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sur le développement des zones arides et semi-arides

Titre : Klimageomorphologische Studien in Zentral-Namibia : Ein Beitrag zur Morpho-, Pedo- und Ökogenese

Geomorphological, Pedological and Geoecological Studies in Central Namiba : a contribution to landscape history

Auteur : Kempf, Jürgen

Université de soutenance : Julius-Maximilians-Universität Würzburg

Grade : Dissertation zur Erlangung des naturwissenschaftlichen Doktorgrades 2003

Résumé
The thesis presents results from long-term geomorphological, pedological and ecological research in Namibia. It focuses on a west-east transekt in the central part of the country between the Tropic of Capricorn and the Etosha Region. The transekt follows a climatic-geomorphological gradient from the Namibian shelf, the litoral region, the Namib peneplain, the escarpment with its forelands, the central highlands with the Windhoek-Okahandja basin up to the continental Kalahari basin. Shelf, pre-escarpment area and basins represent potential landscapes of sediment accumulation, peneplains and highland areas landscapes of correlative denudation and erosion. Climatic conditions, geomorphological features and processes, ecology, soils and vegetation of accumulative and denudative landscapes have been described and analysed. Recent and sub-recent geomorphological and geo-ecological processes have been combined with climatic data and a ecosystem model for Namibia was developed. The model was used to interpret geomorphological features and remnants of different ages in a historical chronology. A distinct history of geomorpholocical environments in Namibia was reconstructed. In addition palaeoecological and geo-archaeological proxy data were used to verify the interpretation.

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