Trends in Streamwater Chemistry and Input-Output Balances, Fraser Experimental Forest, Colorado

摘要

Precipitation chemistry on the Fraser Experimental Forest is some of the least altered in Colorado. Colume weighted mean pH is 5.32 (4.8 microeq/l, nitrate concentration is 9.7 microeq/l and sulfate 16.6 microeq/l). Calcium and sulfate are the dominant ionic inputs; calcium and bicarbonate are the dominant stream outputs. Calcium and sulfate show a significant (p less than 0.01, Kendall's tau) increase in stream concentration (unweighted) from 1965 to 1984.