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Accueil du site → Doctorat → Allemagne → 2016 → Geological mapping of Eastern Syria by using remote sensing and GIS. Characterization of the Euphrates water system

Technische Universität Berlin (2016)

Geological mapping of Eastern Syria by using remote sensing and GIS. Characterization of the Euphrates water system

Alibrahim, Mohammad Ali

Titre : Geological mapping of Eastern Syria by using remote sensing and GIS. Characterization of the Euphrates water system

Auteur : Alibrahim, Mohammad Ali

Université de soutenance : Technische Universität Berlin

Grade : Doktor der Naturwissenschaften - Dr. rer. nat.- 2016

Résumé
Syria is located in the north of the Arabian Peninsula and is one of the Middle East countries that are rich with natural resources (water, oil, gas and vegetation). This study deals with this issue by applying remote sensing and GIS to build up a geodatabase, and subsequently, geological investigation, geological mapping, and an evaluation of the Euphrates water, and aims to give suitable suggestions and management methods for this region of vital importance to the population of Syria. The study area is located between Latitude 35º - 37º north and Longitude 38º - 42º east ; the structure situation of which is very complex. This study relied on available data such as remote sensing (8Landsat ETM 2007, Landsat MSS 1975, Spot 2005 and Aster 2008), a digital elevation model DEM, meteorological, geomorphological, lithological, hydrological, hydrogeological and chemical data. The eight Landsat ETM images were pre-processed, georeferenced and mosaicked. Spot and Aster images were georeferenced as image to image. Suitable digital image processing methods were implemented to enhance the satellite data. After the above processing steps, two supervised classification algorithms, Maximum likelihood classification (MLC) and Minimum distance were applied to both the Landsat ETM 2007 and Landsat MSS 1975 data. The evalutaion showed that the MLC has represented the higher accuracy with 76.92 %. The lithological units have been delineated and compared with the old geological maps and a digital geological map on a scale of 1:200,000 was produced. Fifty seven water samples from Euphrates river, wells and drainage channels have been analysed chemically in order to evaluate the water and check its suitability for portable water. The study has shown that the Euphrates water is suitable for drinking and irrigation. Fifty four topographic maps based on the scale of 1:50,000 were used in the study. The maps were georeferenced and the contour lines with the interval of 5 m were digitized and the contour map was created. A drainage map was also created from the topographic maps. To diminish the loss of water by evaporation and to protect the river from the risk of floods, four dams have been proposed to be constructed. A Data bank was constructed by ArcGis and PgAdmin softwares and connected with the web mapping server.

Mots clés  : geological mapping Eastern Syria remote sensing GIS tectonic units image classification water quality Euphrates depression web mapping geologische Kartierung Ostsyrien Fernerkundung geographische Informationssysteme tektonische Einheit Bildklassifikation Wasserqualität Euphrat-Graben

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