Abstract
Mass wasting in most of its forms have been studied throughout Ghana. The studies covered extent, distribution, effect, and possible corrective measures of slope failures. The performance of a number of slopes have been monitored for long periods and results have served as a basis for re-examination of existing design criteria in Ghana. Back, analysis of one major failure has been performed to obtain velocity and reach of a landslide. From, damage to farms, timber and a road from landslide in one instance, a projection is made to obtain the economic significance of landslides in Ghana. From the mode of failure in one specific case a methodology for corrective measures has been proposed.
Résumé
Les mouvements de terrain sous pratiquement toutes les formes ont été étudiés pour l'ensemble du Ghana Les études ont concerné la réparation des ruptures observées sur les pentes, leur étendue et les mesures correctives possibles. Le comportement d'un grand nombre de pentes a été mesuré sur de longues périodes et les résultats obtenus ont servi de base au reexamen des critères utilisés pour la conception des projects. L'étude a posteriori d'une rupture majeure a été utilisée pour mesurer la vitesse de déplacement et la portée d'un glissement de terrain. A partir des dommages constatés sur des fermes, des forêts et une route, une estimation des conséquences économiques des glissements de terrain au Ghana est tentée. En se fondant sur le mode de rupture observé dans un cas précis, une méthodologie est proposée pour les mesures correctives.
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Ayetey, J.K. The extent and effects of mass wasting in Ghana. Bulletin of the International Association of Engineering Geology 43, 5–19 (1991). https://doi.org/10.1007/BF02590165
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DOI: https://doi.org/10.1007/BF02590165