||In order to preserve water quantity, to protect water quality, and to conserve soil and water resources, it is necessary to institute appropriate land use regulations in a watershed. In general, it is included water resources utilization, water quality control and management. Therefore the major topics are water resources tendency, water law, water right, point and non-point sources pollution control, ground water management, public participation, ecological working method, etc. With appropriate public participation, the government can work together with people in community development in a manner which will enrich local cultural characteristics, and provide ideas for a sustainable growth, which would lead to a high quality of life and also would protect the watershed's ecology . The ultimate goal of making these efforts is to achieve a " water-soil-trees-men ", four-win situation.