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首页> 外文会议>China High Resolution Earch Observation Conference >Monitoring and Analysis of Surface Deformation and Glacier Motion Along the Sichuan-Tibet Railway: A Case Study of the Lhasa-Nyingchi Railway Section
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Monitoring and Analysis of Surface Deformation and Glacier Motion Along the Sichuan-Tibet Railway: A Case Study of the Lhasa-Nyingchi Railway Section

机译：川藏铁路沿线地表变形和冰川运动的监测与分析-以拉萨-林芝铁路段为例

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The Sichuan-Tibet Railway which stretches as far as 1600 km starts from Chengdu in Sichuan Province and west to Lhasa in the Tibet Autonomous Region. The terrain along the railway is undulating, the ecological environment is fragile, and the railway passes through high-intensity active seismic belts and geological fault zones, facing a variety of geological disaster risks. Keeping abreast of changes in surface morphology along the railway and further monitoring and early warning of disasters can provide important technical support for the smooth construction and safe operation of the Sichuan-Tibet Railway. Taking the Lhasa to Nyingchi Railway section as an example, using the spaceborne SAR data, the surface deformation information along the railway was extracted by using the interferometry point target analysis (IPTA) technology, and the glacier motion information was derived by using the pixel offset-tracking (POT) technology. The observation results showed that the annual subsidence velocity was small in most areas of our study area, except the local areas along the LinMao Highway, whose subsidence velocity was more than 3.5 cm/year, which can be served as a key monitoring area. Another observation was that the velocity of glacier motion had a great relationship with the temperature change in our study area. As a whole, the velocity of glacier motion increases with the increase of temperature, and the glacier motion velocity in summer is significantly higher than that in winter. In addition, local topographic conditions such as slope and aspect also had a great influence on the glacier motion velocity of the glacier. Therefore, it is necessary to analyze the glacier motion in combination with local topographic.
机译：长达1600公里的川藏铁路始于四川省成都市，西至西藏自治区拉萨市。铁路沿线地形起伏，生态环境脆弱，铁路穿过高强度活动地震带和地质断裂带，面临各种地质灾害风险。及时了解铁路沿线的地貌形态变化，对灾害进行进一步的监测和预警，可为川藏铁路的顺利建设和安全运行提供重要的技术支撑。以拉萨至林芝铁路段为例，利用星载SAR数据，通过干涉点目标分析（IPTA）技术提取铁路沿线的表面变形信息，并利用像素偏移量得出冰川运动信息。跟踪（POT）技术。观测结果表明，除临Ma高速公路沿线沉降速度超过3.5 cm / year的区域外，本研究区大部分地区的年沉降速度较小，可作为重点监测区域。另一个观察结果是，冰川运动的速度与我们研究区域的温度变化有很大关系。总体而言，冰川运动的速度随温度的升高而增加，夏季的冰川运动速度明显高于冬季的冰川运动速度。另外，局部地形条件如坡度和坡度也对冰川的冰川运动速度有很大的影响。因此，有必要结合局部地形对冰川运动进行分析。

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