Abstract:
The instability of the slope area at Mahawewa, Walapane has been identified as
a major threat to the people and properties of the vicinity since 1986. Therefore, National
Building Research Organization has started a project of monitoring and stabilization of
the slope, cooperating with the Japan International Cooperation Agency in 2010. Main
involvement of this study was to do the monitoring part. It is mainly based on analysis of
un-stabilization parameters of the area which measured using five instruments. That is
horizontal movement at sub surface using Inclinometer, fluctuation of ground water
level using Piezometers, characteristics of slip surfaces using Strain Gauges, movement of
the surface using Extensometers and rainfall using Rain Gauges. In addition drill log data
of the site, visual information of cracks generated and springs available were also used.
Global Positioning System survey was carried out for preparation of a map in this
particular area. Finally, according to the results and conclusions gained from monitoring
of the landslide, a suitable mitigation method was proposed.
Citation:
Idirimanna, I.A.N.D., Perera, K.A.C., Bandara, K.M.T., Kumara, W.G.B.T., Indrathilake, H.M.L., Premasiri, H.M.R., Weerawarnakula, S.W., & Abeysinghe, A.M.K.B. (2011). Instrumentation and monitoring of Mahawewa landslide off Walapane. In N. P. Ratnayake & A.M.K.B. Abeysinghe (Eds.), Proceedings of the 6th National Conference on Minerals and Innovative Thinking (pp. 17-20). Department of Earth Resources Engineering, University of Moratuwa
