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ii <br />moderate between River Mile 300 and 316 (+/- 15%). The variation in Froude number between <br />the steady and the fluctuating flows was minimal (+/- 0.05) downstream of River Mile 300 and <br />moderate (+/-0.2) between River Mile 300 and River Mile 316. It can be seen that the influence <br />of fluctuating flows was primarily limited to the reach of river upstream of about River Mile 300. <br />In general, it is expected that the influence of the river fluctuations should decrease in the <br />downstream direction due to the subsidence of flood waves as they propagate in the downstream <br />direction. The subsidence is caused largely by channel friction as the wave propagates, but other <br />factors can also play a role (Henderson, 1966). Given the small effect of the fluctuating flows on <br />the hydraulic properties downstream of River Mile 300, the influence of the fluctuating flows on <br />ice cover thickness and roughness should be minor downstream of this point. <br /> <br /> <br /> <br /> <br /> <br />t <br />1 <br /> <br />1 <br /> <br />i~ <br />1 <br /> <br />17 <br />