Land Slide : A Key Problem in Uma Uya Project Risk Controlling
In this paper, using landslide risky zones best possible places to arrange the buildings and equipments were found in Uma Uya project. The risky zones of the project is achieved and presented. Uma Uma project is a multipurpose project. Uma Oya is a major tributary of Mahaweli Ganga originating from Nuwara Eliya. The Oya traverses Welimada and Kandaketiya in Badulla district. Its confluence with Mahaweli Ganga is just above the Rantabe reservoir. Landslides are aggravated by human activities. Activities include deforestation, cultivation and construction. Main causes can be vibrations from machinery, blasting, earthwork which alters the shape of a slope, removal of deep rooted vegetation and construction. As it can be seen from results the main risky zones are located at high levels of the site. It is clear from results that about %30 of the site zones are involved in high risky landslide. While, about %50 of zones are low risky zones and about %20 of zones are no risky zones. Thus, site mobilization in such zones is dangerous.
Landslide Morphology and Processes on Santa Cruz Island, California
An episode of unusually intense rainfall triggered over a thousand landslides on Santa Cruz Island, California, during the winter of 1977-78. These included large, deep-seated failures, composite mudflows, and hundreds of shallow soil slips. In this study, landslide occurrence is examined in relation to lithologic, pedologic, topographic, and vegetational conditions. Their effects on soil permeability, water movement patterns, and shear strength are found to be related to landslide morphology and process.
COASTAL MUDSLIDE MORPHOLOGY AND PROCESSES ON EOCENE CLAYS IN DENMARK
Prior, D.B.: Coastal Mudslide Morphology and Processes on Eocene Clays in Denmark. Geografisk Tidsskrift 76: 14–33. Kobenhavn, juni 1, 1977. The study deals with three localities: Rojle Klint, Rosnaes and Helgenaes concerning shallow mudslides. The mudslide morphology at the three slides is described together with detailed laboratory analysis of the characteristics of the eocene clays, i.e. to relate the field characteristics of the mudslides and their associated processes to the geotechnical and geochemical properties of the clays. The significans of postglacial changes in land-sea level relationship to land slide morphology consider the time scale of variations in coastal activity.