Hydrologic and economic feasibility of reducing soil salinity problems in the mahaweli river irrigation system H area, srilanka

摘要

This study explores the magnitude and feasibility of reducing the salinity problem in the Mahaweli river irrigation system in Sri Lanka. Data was collected in 1998 from irrigation blocks that were close to and further away from the major reservoir. Soil pH and EC were estimated. Production function decomposition and benefit cost analysis were employed to determine the optimal level of soil salinity in the area. Salinity has reduced rice productivity by 33