The role of groundwater in cliff instability: an example at Cape Blanc-Nez (Pas-de-Calais, France)
| Autor: | Guillaume Pierre, Philippe Lahousse |
|---|---|
| Přispěvatelé: | Groupe d'Étude sur les Géomatériaux et Environnements Naturels, Anthropiques et Archéologiques - EA 3795 (GEGENAA), Université de Reims Champagne-Ardenne (URCA)-SFR Condorcet, Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS)-Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS)-Maison des Sciences Humaines de Champagne-Ardenne (MSH-URCA), Université de Reims Champagne-Ardenne (URCA)-Université de Reims Champagne-Ardenne (URCA) |
| Rok vydání: | 2006 |
| Předmět: |
Hydrology
geography geography.geographical_feature_category 010504 meteorology & atmospheric sciences Boulonnais education Geography Planning and Development Calais 010502 geochemistry & geophysics 01 natural sciences humanities cliff retreat 13. Climate action Cape groundwater 'piston flow' mechanism Earth and Planetary Sciences (miscellaneous) Cliff Spatial variability [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology Physical geography Geology Groundwater 0105 earth and related environmental sciences Earth-Surface Processes |
| Zdroj: | Earth Surface Processes and Landforms Earth Surface Processes and Landforms, Wiley, 2005, 31, pp.31-45. ⟨10.1002/esp.1229⟩ |
| ISSN: | 1096-9837 0197-9337 |
| DOI: | 10.1002/esp.1229 |
| Popis: | Cliff retreat in northern Boulonnais is described. The distribution of the amount of retreat is related to structural and topographic factors. Both control the runoff–infiltration balance and therefore the mechanical behaviour of the rocks, which determines the modes of failure. The spatial variability of the retreat rate is explained, but predicting the temporal variability of the retreat rate, which is central to risk management, is much more difficult. Rainfall and piezometric surface data enhanced a ‘piston flow’ mechanism during November 2000. The result of its occurrence on the stability of the cliff and conditions of its recurrence are examined with a view to better understanding the rate of recession of coastal cliffs and wiser management of risk. Copyright © 2005 John Wiley & Sons, Ltd. |
| Databáze: | OpenAIRE |
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