文章基本信息

标题：The groundwater geochemistry of the Saloum delta aquifer: Importance of silicate weathering, recharge and mixing processes
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作者：Serigne Faye ; Mamadou Issa Ba ; Moctar Diaw 等
期刊名称：African Journal of Environmental Science and Technology
电子版ISSN：1996-0786
出版年度：2010
卷号：4
期号：12
页码：815-830
DOI：10.5897/AJEST09.180
语种：English
出版社：Academic Journals
摘要：The physical-chemical and isotopic characteristics of the groundwater in the Saloum detrital aquifer system obtained from a network of 74 sampling points have indicated the likely geochemical reactions and defined the groundwater flow regime in the context of a semi-arid region. The main geochemical zones with distinct water types and isotopic contents displayed through this investigation are the results of ion exchange reactions, both congruent and incongruent reactions of carbonate, silicate minerals combined with effects of recharge/ discharge by evaporation and salinization processes in the vicinity of the estuary system. Use of minor and trace elements against the conservative ions of Cl and Br supports the highly weathering processes of the aquifer matrix which seem even to affect by incongruent reactions the oxide and hydroxide minerals under aerobic conditions. In this region, recharge is highly heterogeneous and recent recharged waters as well as preferential flow paths have been evidenced using stable isotopes of18O and2H together with radioactive 3H.
关键词：Hydrochemistry; stable isotopes; radioactive isotope; groundwater recharge; salinization