Title: Contributions of floodplain stratigraphy and evolution to the spatial patterns of groundwater arsenic in Araihazar, Bangladesh
Abstract: Research Article| November 01, 2008 Contributions of floodplain stratigraphy and evolution to the spatial patterns of groundwater arsenic in Araihazar, Bangladesh Beth Weinman; Beth Weinman † 1Earth and Environmental Sciences, Vanderbilt University, Nashville, Tennessee 37235, USA †E-mail: [email protected]; phone: 615-322-2976; fax: 615-322-2138 Search for other works by this author on: GSW Google Scholar Steven L. Goodbred, Jr.; Steven L. Goodbred, Jr. 1Earth and Environmental Sciences, Vanderbilt University, Nashville, Tennessee 37235, USA Search for other works by this author on: GSW Google Scholar Yan Zheng; Yan Zheng 2Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York 10964, USA 3Queens College, City University of New York, Flushing, New York 11367, USA Search for other works by this author on: GSW Google Scholar Zahid Aziz; Zahid Aziz 4Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York 10964, USA Search for other works by this author on: GSW Google Scholar Michael Steckler; Michael Steckler 4Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York 10964, USA Search for other works by this author on: GSW Google Scholar Alexander van Geen; Alexander van Geen 4Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York 10964, USA Search for other works by this author on: GSW Google Scholar Ashok K. Singhvi; Ashok K. Singhvi 5Physical Research Laboratory, Navrangpura, Ahmedabad, India 380 009 Search for other works by this author on: GSW Google Scholar Yogesh Chand Nagar Yogesh Chand Nagar 5Physical Research Laboratory, Navrangpura, Ahmedabad, India 380 009 Search for other works by this author on: GSW Google Scholar GSA Bulletin (2008) 120 (11-12): 1567–1580. https://doi.org/10.1130/B26209.1 Article history received: 25 Feb 2007 rev-recd: 01 Oct 2007 accepted: 09 Oct 2007 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Beth Weinman, Steven L. Goodbred, Yan Zheng, Zahid Aziz, Michael Steckler, Alexander van Geen, Ashok K. Singhvi, Yogesh Chand Nagar; Contributions of floodplain stratigraphy and evolution to the spatial patterns of groundwater arsenic in Araihazar, Bangladesh. GSA Bulletin 2008;; 120 (11-12): 1567–1580. doi: https://doi.org/10.1130/B26209.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Extreme spatial heterogeneity has emerged as a salient characteristic of groundwater arsenic in many complex fluviodeltaic environments. Here we examine patterns of arsenic heterogeneity in the shallow (<23 m) groundwaters of a well-studied floodplain setting in Araihazar, Bangladesh. Ninetyfive augers and 200 shallow wells sampled at spacings of 101–103 m in the 25 km2 area indicate that the concentration of arsenic in shallow groundwater largely varies with the grain size, thickness, and distribution of fine-grained (<63 μm) sediments that overlie buried aquifer sands. The overall pattern shows that lower arsenic concentrations are typically found where aquifer sands outcrop at or near the surface, whereas higher arsenic levels typically underlie, or are adjacent to thicker, fine-grained deposits. Furthermore, chronostratigraphic reconstructions of aquifer sediments indicate that sediment distribution, and consequently the patterning of dissolved arsenic, is readily explained in the context of local river history and flood-plain development within the past 1000 yr. An important implication is that complex patterns of groundwater arsenic in afflicted fluviodeltaic settings can be better understood through reconstructions of local aquifer history. This finding is especially relevant because the village and tube-well locations are closely linked with surface landforms such as former levees and bars. An additional and worrisome finding is that the artificial filling of villages to protect from flooding can mimic the natural fine-grained stratigraphy commonly associated with high concentrations of arsenic. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Publication Year: 2008
Publication Date: 2008-10-29
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 91
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