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Physical and Chemical Conditions in Long Pond, St. John's, Newfoundland: A Pond Receiving Both Rural and Urban Runoff

1976; Wiley; Volume: 61; Issue: 1 Linguagem: Inglês

10.1002/iroh.19760610105

0020-9309

C. W. Andrews, Michael O’Connell,

Aquatic Invertebrate Ecology and Behavior

Abstract The physico‐chemical environment was studied from June 1971 to May 1973 at five stations in Long Pond, St. John's, Newfoundland. This pond receives both rural and urban runoff and is characterized by a high flushing rate. Of the parameters studied, concentrations of total suspended matter, biochemical oxygen demand (BOD), total CO 2 , and free CO 2 were significantly greater in a small pool prior to the main body of the pond near the entry of Learys Brook. Current speed is noticeably reduced at this point. No significant differences were found between stations with respect to pH, dissolved O 2 , total dissolved solids (TDS), total hardness, Ca hardness, Mg hardness, alkalinity, ammonium‐N, nitrite‐N, nitrate‐N, orthophosphate and polyphosphate. Water quality in Long Pond is compared with unpolluted lakes and streams in the area; nutrient levels are indicative of eutrophic conditions.