Landsat Imagery Interpretation Of Dukhan Sabkha, Western Qatar, The Arabian Gulf

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Landsat Imagery Interpretation Of Dukhan Sabkha, Western Qatar, The Arabian Gulf

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Title: Landsat Imagery Interpretation Of Dukhan Sabkha, Western Qatar, The Arabian Gulf
Author: El Kassas, I. A. [ابراهيم علي القصاص]; Nasr, Bassam A. [بسام احمد النصر]
Abstract: In western Qatar, Dukhan Sabkha occurs some 6 to 8km from the coast of the Gulf of Salwa. It occupies an elongated depression covering an area of some 130km2 of nearly flat land, with an average elevation ranging from 2.8m to 1.8m relative to the mean sea level. In the present work, Landsat imagery data have been interpreted to delineate the major morphologic features of this sabkha, and to investigate its surface materials in an attempt to elucidate their origin. The satellite data used include black-and-white images of the MSS bands 4, 5 and 7, their false-colour composites, and the colour-sliced images of band 5. The visual interpretation of these images has been corroborated by intensive field work and compilation of all available published information. This study led to an accurate delineation of the boundaries of this inland sabkha and its classification, for the first time, into three main tonal units of characteristic spectral signatures on Landsat-MSS images. These units are named according to their abundant constituent as : (1) calcareous sandy slits, (2) gypsiferous clays, and (3) salt crust. In addition, wherever halophytic plants are growing they display relatively darker tones on the Landsat images.
URI: http://hdl.handle.net/10576/8411
Date: 1991

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