Sediment geochemistry of a shallow (6-m average) reservoir (Lake Waco) was evaluated for the spatial distribution of major and trace elements. Sixty bottom and core samples along a 21-km transect within the reservoir, 18 overbank sediment samples, and 8 rock types in the drainage area were collected and analyzed for major (Al, Ca, Fe) and trace elements (As, Ba, Cr, Cu, Hg, Mn, Ni, Pb, Sr, V, Zn). Elemental concentrations in the reservoir sediments closely correspond to concentrations in the regional rocks and represent a mixture of overbank sediment composition of the tributaries. Elemental concentrations were statistically regressed against Al concentrations in order to establish regional baseline levels and thereby distinguish natural from anthropogenic sources. Spatial geochemical trends, considered in terms of element-to-Al ratio versus V-to-Al ratio, relate to the natural and anthropogenic sources contributing to the elemental concentrations. The spatial elemental distribution in the reservoir, which receive sediments from two mineralogically contrasting basins, reflect textural and mineralogical transition within the reservoir and suggest a progressive mixing of sediment from the tributaries. The spatial elemental distribution and sediment texture suggest that the sediment-source, which determines the sediment-type, has a greater influence on the major- and trace-element distributions in shallow reservoir sediments than bathymetry.
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Similar content being viewed by others Explore related subjectsDiscover the latest articles and news from researchers in related subjects, suggested using machine learning. Author information Authors and AffiliationsDepartment of Geology, Baylor University, Waco, Texas 76798, USA Tel: +1 254 710 1111 x 6814 · Fax: +1 254 710 2673 e-mail: abraham@earthlogic.baylor.edu, , , , , , US
J. Abraham
Received: 25 September 1997 · Accepted: 3 February 1998
About this article Cite this articleAbraham, J. Spatial distribution of major and trace elements in shallow reservoir sediments: an example from Lake Waco, Texas. Environmental Geology 36, 349–363 (1998). https://doi.org/10.1007/s002540050351
Issue Date: December 1998
DOI: https://doi.org/10.1007/s002540050351
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