Monitoring of Masjed-Soleiman Embankment Dam’s Deformation Using a Combination of Interferometric Synthetic Aperture Radar (Insar) and Finite Element Modeling

Abstract

The fresh water shortage is one the most important challenges in many countries like Iran. So there have been incentives to manipulate and manage water resources by constructing dams. Clay core embankments are one of the most popular dam structures. A layer of clay can be a reliable obstacle in front of water stream. However, because of the soil’s nature, these kinds of dams have the potential of instability. Thus deformation of clay core dams should be monitored frequently. The aim of this study is to use the combination of Interferometric Synthetic Aperture Radar technique (InSAR) and Finite Element Modeling (FEM) for dam’s deformation monitoring. For the InSAR analysis we used data from ENVISAT sensor and processed those using Small BAseline Subset (SBAS). We show that InSAR is an invaluable approach to monitor clay core dam’s deformation in specific circumstances. The deformation derived from InSAR was used as an initial condition in Finite Element Modeling. The case study is Masjed Soleiman Dam which is situated in South West of Iran. We used 19 ASAR images of ENVISAT sensor from 2003/8/22 to 2010/5/7. The process of ASAR images showed maximum velocity of 11 mm/year in LOS direction at central lower areas of dam. These results were compared with Geodetic Surveying Operations at four points on dam and the average agreement of 77 percent was obtained. The results of ENVISAT data have a good consistency with FEM results. Horizontal and vertical displacements derived from instrumentations and modeling are plotted versus depths. There is a good agreement between modeling results and instrumentations data.

Deformation Monitoring and Analysis of Reservoir Dams Based on SBAS-InSAR Technology—Banqiao Reservoir

“…Yang (2017) [12] obtained the surface deformation results for the Xiaowan Dam and Three Gorges Dam using the TS-InSAR technique, demonstrating the practicability of using the TS-InSAR technique for dam deformation monitoring. Aminjafari (2017) [13] used SBAS technology to monitor the deformation of the Masjed Soleyman Dam, and a comparison showed that the InSAR results were consistent with the geodetic results. Xiao et al (2019) [14] used the improved TS-InSAR technology to monitor deformation of the Guangnan Reservoir Dam and verified the effectiveness of the InSAR time series for monitoring hydraulic structures, such as dams in the reservoir area.…”

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

“…The SBAS-InSAR method [21], as a representative time series InSAR technique, effectively overcomes the effects of temporal and spatial decorrelation and atmospheric delays by appropriately combining interferograms to analyze distributed scatterers (DSs) with high coherence. Research results from the application of SBAS-InSAR technology in dam monitoring [22][23][24] demonstrate that this technique can efficiently and accurately obtain deformation monitoring results for dams, allowing for real-time assessment of the dams' operational health status.…”

Historical Retaining Walls Monitoring: A Case Study of Debosquette Wall of Kyiv-Pechersk Lavra

“…Numerous studies have investigated various monitoring methods depending on the displacements to be measured (vertical, horizontal, or spatial). These methods include different types of leveling, traverses, GNSS, laser scanning, photogrammetry, InSAR, sensors, and their combinations [1][2][3][4][5][6][7][8][9][10][11][12][13]. The application of these methods has its pros and cons.…”