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Many watersheds in the central interior of British Columbia are designated for rehabilitation under the Watershed Restoration Program, which includes measures to control surface erosion. A study of suspended sediment and fish habitat sedimentation in several watersheds of the central interior, precursory to restoration activity, is described in this report. Suspended sediment concentrations measured during the spring snowmelt period indicated that sediment delivery to the nine streams surveyed was highly variable. Concentration profiles in some streams were indicative of chronic sources of sediment, but profiles in other streams were indicative of episodic sources of sediment. Severity-of-ill-effect values determined from the suspended sediment data were sufficiently high to indicate lethal and paralethal effects on the resident and migratory fish populations present in streams during the study period. Particularly severe impacts were predicted for eggs and developing larvae. High flow conditions in the spring...
Larkin, G.A., Slaney, P.A.; Warburton, P.; Wilson, A.S.. 1998. Suspended Sediment and Fish Habitat Sedimentation in Central Interior Watersheds of British Columbia. Ministry of Environment, Lands and Parks; Ministry of Forests. Watershed Restoration Management Report. WRMR07
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