CGRG Bibliography of Canadian Geomorphology
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Author : Chubak, N.J.J.; and McGinn, R.A.
Date : 2002.
Title : Evaluating outlet flow for Clear Lake, Riding Mountain National Park, Manitoba: A rating curve based on lake levels.
Publication : Annual Meeting of the Canadian Association of Geographers. Toronto, Ontario. May 27-28, 2002.
Issue :
Page(s) :
Abstract
The stage-discharge relationship or "Rating Curve" represents the integrated effect of stream geometry and hydraulic parameters and is of fundamental importance in hydrologic studies in that they convert records of water level to flow rates. At many hydrometric sites the primary assumptions of stream regime (equilibrium or grade) and uniform flow require several years of measurement for validation. In 1993 record high water levels in Clear Lake, Manitoba spilled over the outlet berm and eroded an entry channel into Clear Creek. The outlet channel has undergone significant geometric adjustment during the first three years of operation. This observation is supported by periodic hydrometric measurements (1994-1996) indicating significant variation in both channel geometry and stream flow. Attempts at developing a rating curve for Clear Creek in 1995 encountered problems associated with the measurement of channel stage. Specifically, beaver dam flooding and backwater curve effects. This paper employs recorded lake levels, channel staff gauged stage measurements and discharge measurements to develop rating curves for the outlet of Clear Lake.
Bibliography of Canadian Geomorphology