1. Introduction 

          Water plays a very essential role in human life. In his royal speech, King Bhumibhol says: “The important thing is we must have water for drink and agriculture. Wherever people exist, they can live if there is water. But if there is no water, they cannot live. On the contrary, if there is no electricity, one can live. If, however, there is electricity but no water, one cannot live.” 

           According to Ismail Serageldin, Vice President of World Bank, the war in the twentieth century resulted from the fight for oil. Yet the war in the twenty-first century will be the battle for water. In this regards, we sees the water war in several countries, for example, India, Bangladesh, Sudan, Egypt, and Kenya. The United Nations thus warns: “In the future, there will be a water crisis which leads to more water wars on international stage.” 

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