水土保持是防治水土流失、保护、改良和合理利用山丘区和风沙区水土资源,维护和提高土地生产力以利于充分发挥水土资源的经济效益和社会效益,建立良好生态环境的事业。水保持对水利的可持续发展具体重要的作用和意义。 Soil and water conservation is a cause of preventing and controlling soil and water loss, protecting, improving and making rational use of water and soil resources in hill and windy areas, maintaining and improving land productivity in order to give full play to the economic and social benefits of water and soil resources and establish a good ecological environment. Water conservation has a very important role and significance in the sustainable development of water conservancy.