Estimates for the life of the Nubian sandstone aquifer range from a century to a millennium.
2
根据穿越处地貌及地层特性决定将努比亚砂岩作为定向钻穿越的围岩。
Based on the features of geomorphology and strata in the crossing area, the Nubia sandstone is selected to be the surrounding rock.
3
世界上最大的努比亚砂岩蓄水系统，位于撒哈拉沙漠东部地区下面，跨越利比亚、乍得、苏丹和埃及。
The Nubian Sandstone Aquifer System, the world's largest, is located under the eastern part of the Sahara desert and spans the political boundaries of Libya, Chad, Sudan and Egypt.
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