Mahaweli Authority of Sri Lanka (MASL) is a government agency that is responsible for water resources of Mahaweli and allied six river basins, which has influence on national water management. Through the release of water to adjacent river basin covers, its direct influence extends to more than half of Sri Lanka. Their main objectives are to increase agricultural production, hydro-power generation, employment opportunities, settlement of landless poor and flood control. MASL is directly involved with many aspects of Sustainable Development Programs. They have experienced staff, data on environment aspects which are related to Mahaweli river and surrounding areas.