| Monitoring the Land Displacements using Multitemporal SAR-Interferometry Sentinel-1A to Analyze the Land Instability Hazards as an Impact of GERD-Lake |
| Paper ID : 1151-ICRSSSA |
| Authors |
|
Ali Ali Ibrahim Amasha * Arab Academy for Science Technology & Maritime Transport.
Off El-Moshir Ahmed Ismaiel, Sheraton District, Cairo, Egypt |
| Abstract |
| Abstract: The land instability hazards have created due to the weight of a new structure that triggers a previously stable area or from low density/open structures that can become unstable when critical load is exceeded. In the Grand Ethiopian Renaissance Dam (GERD) lake, the land is geological unstable. The potentiality of instability hazards is exceeded with the lake creation. Multitemporal of SAR-Interferometry Sentinel-1A SLC data have been analyzed to monitor the displacements. According to the data availability, the displacement map of Apr2017 to Apr2018 is great different from the Apr2018-2020, Apr2020-Mar2021 and to Aug2021. The displacements of Apr2017-2018 are about 1 to 1.5 m along the lake zone decreased gradually to 50 to -5 cm eastwards while increased up to 2.3 m westwards where the displacement zones are NW-SE. While the displacement zones were changed to SW-NE in Apr2020-Mar2021 and recorded as -80 to -50 cm southwards to about 40 cm northwards of the lake. Additionally, it recorded from -30 to -70 cm eastwards to about -1 to -2 m westwards. Therefore, there are geological hazards potential due to the newly created GERD lake. The overall displacements from Apr2017 to Aug2021 are -70 to -30 up to +6 cm gradually northeastwards, along the GERD Lake direction. Therefore, these changes may enforce geological hazards that affect the GERD failure then flooding catastrophe potentiality. |
| Keywords |
| SAR-Interferometry, Sntinel-1A SLC, Land Displacements, Land Instability, Geological Hazards, GERD Lake |
| Status: Accepted (Oral Presentation) |
