Research On The Spatial-temporal Evolution Of Soil Desertification In The Lower Reaches Of Tarim River Based On3S

With the dramatic increase in the rapid development of economic, social and population, thegrowing influence of human activities on the ecological environment to deepen, desertification hasbecome one of the major environmental problems facing humanity.(Korhan–Titima River) in thestudy area, the use of "3S" technology on Spatial and Temporal Variation in Desertification andnatural influencing factors of desertification and remote monitoring can be widely concerned aboutthe lower reaches of Tarim River draw on the technical routes and methods, and provide a theoreticalbasis for the prevention of desertification in the lower reaches of Tarim River, ecological restorationand decision support.In this paper, based on1990,2001,2011years of remote sensing images the lower reaches ofTarim River land dynamic degree of desertified land area change, the single desertification types,dynamic range and desertified land transfer matrix on the1990-2011years of the study area of landdesertification in spatial and temporal variations; andthe process of desertification, the natural andhuman impact factors (climate, population growth, water use, groundwater and vegetation) andquantitative research. The main conclusions and understanding are as follows1.1990,2001,2011desertification information extraction accuracy analysis showed that threeoverall classification accuracy in more than90%, Kappa coefficients were above0.85.2. This paper summarizes the number of desertified land change, hierarchical dynamic ofdesertification changes and changes in amplitude, single desertified land dynamic degree,desertification, land transfer matrix and desertification spatial variation model of1990-2011years ofthe study area of land desertification in the temporal and spatial variation.3. population growth, the intensification of human activities and water resources is unreasonableuse of the root causes of the downstream land desertification. Drastically reduced due to the middlereaches of human activities on water diversion increases, resulting in downstream runoff. The fallingwater tables, vegetation drying up of a series of ecological problems caused by the downstream areaof land desertification.