the author made the main conclusions as follows:(1)The comprehensive quantitative classification methods such as equivalence table,biophysical process measurement and value substitution can accurately and effectively classify "PLE Space".On the basis of the results of ecological interpretation in 2000,2010 and 2015,the author compared the results of quantitative identification of "PLE Space" with the results of previous qualitative identification,comprehensively determined the classification system of "PLE Space",and divided "PLE Space" into urban life space,rural life space,agricultural production space,industrial and mining production space,waters ecological space and green ecological space.(2)In the process of urbanization,the life space in development in Nanliu River Basin havebeen concentrated in a Urban area,Green ecological space shrinks first and then expands,Agricultural production space is gradually eroded by living space.From 2000 to 2015,the PLE space were well distributed on sub-basin,and the local life space in development tended to be balanced while the urban life space in development and construction were gradually concentrated in the central urban area in the middle of the upper reaches and the coastal traffic arteries in the lower reaches;among the PLE space,the area of urban life space and rural life space was greatly increased and that of Green ecological space is steadily recovering under the policy of returning farmland to forest,agricultural production space was greatly decreased,which is the main feature of the research zone;in the research zone,the change of pattern spots is intense,the degree of fragmentation is deeper,the richness of landscape is reduced and the dominance of single landscape type is increased.(3)The administrative center has an attractive effect on production space and living space,but has an exclusive effect on ecological space.As the distance from the railway increases,the area of the newly added tiles in the production space gradually increases,the area of the reduced tiles in the ecological space gradually decreases,and the area of the newly added tiles in the living spaces gradually decreases.The farther away from the provincial road,the area of newly added patches in the ecological space gradually increases,and the area of newly added patches in the living space gradually decreases.The farther away from the highway,the newly added patches of living space gradually shrink,and the patches of reduced ecological space gradually shrink.Returning farmland to forest is the main driving factor for the expansion of green ecological space,Regional development planning is the main driver of the direction of living space development,The overall land use planning is the main driving factor for changes in production space.Population and social economy determine the direction of the evolution of "PLE Space".The construction of transportation trunk lines has deepened the fragmentation of the maps in the Nanliu River Basin.Urbanization has led to a single type of "PLE Space" landscape.