水对一切生物来说都是十分重要的,对人粪来说,则是最珍贵的资源之一。在许多方面,如饮用、运输、卫生、国防、灌溉、工业及水力发电等,人类一直长期依靠它。近年来,水的新用途包括生态学,娱乐及低温高温地热能等,在诸多领域中它将发挥日益巨大的作用。 人们承认地下水在水文循环中的地位已有三个世纪,但从实践角度来看,只是近几十年来,才有少数国家的水资源规划人员及负责水利工程的工程师把地下水和地表水统一规划利用,多数情况下,规划及设 Water is very important to all living things, and to human excrement it is one of the most precious resources. In many ways, mankind has long relied on it for drinking, transportation, health, defense, irrigation, industrial and hydroelectric power. In recent years, new uses of water, including ecology, entertainment and low temperature and high temperature geothermal energy, will play an increasingly important role in many fields. It has been recognized for three centuries that groundwater has played its part in the hydrological cycle, but from a practical point of view, it is only in recent decades that a few national water planners and engineers in charge of water conservancy projects have made unified planning and utilization of groundwater and surface water In most cases, planning and design