Poster Number 3
See more from this Division: General Discipline Sessions
See more from this Session: Geochemistry; Geochemistry, Organic (Posters)
Abstract:
Results indicate there is tremendous variability in the major and trace element chemistry of the filtered water samples. For example, on a single sampling date the concentration of major elements at the 10 sites sampled can vary by more than a factor of three (e.g. Ca 60-180 ppm; Mg 10-55 ppm) while trace elements may vary by a factor of 10 (e.g. Mn 0.02-0.2 ppm; Sr 1-12 ppm). Similar variability in chemistry is seen at each site over time (e.g. Ca 65-130; Mg 10-35 ppm; Mn 0.01-0.07 ppm; Sr 0.5-7 ppm at the site closest to the mouth). Unfiltered water samples show similar spatial variability.
There is a strong correlation between some elements in the water samples (e.g. Ca and Mg; Ca and Sr), indicating a similar source. In other cases (e.g. Na vs Ca; Na vs K), there appear to be two separate trends, possibly indicating a source of contamination. There is not a strong correlation between discharge and river chemistry.
See more from this Division: General Discipline Sessions
See more from this Session: Geochemistry; Geochemistry, Organic (Posters)