All must understand about water and our water resources are very limited. Therefore we need to plan for our water resources and water supply. More brain needed not just engineering but the most important water resources and water quality. Business opportunity and money making alone cannot save our water. Water is life!

http://en.wikipedia.org/wiki/Water_resources

Water resources are sources of water that are useful or potentially useful. Uses of water includeagricultural, industrial, household, recreational and environmental activities. The majority of human uses require fresh water.! The framework for allocating water resources to water users (where such a framework exists) is known as water rights.