Study On The Evolution Of Landscape Pattern In Qianxi County Of Guizhou Province Based On RS And GIS

The landscape pattern is influenced by natural,social economic and demographic factors,and can reflect the social and economic development of a region intuitively,and has obvious regional and comprehensive.Landscape pattern change is one of the main causes of global ecological environment changes,therefore,the landscape pattern of evolution has become the current research hotspots at home and abroad.The research focus of the existing landscape pattern is mainly focused on the classification of landscape types,dynamic monitoring and environmental impact assessment,and the research on the driving factors and the simulation of spatial evolution are also being carried out.3S technology in this area is still in the exploration stage,especially for the county scale research is still less,so this is the attempt to explore one of the key content of the study.This paper chooses Qianxi County,Guizhou Province,which has obvious land use change as the research object,and systematically studies the temporal and spatial relations and driving factors of its landscape pattern.It aims to explore the characteristics and value of Qianxi County’s landscape and explore the evolution of landscape pattern of the county’s urban and rural development,land intensive,urban system planning,urban spatial integration and so on to provide a certain reference.Based on the multi-source remote sensing,the spatial database of landscape pattern of 1995,2001,2007 and 2013 was established by using GIS technology.The Fragstats and CA-Markov models were selected according to the powerful analysis function of GIS.The landscape pattern,spatial dynamic change and evolution trend of the study area were analyzed.The results are as follows:(1)At the level of type,the landscape pattern of the study area changed greatly from 1995 to 2013,especially the cultivated land,construction land and water area changed significantly.(2)At the level of landscape,although the proportion of the landscape types in the study area has changed,there is no change in the proportion of the landscape types in the study area,but there are no changes in the proportion of the landscape types in the study area,not only the natural factors,but also the demographic factors,economic factors,industrialization and urbanization,and policy factors.(3)In the prediction simulation,the landscape pattern of Qianxi County in 2019 was simulated and simulated by using the landscape transfer matrix and suitability of 2007 and 2013.The urban construction land in the study area will be developed southward and the cultivated land area will be reduced,the woodland and grassland area will increase.