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Controlling geological and hydrogeological processes in an arsenic contaminated aquifer on the Red River flood plain,Vietnam 总被引:1,自引:0,他引:1
Flemming Larsen Nhan Quy Pham Nhan Duc Dang Dieke Postma Søren Jessen Viet Hung Pham Thao Bach Nguyen Huy Duc Trieu Luu Thi Tran Hoan Nguyen Julie Chambon Hoan Van Nguyen Dang Hoang Ha Nguyen Thi Hue Mai Thanh Duc Jens Christian Refsgaard 《Applied Geochemistry》2008
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J. Jaunat F. Huneau A. Dupuy H. Celle-Jeanton V. Vergnaud-Ayraud L. Aquilina T. Labasque P. Le Coustumer 《Applied Geochemistry》2012
The Northern Basque Country (Southwestern France) is subject to a constant need of increasing water due to a rising population. The fissured aquifer of the Ursuya Mount is one of the main water supplies able to meet these needs. Unfortunately, there is a lack of knowledge on the residence time of groundwater and flow pattern in this strategic resource. Geochemical monitoring of groundwater was carried out from 2009 to 2011 in conjunction with CFC–SF6 measurement and with a detailed geological field characterization. It appears that groundwater flows and water geochemistry are conditioned by the development of a weathered layer overlying the fissured aquifer. When the weathered layer is absent, groundwater flows take place in unconfined conditions along fractures and fissures. The rapid circulation (mean residence time between 11 and 15 a) and the low solubility of the matrix generates low mineralization (mean about 61 μS cm−1). When a weathered layer is present, the flow depends on the degree of weathering, with groundwater circulating in the deep fissured zone in the case of a high degree of weathering. The apparent age is then between 10 and 42 a and the mineralization tends to increase concomitantly with the residence time, and particularly terrigenic element concentrations. In the case of a lesser degree of weathering, mixing between recent water from the shallow weathered layer and the oldest water (25 to >50 a) from the underlying fissured aquifer is observed. These results allow the definition of a conceptual model of flow characteristics in the study area which is also applicable to other weathered–fractured systems worldwide. 相似文献
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Geochemical processes underlying a sharp contrast in groundwater arsenic concentrations in a village on the Red River delta,Vietnam 总被引:1,自引:0,他引:1
Elisabeth Eiche Thomas Neumann Michael Berg Beth Weinman Alexander van Geen Stefan Norra Zsolt Berner Pham Thi Kim Trang Pham Hung Viet Doris Stüben 《Applied Geochemistry》2008
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Integrated biogeochemical and hydrologic processes driving arsenic release from shallow sediments to groundwaters of the Mekong delta 总被引:3,自引:0,他引:3
Benjamin D. Kocar Matthew L. Polizzotto Shawn G. Benner Samantha C. Ying Mengieng Ung Kagna Ouch Sopheap Samreth Bunseang Suy Kongkea Phan Michael Sampson Scott Fendorf 《Applied Geochemistry》2008
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