【作者】 李军成；

【导师】 万力； 梁四海；

【作者基本信息】 中国地质大学（北京） ， 地下水科学与工程， 2014， 博士

【摘要】 青藏高原是我国长江、黄河、和亚洲诸多重要江河水系的发源地，对我国和亚洲众多国家的生态安全具有重要的影响力，青藏铁路是我国重要的战略性工程，因此从宏观角度系统分析青藏高原生态地质环境的稳定性及影响因素具有重要的意义，不仅是前沿的基础科学研究，更具有重要的应用前景。本文基于遥感和地理信息技术，在遥感软件ERDAS、ENVI，IDL、GIS软件ARCGIS的支持下基于美国NOAA卫星的植被指数产品GIMMS-NDVI和EOS的MODIS-NDVI以及MODIS-LST数据、合成孔径雷达卫星数据对青藏高原及青藏铁路沿线宏观植被生态环境及沉降形变进行了相关研究。论文研究内容包括两大核心部分，一是青藏高原及青藏铁路沿线植被生态的空间分布及演变的定量描述以及控制性因素研究，二是定量计算青藏铁路的沉降形变。第一部分利用GIMMS-NDVI数据、MODIS卫星的陆面温度产品数据和植被指数产品数据分析了青藏高原及青藏铁路及沿线植被生态演变及表层土壤水分布规律，并分析其相互关系。第二部分，青藏铁路作为青藏高原重要的线状工程，冻融沉降对其有着重要的危害，首次使用宽幅合成孔径雷达数据计算了青藏铁路的沉降形变量。研究表明青藏铁路及沿线植被生态的演变主要受表层土壤水控制，且表现稳定，气温降水无论从空间还是时间周期上不对植被生态演变起控制性作用。青藏铁路在垂向上受高原冻融环境的影响具有沉降形变的危害。更多还原

【Abstract】 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.更多还原