可持续性是一个相对的概念 ,必须与变化的环境一起加以考虑。水资源系统是人类生存及获取福利的基础。土和流域、江河、湖泊、地下水等的开发正面临日益严峻的困难。人们希望能为自己和下一代开发利用水资源系统 ,我们的后代希望我们为他们做些什么或不做什么。搞清这些可能的影响并进行综合考虑是水资源规划和管理者长期的任务 ,需要其他学科的专业人员共同参与。 Sustainability is a relative concept that must be considered together with changing circumstances. The water system is the basis for human survival and welfare. The development of soil and river basins, rivers, lakes and groundwater are facing increasingly serious difficulties. People want to develop and utilize water systems for themselves and their neighbors, what future generations want us to do for us or not. Finding these possible impacts and taking them into consideration is a long-term task for water resource planning and managers that require the involvement of professionals from other disciplines.