We are aiming to develop the conservation and recycling technology of sustainable water resources that can answer the continuing needs of the society on the basis of a quantitative grasp of the hydrological impacts including evapotranspiration and rainfall during the hydrologic process of the natural world studied mainly from the agricultural sector. To be specific, through the proposal related to the design of water storage facilities, water transmission and deliverage facilities with attention paid to water quality problems such as eutrophication, etc., the proposals about environment improvement and research while paying attention to the ecosystem of the water environment, and proposals for measurement technology and facility design for contributing to watershed flood control in rural areas, the educational research also containing the evaluation method itself will be conducted based on the results above.