Civil Engineering and Architecture Vol. 9(3), pp. 958 - 968
DOI: 10.13189/cea.2021.090337
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Sensitivity of Enhanced SRTM for Sea-Level Rise Variation on Egyptian Coasts

Alshimaa A. Hussien ^1,*, Mohamed Gomaa M. Mohamed ², Pasent H. A. Yousef ³, Mohamed R. Hagag ³, Tarek Abou El Seoud ^3
1 Survey Research Institute, National Water Research Center, Giza, Egypt
² Public Works Department, Faculty of Engineering, Cairo University, Giza, Egypt
³ Environmental Planning and Infrastructure Department, Faculty of Urban and Regional Planning, Cairo University, Giza, Egypt

ABSTRACT

The accuracy of digital elevation models (DEMs) is very critical to planning adaptation strategies for coastal areas under changing scenarios of global climate and sea-level rise. This research assesses the accuracy of the interferometric DEM from the SRTM mission as it is one of the free available DEMs that have been widely used in many applications. The SRTM model is enhanced using the best fit global geoid model for Egypt instead of EGM96 and by applying a mathematical scale factor formula. This research aims to obtain a higher vertical accuracy of the SRTM model that achieves the requirements for coastal inundation studies with minimum field measurement data. The methodology approach consists of three phases. In the first phase, the enhancement scale factor formulas were derived using uniformly distributed ground control points (GCPs) at two different terrains data in Egypt. The second phase contains the evaluation and validation process. It was observed that the enhanced accuracy achieved ranged from 45% to 60 % based on the type of terrains. In the last phase, the sensitivity of these DEMs to sea-level projections using the recent available local tide gauge data was analyzed. It is recommended to investigate this method approach to determine the optimal size and distribution of reference ground control points needed to adjust various free open DEMs of low vertical accuracy for further studies and other applications.

KEYWORDS
SRTM, Vertical Accuracy, Coastal Inundation, Scale Formula, Enhancement, Tide Gauge

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Alshimaa A. Hussien , Mohamed Gomaa M. Mohamed , Pasent H. A. Yousef , Mohamed R. Hagag , Tarek Abou El Seoud , "Sensitivity of Enhanced SRTM for Sea-Level Rise Variation on Egyptian Coasts," Civil Engineering and Architecture, Vol. 9, No. 3, pp. 958 - 968, 2021. DOI: 10.13189/cea.2021.090337.

(b). APA Format:
Alshimaa A. Hussien , Mohamed Gomaa M. Mohamed , Pasent H. A. Yousef , Mohamed R. Hagag , Tarek Abou El Seoud (2021). Sensitivity of Enhanced SRTM for Sea-Level Rise Variation on Egyptian Coasts. Civil Engineering and Architecture, 9(3), 958 - 968. DOI: 10.13189/cea.2021.090337.