Author

Aizpurua

Date of Award

8-1981

Degree Name

Master of Arts

Department

Biological Sciences

First Advisor

Dr. Clarence J. Goodnight

Second Advisor

Dr. David C. Mahan

Third Advisor

Dr. Joseph G. Engemann

Access Setting

Masters Thesis-Open Access

Abstract

The present study was undertaken to evaluate the impact from normal precipitation (ra in , snow) into an urbanized lake during 1978- 1980. Several stations were chosen, and various limnological parameters were investigated. Chemical analyses were used to estimate the annual load of nutrients input into the lake by the storm sewer and surface runoff. Excessive phosphorus and nitrogen loads from these sources were discharged into the lake.

Fecal coliform distribution in the lake before, during, and after several storm events was studied. In general, fecal coliform counts increased after storm events. Peak concentrations decreased markedly with distance of the station from the storm sewer outlet. When the storm ended, the fecal coliform cound usually decreased at each station. After a period of approximately 43 hours, the fecal coliform count returned to the levels which occurred before the storm event. In the swimming area the counts of fecal coliform during the testing period were considered to be within safe limits.

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