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Fisheries investigations in the Salmon River (Langley) in the summers of 1979 and 1980 provided an opportunity to quantitatively assess effects of a December 1979 flood event on stream morphology, substrates, juvenile salmonid rearing habitat and fish populations (primarily salmonids). Significant (paired sample t-test, a 0.05) changes in stream morphology occurred only in channel width and glide area, both of which increased from 1979 to 1980. No significant change was documented in wetted width, percent wetted width, pool area, riffle area, pool depth, riffle depth and glide depth. No significant changes occurred in percent substrate composition between years for all sites investigated. Some individual sites showed a decrease in fines. Based on juvenile salmonid cover, the rearing capacity of the Salmon River increased by 20% from 1979 to 1980. Cutbanks, instream log debris and over-stream vegetation cover were the prime contributors to this increase. No significant fish density difference over all sample s
de Leeuw, A.D.. 1981. Effects of a Winter Flood Event on Juvenile Salmonid Populations and Associated Rearing Habitat in Salmon River (Langley). Ministry of Environment. Fisheries Report. FRN150
Topic: Fish and Fish Habitats
Keywords: Salmon River, flood, stream morphology, salmonid, habitat, rearing capacity, fish density, coho salmon, cutthroat trout, rainbow trout, fry
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