Water Stewardship Information Sources
| Citation | McLean, D, Mannerstrom, M and Lyle, T. 2007. Revised design flood profile for Lower Fraser River. Presentation at: 18th Canadian Hydrotechnical Conference, Winnipeg, MB, 22-24 August 2007. |
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| URL | http://www.ebbwater.ca/wp/wp-content/uploads/2013/06/McLeanMannerstromLyle2007.pdf |
| Abstract/Description or Keywords | The Lower Fraser River has undergone significant change since the major floods of 1894 and 1948. Over 250 km of dikes have been constructed, side-channels and sloughs have been blocked off, river training structures have been installed to narrow and deepen the channel and the lower 40 km reach has been dredged to improve navigation. Most flood control works were designed on the basis of studies carried out in 1969, which relied mainly on historic high water marks and staff gauge rating curve extensions. An updated design flood profile was produced based on detailed surveys of the river channel and floodplain collected in 2005. A MIKE11 hydrodynamic model was calibrated to known recorded floods and then used to calculate water levels that would result from a re-occurrence of the 1894 flood of record, estimated to have had a flow of 17,000 m3 /s at Hope. Results of the modelling show there is a serious flood threat along the lower 120 km reach, with the potential for several dikes to be overtopped. |
| Information Type | article |
| Regional Watershed | Lower Fraser |
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| Project status | complete |
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