Simulating Impacts of Irrigation on the Hydrology of the Karagan Lagoon in Sri Lanka

Abstract

"Part of IWMI's research focuses on assessing the impact of large-scale irrigation systems on the biodiversity of natural ecosystems. One such study monitors the impact of the extension of the Uda Walawe irrigation scheme in southern Sri Lanka. Phase two of the Uda Walawe left bank extension project will extend the main canal by 19 km, divert large quantities of water into the area, irrigate an additional 5150 ha, lead to a major change in land use and facilitate the settlement of almost four thousand families. With completion targeted for 2004, this irrigation project provides a unique opportunity to assess the pre-development status as well as to monitor ongoing changes."