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title Use of radar data to delineate palaeodrainage flow directions in the Selima Sand Sheet, Eastern Sahara
authors Robinson, C; El-Baz, F; Ozdogan, M; Ledwith, M; Blanco, D; Oakley, S; Inzana, J
author full name Robinson, C; El-Baz, F; Ozdogan, M; Ledwith, M; Blanco, D; Oakley, S; Inzana, J
title Use of radar data to delineate palaeodrainage flow directions in the Selima Sand Sheet, Eastern Sahara
nationality nacional
source PHOTOGRAMMETRIC ENGINEERING AND REMOTE SENSING
language English
document type Article
keywords plus AFRICAN DRAINAGE SYSTEM; RIVERS
abstract Palaeodrainage directions in the Selima Sand Sheet (centered on 22.5 degrees N, 29 degrees E) were determined using high-resolution, multi-wavelength, multi-polarization Spaceborne imaging Radar (SIR-C) data and the Global Land One-km Base Elevation (GLOBE) Project Digital Elevation Model (DEM). The combined use of these two data sets shows that both large;flood features and later superimposed drainage channels of variable morphology all drain NE and ENE from northwest Sudan toward the Kharga depression in southern Egypt. This is supported by drainage directions deduced from the USGS Global Topography (GTOPO) DEM. These directions are opposite to those of the Trans-African Drainage System (TADS) model in which the large flood features are considered to flow southwest across northeastern Africa into the Chad Basin. Instead, the results show that an internal drainage basin operated in the gently undulating terrain of the Selima Sand Sheet (probably during the Cenozoic period), and that the slope of the North African plate remained generally northeastward during those times. Further, the northeastern parts of the Selima Sand Sheet are likely to be the primary area for ground-water accumulation in southern Egypt.
author address Boston Univ, Ctr Remote Sensing, Boston, MA 02215 USA
reprint address Robinson, C (reprint author), Boston Univ, Ctr Remote Sensing, Boston, MA 02215 USA.
orcid number Ozdogan, Mutlu/0000-0002-1707-3375
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cited reference count 20
times cited 26
total times cited count (wos, bci, and cscd) 26
publisher AMER SOC PHOTOGRAMMETRY
publisher city BETHESDA
publisher address 5410 GROSVENOR LANE SUITE 210, BETHESDA, MD 20814-2160 USA
issn 0099-1112
29-character source abbreviation PHOTOGRAMM ENG REM S
iso source abbreviation Photogramm. Eng. Remote Sens.
publication date JUN
year published 2000
volume 66
issue 6
beginning page 745
ending page 753
page count 9
web of science category Geography, Physical; Geosciences, Multidisciplinary; Remote Sensing; Imaging Science & Photographic Technology
subject category Physical Geography; Geology; Remote Sensing; Imaging Science & Photographic Technology
document delivery number 321CJ
unique article identifier WOS:000087437100009
CESAM authors