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NASQAN: The design and implementation of a large-river suspended sediment and trace element flux programme

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Abstract

In 1996 the US Geological Survey (USGS) began a national flux-based water quality monitoring programme in the Mississippi, Columbia, Colorado, and Rio Grande basins. Suspended sediment flux estimates for periods greater than a year are generally accurate within ??15%. Discharge and suspended sediment concentrations varied much more than chemical levels. Most trace element concentrations are not elevated except Zn and Hg in the Ohio River, and Ag, Cu, Pb, Zn, Cd, Cr, Co, Ba, Mo, Sb, Hg, and Fe in the upper Columbia River, which is impacted by mining waste. The majority (???70%) of Cu, Zn, Cr, Ni, Ba, P, As, Fe, Mn, and Al are transported by suspended sediment; Sr transported seems dominated by the dissolved phase, whereas the transport of Li and TOC seem to be divided equally between both phases.In 1996 the US Geological Survey (USGS) began a national flux-based water quality monitoring programme in the Mississippi, Columbia, Colorado, and Rio Grande basins. Suspended sediment flux estimates for periods greater than a year are generally accurate within ??15%. Discharge and suspended sediment concentrations varied much more than chemical levels. Most trace element concentrations are not elevated except Zn and Hg in the Ohio River, and Ag, Cu, Pb, Zn, Cd, Cr, Co, Ba, Mo, Sb, Hg, and Fe in the upper Columbia River, which is impacted by mining waste. The majority (???70%) of Cu, Zn, Cr, Ni, Ba, P, As, Fe, Mn, and Al are transported by suspended sediment; Sr transported seems dominated by the dissolved phase, whereas the transport of Li and TOC seem to be divided equally between both phases.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
NASQAN: The design and implementation of a large-river suspended sediment and trace element flux programme
Issue:
263
Year Published:
2000
Language:
English
Publisher:
IAHS
Publisher location:
Houston, TX, United States
Larger Work Title:
IAHS-AISH Publication
First page:
3
Last page:
18
Number of Pages:
16
Conference Title:
Symposium on the Role of Erosion and Sediment Transport in Nutrient and Contaminant Transfer
Conference Location:
Waterloo, Ont, Can
Conference Date:
10 July 2000 through 14 July 2000