Use of sediment-trace element geochemical models for the identification of local fluvial baseline concentrations
By: A. J. Horowitz, K. A. Elrick, C. R. Demas, and D.K. Demcheck
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Abstract
Studies have demonstrated the utility of fluvial bed sediment chemical data in assesing local water-quality conditions. However, establishing local background trace element levels can be difficult. Reference to published average concentrations or the use of dated cores are often of little use in small areas of diverse local petrology, geology, land use, or hydrology. An alternative approach entails the construction of a series of sediment-trace element predictive models based on data from environmentally diverse but unaffected areas. Predicted values could provide a measure of local background concentrations and comparison with actual measured concentrations could identify elevated trace elements and affected sites. Such a model set was developed from surface bed sediments collected nationwide in the United States. Tests of the models in a small Louisiana basin indicated that they could be used to establish local trace element background levels, but required recalibration to account for local geochemical conditions outside the range of samples used to generate the nationwide models.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Use of sediment-trace element geochemical models for the identification of local fluvial baseline concentrations |
| ISBN | 0947571086 |
| Issue | 203 |
| Year Published | 1991 |
| Language | English |
| Publisher | Publ by IAHS |
| Publisher location | Wallingford, United Kingdom |
| Larger Work Title | IAHS Publication (International Association of Hydrological Sciences) |
| First page | 339 |
| Last page | 348 |
| Conference Title | 20th General Assembly of the International Union of Geodesy and Geophysics |
| Conference Location | Vienna, Austria |
| Conference Date | 11 August 1991 through 24 August 1991 |
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