Midwest (U.S.A.) reservoir water quality modification

✍ Scribed by Victor I. Okereke; E. Robert Baumann; T. Al Austin; Donna Schulze Lutz

• Book ID: 104658314
• Publisher: Springer Netherlands
• Year: 1988
• Tongue: English
• Weight: 666 KB
• Volume: 37
• Category: Article
• ISSN: 0049-6979
• DOI: 10.1007/bf00192945

✦ Synopsis

This paper presents an analysis of the impact of a flood control reservoir on the downstream concentrations and loadings of nitrite plus nitrate N and orthophosphate (soluble nutrients). Fifteen years of weekly sampling data (9 yr before impoundment and 6 yr thereafter) from four sampling stations were analyzed. The results indicate an increase in the annual average concentrations of nitrite plus nitrate N. These increases varied from 4 to 34%. The changes in orthophosphate concentrations were more modest. Annual loading rates of both parameters (kg ha-x yr-1 ) correlated well with runoff (cm yr-1 ). A comparison of the leading rate correlations for all four sampling stations showed that the differences between them are not significant at the 95 % level of confidence. Besides, the reservoir was shown to have had no significant impact on the average annual loading rates of these two soluble parameters at downstream locations.