近来,我国地下水的状况成为一个社会关注热点,频频曝光的地下水污染、地下水资源日益枯竭等问题敲响了警钟,合理利用和保护地下水资源刻不容缓。看不见的地下水撒哈拉沙漠东部地下深处的努比亚砂岩地下水层,目前正处于困境之中。早在2000多年前,它就是世界上最大最古老的地下储水层之一,为利比亚、埃及、乍得和苏丹等国提供水资源。但现在,它即将枯竭。在埃及,人们不断地抽取地下水,以供 Recently, the situation of groundwater in our country has become a hot topic of social concern. The frequent exposure of groundwater pollution and the depletion of groundwater resources have sounded the alarm and the reasonable utilization and protection of groundwater resources are imperative. Invisible groundwater The Nubian sandstone groundwater layer deep in the eastern part of the Sahara Desert is currently in a dilemma. As early as 2000 years ago, it was one of the largest and oldest underground aquifers in the world, providing water resources for Libya, Egypt, Chad and Sudan. But now it is drying up. In Egypt, groundwater is continually extracted for use