Study On Urban Expansion Dynamics Of Fuzhou City Based On GIS And RS

Urban expansion is in the process of urban economic development,due to the increase in population caused by the expansion of urban construction land.In this paper,RS and GIS techniques were used to study the urban expansion of Fuzhou in the past 20 years in combination with Landsat images in 1995,2005 and 2015,and then the land use change in Fuzhou was analyzed.Environmental evolution to explore,and finally put forward the expansion of Fuzhou City in the allocation of optimization and sustainable development of resources and environment,and some suggestions.The main conclusions drawn from the study are as follows:(1)Through the analysis of land use change,it can be seen that the area of construction land in Fuzhou has increased and increased greatly in the past two decades,and the growth rate of cultivated land,woodland and grassland gradually decreased in the past ten years,and the decline of cultivated land was the most significant.(2)Based on the analysis of surface temperature inversion and impervious surface analysis of Fuzhou city,the surface temperature of Fuzhou is increasing and the area of impervious surface is also increased.This result is consistent with the results of land use change in Fuzhou,which shows that the process of urbanization in Fuzhou is very rapid in recent years.(3)Through the dynamic analysis of Fuzhou landscape pattern,it can be seen that the plaque area of woodland,cultivated land and water body is more obvious in the development process of Fuzhou in the past two decades,and the patch area of construction land has increased greatly,and the landscape is broken The degree of urbanization is becoming more and more complicated,which is influenced by human activities.It is more intuitive to reflect the speed and result of urbanization in Fuzhou.(4)By analyzing the social and economic data of Fuzhou from 1995 to 2015,the driving factors influencing the urban expansion of Fuzhou are divided into the following aspects:natural factors,population factors,economic factors and policy factors,the research shows that The main driving force for its development comes from the development of urban economy,while the role of macro-control policy cannot be ignored.