Frank Ahnert Livres

Few publications in English focus on the landforms of the Federal Republic of Germany. This book aims to address that gap, stemming from the Second International Conference on Geomorphology (Frankfurt am Main, 1989). It begins with a general introduction, followed by four key papers that discuss major landform regions, providing essential background and addressing significant questions in landform development that interest German geomorphologists. H. Liedtke examines the Pleistocene glaciations in the North German Lowlands, exploring the relationship between glacial depositional landforms and their later modifications. W. Andres analyzes conflicting interpretations of tectonic and climatic influences on Tertiary planation surfaces and Quaternary river terraces in the Central Uplands. In the South German Scarplands, H. Bremer highlights structural and climatic controls in the evolution of cuestas and valleys. K. Fischer discusses the complex nappe structure and its impact on landforms in the German Alps. The remaining papers focus on smaller regions, arranged regionally, with geographical locations provided. They delve into various themes, including structural landforms, Pleistocene glacial features, karst processes, Quaternary valley development, and the interplay between geomorphology, hydrology, and soils. A brief review of geomorphological mapping in the Federal Republic concludes the volume.

This volume includes six papers focused on slope processes and forms. Kirkby analyzes the importance of wash processes versus landslides in the formation of slope hollows. Torri discusses soil detachability theoretically, while Ai & Mi AO model landslides caused by neo-tectonic stresses. Ahnert tests a single model program for simulating process response systems across different scales, and Schmidt highlights structural and lithological factors in landform modeling on the Colorado Plateau. De Ploey & Poesen question the validity of model assumptions in slope development research. The next four papers address channel processes and forms, starting with Schick, Hassan & Lekach's probabilistic model on pebble burial and exposure during downstream transport. Ergenzinger reveals order in braided channel patterns, BAND examines tributary stream junction angles, and Wieczorek presents a geometry function for meander bends. The subsequent section on water and sediment yields begins with Yair & Enzel comparing these variables in arid and semi-arid Negev regions. Ichim & Radoane investigate ninety-nine small Romanian catchments, while RAWAT discusses current modeling knowledge. Miller assesses latent variables in water and sediment studies. The final section presents general theoretical considerations, including Hardisty's transport response function, Haigh's hierarchical structure recognition, Trofimov's geomorphological prediction appr

Das Buch erklärt die Oberflächenformen der Erde als Resultat der Prozesse ihrer Entstehung und Veränderung. Vielfältige funktionale Rückkopplungen zwischen Formen, Prozessen, geologischer Struktur und Gesteinsmaterial steuern dabei die Entwicklung geomorphologischer Systeme in allen Größenordnungen. Ergebnisse der empirischen Geländeforschung werden mit theoretischen Modellen der Formenentwicklung verknüpft. Die vorliegende vierte Auflage ist überarbeitet und aktualisiert. Aus dem Inhalt: • endogene und exogene Prozessresponssysteme • Gesteinsarten und Verwitterung • Denudation und Hangentwicklung • fluviale Formenentwicklung • Zusammenwirken von Flussarbeit und Hangentwicklung • Rumpfflächen, Pedimente und Inselberge • strukturbedingte Landformen • vulkanische Landformen • Karstformen • das glaziale System • das litorale System