Pakistan is one of the world’s most arid countries, with an average rainfall of under 240mm per year. The population and economy heavily depends on water. There is an annual influx of about 180 billion cubic meters of water in Indus River System. It emanates from the neighboring countries and is mostly derived from snowmelt in the Himalayas. Pakistan is faced with an emerging water crisis in various forms, like irrigated agriculture, municipal, rural water supply and sanitation, maintenance of supply systems, flood management, drought management, water quality and trans-boundary water sharing.