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Accueil du site → Doctorat → Allemagne → Applications of remote sensing and geographic information systems in geomorphological studies : Safaga - El Quseir area, Red Sea coast, Egypt as an example

Johannes Gutenberg-Universität Mainz (2008)

Applications of remote sensing and geographic information systems in geomorphological studies : Safaga - El Quseir area, Red Sea coast, Egypt as an example

Badawy, Moawad

Titre : Applications of remote sensing and geographic information systems in geomorphological studies : Safaga - El Quseir area, Red Sea coast, Egypt as an example

Auteur : Badawy, Moawad

Université de soutenance : Johannes Gutenberg-Universität Mainz

Grade : Doktor der Naturwissenschaften 2008

Résumé
During the last three decades remote sensing and GIS have become increasingly important tools for improving the conventional methods of data collection and map production in geosciences. The present work represents an endeavour of applying remote sensing and geographic information systems (GIS) in geomorphological studies. Several objectives form the main scope of the study of which assessing the capability of using and integration of remote sensing and geographic information systems to discern the main geomorphologic units is the most important one. To fulfil these objectives, different data and methods are used. The thesis consists of six chapters, chapter one manifests the general setting of the study area. It illuminates the main morphological units and reveals the foremost aspects of the area such as climatic conditions, aridity indices, coastal environment, and cultural manifestations. Chapter two signifies types and ages of the litho-stratigraphy and the regional structure. Several attempts are achieved to discriminate the main rock formations from the ETM+ image such as colour band composite, image ratioing, and supervised classification. Chapter three is concerned with structural landforms to clarify the interaction between tectonics and geomorphic processes. Within this chapter a variety of advanced methods of image processing are applied for mapping and detecting lineaments. Directional and non-directional spatial filters are widely applied to reveal the main linear features. Chapter four comes as an attempt to signify a standard method for automation extraction of drainage networks from the processed SRTM images. The study discusses the validity and competence of extracting such small-scale drainage networks from the SRTM image in comparison with topographic maps. Hydrological significances are also argued via qualitative and quantitative analysis of the drainage systems. Chapter five presents an assessment of flash floods and vulnerability analysis. Probability of annual occurrence and return period are computed in a historical framework since 1921. Rain deep over the Red Sea Terrain is interpolated using IDW (Inverse Distance Weighted) method and it is involved in estimating probable runoff. The study pointing out the synoptic weather pattern leads to torrential rain based on METEOSAT infrared images for the period 1990-1997. Flood potentiality is assessed using some hydro-morphometric parameters and flood magnitude is weighted as a function of flood potentiality, runoff characteristics, and human interferences. Eventually, chapter six is interested in distinguishing the coastal forms such as coastal cliffs and wave-cut platforms, depositional, submerged and submarine forms, and the raised coral terraces and their relative ages in comparison with different locations along the Egyptian Red Sea Coast.

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Page publiée le 16 octobre 2008, mise à jour le 11 janvier 2019