R.H.K. Ranasinghe’s scientific contributions

What is this page?


This page lists works of an author who doesn't have a ResearchGate profile or hasn't added the works to their profile yet. It is automatically generated from public (personal) data to further our legitimate goal of comprehensive and accurate scientific recordkeeping. If you are this author and want this page removed, please let us know.

Publications (1)


Figure2. Overall plan of the mini cricket ground (Courtesy of Sri Lanka Land Reclamation and Development Corporation) Air Permeability (ka) controls air flow due to air pressure differences in soil. Air permeability (ka) shows high spatial variability and scale dependency due to soil heterogeneity. Under laminar flow conditions, the advective flow of gas through porous media follows Darcy's law. Darcy's Law was used to calculate air permeability of the soil samples, ........(1) 
Effect of cover soil selection and compaction on gas transport and water retention
  • Article
  • Full-text available

January 2011

·

R.H.K. Ranasinghe

·

·

In Sri Lanka, engineered landfills are not usually available and the common procedure is to cover the waste with a good cover soil without providing gas venting facilities. Hence, hazardous gaseous and liquids from landfills emit through this cover soil. Therefore, studying the cover soil parameters are of paramount importance in evaluating its future gas diffusion. The Soil gas diffusion coefficient (D p) and Air permeability (k a) govern the transport and emission gases in the unsaturated zone. In this study, soil gas diffusivity (D p/D o, D o is gas diffusion coefficient in free air) and k a were measured for the final cover soil of Maharagama landfill at different soil water matric potentials. k a and D p/D 0 were measured as a function of air filled porosity (s) at different water contents. Finally, it is concluded that final cover soil of Maharagama waste disposal site is a material very low gas exchangeable capacity ie it is a good capping soil.

Download