Displacement monitoring of upper Atbara dam based on time series InSAR. Issue 375 (1st November 2020)

• Record Type: Journal Article
• Authors: Wang, Q. Q.; Huang, Q. H.; He, N.; He, B.; Wang, Z. C.; Wang, Y. A.
• Is Part Of: Survey review. Volume 52:Issue 375(2020)
• Page Start: 485
• Page End: 496
• Publication Date: 2020-11-01
• Subjects: Upper Atbara dam -- Time series InSAR -- Displacement monitoring -- Sentinel-1A; Surveying -- Periodicals; Great Britain -- Surveys -- Periodicals; 526.9
• DOI: 10.1080/00396265.2019.1643529
• Languages: English
• ISSNs: 0039-6265

Abstract

Abstract : Dam is an important part of engineering structure, in the process of dam construction, the dam monitoring is crucial since water erosion and time-dependent motion may cause deformation. Traditional monitoring methods are time-consuming and labour-intensive. However, Interferometric Synthetic Aperture Radar (InSAR) can provide precise and spatially dense information on slow deformations. This research investigated the longest earth-rock-fill dam in Sudan to determine the spatial and temporal deformations Sentinel-1A descending SAR images were further used to analyse the issues mentioned above. The results suggested that the dam existed the maximum displacement with a value up to 190 mm on the dam crest. Besides, the selected sections along the riverbed of the dam were analysed and the RMSE was approximately 2 mm/year. The results were in good agreement with the in situ measurements, indicating the advancement of time series InSAR in dam deformation monitoring.