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Report: Theodosia River - Summer Flow Distribution Assessment (Technical Memorandum)

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The BC Conservation Foundation (BCCF) with support from National Resources Canada is investigating the health of the Theodosia River summer run Chum Salmon population and their river spawning habitat. As part of the study, Kerr Wood Leidal Associates Ltd. (KWL) has been retained to complete a summer flow distribution assessment of the lower Theodosia River below the Olsen Lake diversion.

Author:  Craig Sutherland; Kerr Wood Leidal. Prepared for BC Conservation Foundation

Date Published:  Dec 2011

Report ID:  33832

Audience:  Government and Public

The BC Conservation Foundation (BCCF) with support from National Resources Canada is investigating the health of the Theodosia River summer run Chum Salmon population and their river spawning habitat. As part of the study, Kerr Wood Leidal Associates Ltd. (KWL) has been retained to complete a summer flow distribution assessment of the lower Theodosia River below the Olsen Lake diversion. The assessment will be paired with results of a spawning habitat suitability study conducted in the lower Theodosia River by BCCF and Sliammon First Nation staff and used to estimate habitat impacts as a result of the diversion. The scope of the study included: 1. Project initiation meeting and background data collection; 2. Delineation of upper, middle, and lower watersheds of the Theodosia River; 3. Estimation of August, September, and October discharge frequency curves with and without the diversion using data collected by the Water Survey of Canada (WSC) for the period from 2004 to 2009 except 2007; 4. Prepare comparison of monthly hydrographs of estimated discharges at the mouth of Theodosia River with and without Olsen Lake diversion; and 5. Prepare brief technical memorandum including map and figures. This project was co-funded by Living Rivers-Georgia Basin/Vancouver Island (2006-11), a program of the BC Living Rivers Trust Fund, and Natural Resources Canada's Regional Adaptation Collaborative in British Columbia.

Report Type
  Fish and Aquatic Habitat Information
 
Subject
  Fish and Fish Habitat - Channel Assessment
  Fish and Fish Habitat - Habitat and Stream Assessment
  Fish Species - Chum Salmon - Oncorhynchus keta
  Fish Species - Salmon (General) - Oncorhynchus spp.
  Region - Lower Mainland
  Watershed Groups - 900 - West Coast Rivers (South of Cape Caution)
  Water Information - Channel Morphology
  Water Information - Channel Surveys
  Water Information - Hydrometric / Hydrology
  Water Information - Watershed Assessment Studies
 


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