Land Use Changes And Driving Forces In Northern Sichuan

Land is the basis for survival and development of human,and it is economy and material wealth source for whole society.Land use is a comprehensive system of natural,human,social,scientific and technical aspects.At the same time,its use,utilization and management will also affect the socio-economic development in the region.With the the rapid development of social productive y,on the one hand,the demand of land is increasing continually.On the other hand,the phenomenon of land abuse and indiscriminate use still exist in the present society,which makes the contradiction between man and land become more and more effective.Land use change is one of the core issues in the study of land use / land cover change(land use and land cover change),and it has become the most important form of land using change.Natural,social,human and other factor led to a series of land use changes.Thus,it is helpful to deepen the management of land planning,coordinate the development of population,explore the formulation of relevant policies,and to ensure the development of land use.The sustainable use of resources has a very significant significance.In this paper,the land use type of Cangxi County in 2001-2016 was studied.At the same time,according to the land classification standard,this paper analyzed the relationship between the number and degree of land use with the diversity of its utilization through a variety of mathematical model analysis methods.Meanwhile,this study used the principal component analysis method and the dynamic analysis of the driving factors.The results are as follows:(1)During 2001-2016,the land use structure of Cangxi County had the following characteristics: the cultivated land,urban and village and industrial and mining land,water and water conservancy facilities land area was basically unchanged,forest land,transportation land area increased,garden land,grassland and other land Area reduced.The land use dynamics of Cangxi County from 2001 to 2016 indicated that the land,grassland,water and water conservancy facilities and other land in Cangxi County have decreased during this period(2)During 2001 to 2016,the land use comprehensive index of Cangxi County increased from 2.54 to 2.57,and the diversity index showed a decreasing trend.The land use diversity index tends to be stable in 2014-2016.After the 2008,the land comprehensive utilization index increased steadily and then became stable,the land use change was 0.03,and the land use change rate was 1.56,which indicated that the land use degree entered the rising period,but Land use diversity has declined.(3)Through the qualitative analysis,the population,urbanization rate and economic factors were the important drivers of cultivated land and construction land in Cangxi County.At the same time,according to the factor eigenvalue and the contribution rate of principal component,the main socio-economic driving factors in the study area of??Cangxi County in the 16 years of land using change including the tertiary industry,the secondary industry,and population growth.