Remote Sensing Monitoring And Analysis Of Land Use/cover Change In Poyang Lake Basin

The influence of human activities on the regional scale landscape plays an important role in the current environmental change,it's one of the main factors to the regional landscape pattern change.Land use/cover change plays an important role in the global change,it becomes an important part in the environment and resources remote sensing.Taking Poyang Lake Basin as the study area,the paper uses NOAA/AVHRR series images during 1983-1999 and MODIS09A1 series data in October during 2000-2016.In order to gain the status quo of land use,the paper gains the range of land use classification through CART decision tree automatic extraction method with the aid of 3S technology.What's more,the paper analyzes the land use change and tendency from the aspects of transfer matrix of land use,landscape pattern,the driving factors of land use change and NDVI changes trend of land use,analyses the status quo and trend of land use change in the Poyang Lake Basin quantitatively,and with the aid of Idrisi software platform,the paper uses the CA-Markov model to predict the land use cover in the watershed of 2022,2028 and 2030.It can provide reference basis for land resources sustainable development of Poyang Lake basin.The main results of the thesis show that:(1)Changes is absolute,constant is relative.The reason of surface coverage changes in the Poyang Lake basin,mainly lies in the features of landscape changes caused by human activities,a wide range of regional land use change driving force is under the function of natural and social economic factors,during which,the social and cultural factors play the leading roles in the driving force.(2)The arable land and woodland land are the main landscape types in the basin,basin landscape level within the research phase of aromatic diversity index show the trend of increases first and then decreases,which shows the rich and fragmentation degree of land use in the basin increases first and then decreases.(3)During 2000 and 2005,the arable land and woodland shows a decreasing trend,but the water,grassland and naked land shows an increasing trend;Between 2005 and 2010,only woodland shows an increased trend;Between 2010 and 2015,the annual change rate of water and woodland is 3.29% and 0.25% respectively.The comprehensive land use change in 2000-2005,2005-2010,2010-2015 is 3.05,3.26 and 2.34 respectively.(4)The statistical analysis results indicate that,humanistic factors of land use change in the Poyang Lake watershed driving forces including macro economic factors,industrial structure,the life level,population and land use policies,during which,GDP and the first industry factor can cover the main part of the influencing factors.(5)Based on the application of 2007,2014 land use classification graph,the paper uses the CA-Markov model for land use cover change simulation analysis,the results show that wate area will increase first and then decrease,farmland and forest area will reduce first but then increase,area for construction will gradually increase and the bare land will continue to decrease.