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Quality and Fate of Fish Hatchery Effluents During the Summer Low Flow Season

Publication number Date Published
89-17January 1989
VIEW NOW Quality and Fate of Fish Hatchery Effluents During the Summer Low Flow Season (Number of pages: 68) (Publication Size: 4MB)

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Author(s) Kendra, W.
Description A study if freshwater fish hatcheries was conducted by the Washington State Department of Ecology during the 1988 summer low flow period. Hatchery effluents showed significant increases in temperature, pH, suspended solids (total and volatile), ammonia, organic nitrogen, total phosphorus, and chemical oxygen demand. Wastewater discharge sometimes caused violation of state water quality standards; impacts were exacerbated by poor dilution. Hatchery nutrient loads equaled or exceeded receiving water loads; effects of enrichment were most evident in oligotrophic waters. Benthic macroinvertebrates sensitive to organic waste were often replaced by more tolerant forms in the vicinity of hatchery outfalls.
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Keywords recommendations, receiving water, chemical oxygen demand, invertebrates, nitrogen, flow, temperature, fish, study, water, chemical, water quality, sediment, quality, waste, outfall, pH, phosphorus, fish hatchery, effluent, ammonia
WATERSHED Water Resource Inventory Areas
(WRIA 07,WRIA 08,WRIA 09,WRIA 10,WRIA 13,WRIA 15,WRIA 16,WRIA 22,WRIA 23,WRIA 24,WRIA 26,WRIA 37,WRIA 41,WRIA 52,WRIA 55)

Quality of Salmonid Hatchery Effluents during a Summer Low-Flow Season. Article in Transactions of the American Fisheries Society 120:43-51, 1991.