基于SBAS-InSAR方法的新疆平原水库坝区形变监测应用研究  

Application of Deformation Monitoring in Dam Area of Xinjiang Plain Reservoir Based on SBAS-InSAR Method

作　　者：林锋 董文明[2] 黄静[2] 张红忠[2] 

机构地区：[1]新疆水发水务集团WLL水库运营部,新疆 乌鲁木齐 [2]新疆农业大学水利与土木工程学院,新疆乌鲁木齐

出　　处：《测绘科学技术》2024年第2期150-158,共9页Geomatics Science and Technology

摘　　要：本文利用欧洲航天局中等分辨率Sentinel-1A免费影像数据,采用SBAS (Small Baseline Subset)方法,以2014年~2018年期间的23景影像为数据源,开展了时序InSAR在新疆WLL平原水库大坝及坝区的形变监测研究。提取了该水库大坝及周边5 km左右范围的沉降监测结果,并利用大坝二等水准监测数据对水库堤坝监测结果进行验证,形变速率中误差为±9.3 mm。结果表明:大坝存在不均匀沉降;靠近东坝段的水产养殖中心产生1个沉降漏斗,中心最大沉降速率−20.0 mm/a;距离水库5 km左右的工业区和居民区产生3个沉降漏斗,最大漏斗中心沉降速率−76.0 mm/a。最后结合水库水位变化、周边植被种植和产业分布以及地下水抽取等情况分析了大坝及坝区周边区域的沉降时空分布特征和产生的原因。In this paper, the deformation monitoring study of time-series InSAR on the dam and dam area of Xinjiang WLL Plain Reservoir was carried out by using the European Space Agency’s medium-resolution Sentinel-1A free imagery data and the SBAS (Small Baseline Subset) method with the 23-view imagery between 2014 and 2018 as the data source. The results of the settlement monitoring of the reservoir dam and the surrounding area of about 5 km were extracted, and the monitoring results of the reservoir embankment were verified using the second-class level monitoring data of the dam, and the median error of the deformation rate was ±9.3 mm. The results showed that: there was an inhomogeneous settlement at the dam;the aquaculture center near the east dam section produced a settlement funnel, with a maximum settlement rate of the centre of −20.0. Finally, the spatial and temporal distribution characteristics and causes of the settlement of the dam and the surrounding areas were analyzed in light of the changes in the water level of the reservoir, the distribution of the surrounding vegetation and industries, the groundwater pumping, etc. The results showed that there is an uneven settlement in the dam;one settlement funnel was generated in the aquaculture center near the east dam section, with a maximum settlement rate of −20.0 mm/a;and three settlement funnels were generated in the industrial and residential areas around the reservoir at a distance of about 5 km, with a maximum settlement rate of −76.0 mm/a.

关 键 词：SBAS 大坝 平原水库 沉降 

分 类 号：TV6[水利工程—水利水电工程]