1- Introduction
Water plays a vital role in a country's economy. Water has been critical to the making of human history. The earliest agricultural communities emerged where crops could be cultivated with dependable rainfall and perennial rivers. Simple irrigation canals permitted greater crop production and longer growing seasons in dry areas. Some of the problems faced by the world population are as below.
• More than a billion people lack access to clean drinking water, these include people from the sub continent (India, Pakistan, Bangladesh)
• Two and half billion people of the world don’t have proper sanitation services
• Preventable water related diseases kill a lot of people around the world every day
• Many people from Pakistan, India and Bangladesh drink contaminated water
• Many developing populations throughout the world are intensifying the pressure on limited water supply
Water is a main source of life and unfortunately, that source is becoming extinct in some parts of the world, not that these parts do not have water. Water plays a vital role in a country's economy. Although about 88 per cent of water is used in the agriculture sector, the industry, commerce and public health are also greatly affected by the quantity and quality of the available water. “Water is an essential element for our survival.
According to the United Nations Development Program (UNDP 1990), integrated water resources management is based on the perception of water as an integral part of an ecosystem, a natural resource, and a social and economic good.
2- Pakistan: An overview
“The Islamic Republic of Pakistan, the second largest South Asian nation, has a total population of 146 million and a land mass of 79.61 million hectares (ha), of which 70 million ha is arid and semi-arid (including 11 million ha of deserts). The country has a great variety of landscapes ranging from the high mountain ranges of the