GIS-based landslide hazard mapping in the Scotland District, Barbados
The Scotland District occupies an area of approximately 60 km2 forming the northeast coastline of Barbados (Fig. 1). The district is geologically and topographically distinct from the rest of Barbados in that the coral limestone cap that covers the remainder of Barbados is absent. The underlying Tertiary rocks exposed in the Scotland District are soft and erodible, and are themselves prone to landsliding and erosion. Land use in the district comprises forest, sugar cane, fruit and vegetable growing and pasture, and the district has high landscape value and eco-tourism potential. Low rise, low density housing has developed over the decades, predominantly along cart tracks and roads with alignments that tend to follow ridge and spur lines in an attempt to avoid potentially unstable side-long ground. However, there are numerous locations where erosion and ground movements have caused significant distress to road pavements, and where foundations to residential buildings have been undermined to the extent that some areas have been abandoned altogether.
The Soil Conservation Unit (Ministry of Agriculture and Rural Development) has been tackling slope instability and erosion problems in the district for over half a century. A number of useful projects have been commissioned to examine and remediate areas of known ground instability, and several schemes involving drainage and earthworks have proved successful. However, realizing that there were several geological, topographical, drainage and land use factors distributed throughout the district that had a role to play in the pattern of ground instability and erosion, the Soil Conservation
Figures & Tables
This volume presents a collection of papers on techniques and case studies in land surface evaluation for engineering practice written by specialist practitioners in the field. The volume arose out of deliberations by the Second Working Party on Land Surface Evaluation set up by the Engineering Group of the Geological Society in January 1997 and chaired by Dr. J. S. Griffiths. The book examples of cost-effective methods for collecting land surface and near surface data prior to carrying further detailed ground investigations of engineering geologist, geotechnical engineers, geomorphologist and planners who have the responsibility for planning a designing investigations of potential sites of development.