Faculty Advisor

Dr. Mohamed Sultan

Department

Geosciences

Presentation Date

4-12-2018

Document Type

Poster

Abstract

Persistent scatterer interferometric analyses were conducted on a stack of 84 Envisat ASAR scenes spanning 7 years (2004 to 2010) over the entire Nile Delta of Egypt and surroundings to monitor the ongoing spatial and temporal land deformation, identify the factors controlling the deformation, and model the interplay between sea level rise and land subsidence to identify areas and populations threatened by sea encroachment by the end of the 21st century. Findings include: (1) general patterns of subsidence in the northern delta, near-steady (none) subsidence in the southern delta, separated by a previously mapped flexure zone undergoing uplift; (2) high subsidence rates over the north central and northeastern delta, possibly due to compaction of recent, thick, clay-rich sediments; (3) high subsidence rates in areas where the highest groundwater extraction rates were reported in southern delta and in reclaimed desert land in the western delta; (4) high subsidence rates over the Abu Madi gas field, where high gas extraction rates have been recorded; (5) using extracted deformation rates, high-resolution TanDEM-X digital elevation model, a eustatic sea level rise of 0.4 m, and applying a bathtub inundation model, an estimated 2660 km2 in northern delta will be inundated by year 2100.

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