Recent landslide activity in Manaihan, East Belgium
Source: Landslides, Volume 1, Number 4, December 2004 , pp. 305-310(6)
Abstract:Past landslides have been recognized in the Battice area in E-Belgium. In contrast to the other inactive landslides, the Manaihan landslide responded immediately to heavy rainfall events in the last two decades. This study aims to map its spatial extent and the dominant surface features; to measure surface displacement using GPS; to investigate subsurface structure with Cone penetration test (CPT) and corings; and to determine the depth of the shear surface by inclinometers. Results show a partial landslide reactivation. Surface velocities range between 20 and 40 cm/year and are strongly dependent on winter rainfall. CPT results give clear boundaries between the landslide mass and the undisturbed bedrock in the head scarp. Distinct shear surfaces have been determined with displacement rates up to 15.8 mm in 21 days. Further research should apply geophysical methods for two-dimensional information on the ground, investigate geotechnical properties of the landslide mass, model slope instability, and determine the influence of a sewage pipe crossing the central landslide mass as a potential cause for landslide activity.
Document Type: Research Article
Affiliations: 1: Dept. of Physical Geography and Quaternary, University of Liège, Allée du 6 Août, 2 Sart Tilman (Bât. B11), 4000 Liège, Belgium, 2: Dept. of Geography, University of Bonn, Meckenheimer Allee 166, 53115 Bonn, Germany, Email: email@example.com
Publication date: December 2004