Engineering and environmental problems in karst — An introduction
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- 作者：Mario Parise ; Jo De Waele ; Francisco Gutierrez
- 关键词：Scholarships ; Girls education ; Tuition fees
- 刊名：Engineering Geology
- 出版年：2008
- 出版时间：23 June 2008
- 年：2008
- 卷：99
- 期：3-4
- 页码：91-94
- 全文大小：116 K
文摘
The study of karst aquifers in Lebanon shows values of k > 0.5, and even 1; former data from the literature show that other karst springs in Middle East have comparable characteristics. In fact, what is not considered by Mangin and others, k is equivalent to a mean residence time in years of water in the saturated zone. So long residence times are normally observed in poorly karstified aquifers, or containing abandoned, not functioning karstification. The geological framework in which the studied springs are located in fact shows that these aquifers have been subject to a long, complex evolution, as a consequence of the base level rising. This rising produced the flooding of the successive karst drainage network, which does not really function anymore and provides a large storage capacity to the aquifer. The very interesting properties of these aquifers make them prime targets for fulfilling the increasing needs of water.