Author(s): C. D. Smith
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Keywords: No Keywords
Abstract: Subsequent to the completion of shellmouth Dam on the Assiniboine River, looding problems were experienced upstream at Kamsack, Saskatchewan. Local esidents naturally suspected the cause of flooding was the backwater from the am. A detailed analysis indicated there was no backwater effect, but rather he increase in stage was caused by changed channel conditions following several arge floods. silt and debris from the flood plain had been deposited in the hannel, reducing the conveyance capaci ty. These observations were the basis for studying the mechanics of flood plain low on a physical hydraulic model. The model verified the prototype behavior egarding stage increase. In addition, the model indicated that for simulated arge floods, the contribution of the meandering channel to the total discharge apacity wasnegative. This result also pointed out a common error in. ssumptions often made by users of computer programs for water surface profile: valuation when applied to meandering channels.
Year: 1989