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| Title | Quality and Fate of Fish Hatchery Effluents During the Summer Low Flow Season | |||
| Month-Year Published | January 1989 | |||
| Online Availability |
4607 kilobytes, requires version 4.0 or later of Adobe Acrobat Reader Software get Acrobat Reader
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| Short 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. (Also see abstract below) | |||
| Publication Number | 89-17 | |||
| Author(s) | Kendra, W. | |||
| Print Availability |
Not maintained in stock. Copy must be made from archive version. Request will be referred to the source program.
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| Number of pages | 50 + app (68 total) | |||
| Keywords | ammonia, chemical, chemical oxygen demand, effluent, fish, fish hatchery, flow, invertebrates, nitrogen, outfall, pH, phosphorus, receiving water, recommendations, sediment, study, temperature, waste, water, water quality | |||
| Subject Waterbodies |
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| Related Publications | Title | Relationship | ||
| Quality of Salmonid Hatchery Effluents during a Summer Low-Flow Season. Article in Transactions of the American Fisheries Society 120:43-51, 1991. | similar topic | |||
| Abstract | Long 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. Recommendations include: 1) provide solids sedimentation as a minimum wastewater treatment strategy; 2) revise state pollutant discharge permit requirements; and 3) monitor phosphorus in freshwaters receiving hatchery effluents. |
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