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Volume 16
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10.3390/w16071025
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Article

Deformation Monitoring and Potential Risk Detection of In-Construction Dams Utilizing SBAS-InSAR Technology—A Case Study on the Datengxia Water Conservancy Hub

by
Yi Ouyang
1,4,
Tao Feng
1,4,
Han Feng
2,*,
Xinghan Wang
3,
Huayu Zhang
1,4 and
Xiaoxue Zhou
3
1
State Grid Hunan Electric Company Limited Disaster Prevention and Reduction Center Changsha, Changsha 410000, China
2
Guizhou Provincial First Institute of Surveying and Mapping, Guiyang 550000, China
3
Pearl River Water Resources Research Institute, Pearl River Water Resources Commission, Guangzhou 510000, China
4
The State Key Laboratory of Disaster Prevention & Reduction for Power Grid, Changsha 410000, China
*
Author to whom correspondence should be addressed.
Water 2024, 16(7), 1025; https://doi.org/10.3390/w16071025
Submission received: 13 March 2024 / Revised: 29 March 2024 / Accepted: 30 March 2024 / Published: 2 April 2024
(This article belongs to the Special Issue Water Engineering Safety and Management)
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Abstract

Deformation monitoring plays a pivotal role in assessing dam safety. Interferometric Synthetic Aperture Radar (InSAR) has the advantage of obtaining an extensive range of deformation, regardless of weather conditions. The Datengxia Water Conservancy Hub is the largest in-construction dam in China. To effectively assess the in-construction dam safety, the SBAS-InSAR (Small Baseline Subset-InSAR) technique and 86 Sentinel-1 images (from 11 February 2020, to 16 January 2023) have been employed in this study to monitor the deformation over the reservoir and its surrounding areas. The reliability of the SBAS-InSAR monitoring results over the study area was demonstrated by the in situ monitoring results. And the InSAR results show that the central section of the left dam exhibits the most substantial cumulative deformation, attributed to the maximal water pressure. This is closely followed by the left end of the dam, which reflects a similar but smaller deformation. However, the in-construction cofferdam facilities make the right-end section of the left dam more robust, and the deformation is the most stable. Additionally, significant deformation of the auxiliary dam slope has been identified. Moreover, the analysis indicated that the deformation of the four upstream slopes is closely related to the precipitation, which potentially poses a threat to the safety of the Datengxia Dam.
Keywords: Datengxia Water Conservancy Hub; SBAS-InSAR; deformation monitoring; time series analysis Datengxia Water Conservancy Hub; SBAS-InSAR; deformation monitoring; time series analysis
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MDPI and ACS Style

Ouyang, Y.; Feng, T.; Feng, H.; Wang, X.; Zhang, H.; Zhou, X. Deformation Monitoring and Potential Risk Detection of In-Construction Dams Utilizing SBAS-InSAR Technology—A Case Study on the Datengxia Water Conservancy Hub. Water 2024, 16, 1025. https://doi.org/10.3390/w16071025

AMA Style

Ouyang Y, Feng T, Feng H, Wang X, Zhang H, Zhou X. Deformation Monitoring and Potential Risk Detection of In-Construction Dams Utilizing SBAS-InSAR Technology—A Case Study on the Datengxia Water Conservancy Hub. Water. 2024; 16(7):1025. https://doi.org/10.3390/w16071025

Chicago/Turabian Style

Ouyang, Yi, Tao Feng, Han Feng, Xinghan Wang, Huayu Zhang, and Xiaoxue Zhou. 2024. "Deformation Monitoring and Potential Risk Detection of In-Construction Dams Utilizing SBAS-InSAR Technology—A Case Study on the Datengxia Water Conservancy Hub" Water 16, no. 7: 1025. https://doi.org/10.3390/w16071025

APA Style

Ouyang, Y., Feng, T., Feng, H., Wang, X., Zhang, H., & Zhou, X. (2024). Deformation Monitoring and Potential Risk Detection of In-Construction Dams Utilizing SBAS-InSAR Technology—A Case Study on the Datengxia Water Conservancy Hub. Water, 16(7), 1025. https://doi.org/10.3390/w16071025

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