Spatial And Temporal Changes Of Land Use In The Middle And Lower Reaches Of The Yangtze River And Its Influencing Factors

With the rapid economic development and the continuous improvement of people's living standards,human beings have gradually increased the use and transformation of land resources.Unreasonable development and utilization have led to serious soil degradation,soil erosion,desertification and other problems.Such problems have seriously affected the sustainable development of land-use ecosystem and society.Study the temporal and spatial change of land use and its impact factors The scientific significance of element analysis is to make clear the degree of land use and its influencing factors,so as to provide a better reference and reference for the rational use of land and the promotion of social sustainable development,so the research on land use change has become a hot topic at present.This paper takes the middle and lower reaches of the Yangtze River as the research area,and uses the data of 2005,2010 and 2015 to analyze the land use type change of the middle and lower reaches of the Yangtze River through the classification and overlay analysis of Arc GIS software,and discusses the impact of economic and human factors on the land use pattern of the middle and lower reaches of the Yangtze River through correlation analysis,variance analysis,factor analysis and other means The results show that the economic development of the middle and lower reaches of the Yangtze River changes the types of land use,and also can provide effective samples and model support for the long-term economic development prediction and the correlation prediction of land use.The conclusion is as follows:?The comprehensive index of land use degree,the dynamic degree of land use and the center of gravity model of land use type are analyzed,and the process of land use degree change and center of gravity transfer in the middle and lower reaches of the Yangtze River are calculated.It can be seen from the dynamic degree that the land use types in the middle and lower reaches of the Yangtze River mainly change from cultivated land and forest land to urban construction land.The land use dynamic degree of urban construction land and unused land increased by 2.37% and 0.72% respectively in 2005-2015.The dynamic degree of other types decreased while the comprehensive land use dynamic degree still increased by 0.12%.It can be seen from the center of land use types that the center of land use of water area,cultivated land and urban construction land is concentrated in the East and North,while the center of land use of other land use types with low development level is concentrated in the southwest,which constitutes the spatial distribution of land use in the middle and lowerreaches of the Yangtze River.From 2005 to 2015,the center of gravity of land use has also changed significantly.The largest moving range is that the center of gravity of woodland land use types has reached 34.62 km in 2005-2010.? This study is based on the year-on-year change estimation data of land use comprehensive index and various indicators of regional economic development,including economic development indicators and structures,urban construction,agricultural development,transportation conditions and other indicators.In the empirical research,this paper mainly uses correlation analysis,variance analysis,factor analysis,multiple regression,PLS regression to process and mine the data.In the part of empirical analysis,correlation analysis shows that the indicators are generally closely related;variance analysis shows that there is a certain gap in the impact of transport conditions on different land use types.Factor analysis divides three different common factors from the above data of land use types and economic development indicators,and the interpretation ability of each common factor is relatively strong,but depends on the public Further analysis after factor extraction generates regression equations of all kinds of land use areas,and the results further show that the land types with reduced land use areas such as cultivated land and forest land are affected by data fluctuations in the opposite direction.In numerical terms,they are mainly complementary to urban construction land,which constitutes the matrix characteristics of land use type conversion under the condition of basic stability of total land.This paper discusses and analyzes the above conclusions,and puts forward some suggestions and suggestions,such as ensuring the red line of cultivated land,controlling forest land cutting and introducing more satellite remote sensing data into government decision-making.