Study On The Ecological And Geological Environment Along The Qinghai-tibet Railway

The Tibetan Plateau is the birthplace of the Yangtze River, the Yellow River, andmany important rivers in Asia, which has major impact on the ecological security ofmany countries in Asia including China, and the Qinghai-Tibet railway is animportant strategic project in China, so it is significant for macroanalysis in stabilityand influence factors of eco-geological environment in the Tibetan Plateau, which isnot only the new scientific research, but also has an important application prospect.The research is based on remote sensing and GIS technology, such as the remotesensing software ERDAS, ENVI, IDL, GIMMS-NDVI, MODIS-NDVI andMODIS-LST and wide synthetic aperture radar data of the vegetation ecologicalevolution, subsidence and deformation along the Qinghai-Tibet railway in theTibetan Plateau.This paper includes two parts, one is the quantitative description on spatialdistribution and evolution of vegetation ecosystem along the Tibetan Plateau and theQinghai-Tibet railway, including studying the major factors, two is the quantitativecalculation on subsidence and deformation of the Qinghai-Tibet railway. The firstpart, the author used GIMMS-NDVI data, MODIS products of temperature data andvegetation index data analyze the vegetation ecological evolution and distribution ofsurface soil water in the Tibetan Plateau and the Qinghai-Tibet railway, and analyzethe relationship between them. The second part, the author first used wide syntheticaperture radar data calculate subsidence and deformation in the Qinghai-Tibetrailway which is an important linear engineering of the Tibetan Plateau, sufferingfrom frozen freeze and subsidence.It shows that the ecological evolution of vegetation along the Qinghai-Tibetrailway is mainly controlled by the surface soil water in the steady state, temperatureand precipitation don’t play an important role of vegetation ecological evolutioneither space or time cycle. The Qinghai-Tibet railway has subsidence anddeformation because of influence on Plateau frozen freeze.