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Teacher Training by Distance Education with special reference to Sri Lanka

Open University of Sri Lanka OUSL
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  • Education
  • Teacher Training
  • Distance Education
  • Computer Science


Microsoft Word - Nupearchchinew89-100.doc OUSL Journal (2010) Vol. 6, (pp. 91- 102) Corresponding author: [email protected] Subsurface Geological and Hydrogeological Conditions of the Matale District, Sri Lanka: Inferred from Vertical Electrical Sounding Curves C.N. Nupearachchi1, K.M.Prematilaka 2, A.N.B.Attanayake3, G.W.A.R.Fernando4. [email protected], [email protected], [email protected], [email protected] The electrical resistivity method which has important applications in mineral resources and groundwater exploration is used to map variations in the electrical properties of the subsurface. The study area, the District of Matale forms a part of the Central Province of Sri Lanka. The major rock types of the area consist of crystalline limestone, garnet-sillimanite gneiss, charnockitic gneiss and quartzite. Fifteen vertical electrical soundings (VES) were carried out in the Matale District using the Schlumberger configuration. Initially, fifteen apparent resistivity field curves were analyzed manually. Subsequently IPI2WIN open source software was used for computational interpretation. The VES points were located mainly in three lithologies; quartzite, crystalline limestone and gneiss. Electrical conductivity of groundwater in the region was found to be uniform and had no significant salinity-based impact on the resistivity variations. The majority of resistivity layers obtained from the VES correlated with the drill logs of same points indicating a considerable degree of relevance for their application as a tool to investigate subsurface geological and hydrogeological conditions.Introduction The Direct Current (DC) resistivity method is used to measure the electrical resistivity of a geological section which includes soil, rock and groundwater. Accordingly, the method may be used to assess the lateral changes in the physical properties of the vertical cross sections of the natural geological settings. DC resistivi

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