Estimation of Winter Streamflow Using a Conceptual Hydrological Model: A
improve on the techniques used by Water Survey of Canada technologists to produce winter streamflow estimates. The general approach is to use a combination of conceptual and statistical models to estimate discharge based on available data. Studies of winter streamflow variability are often hampered...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.496.4947 http://cripe.civil.ualberta.ca/Downloads/11th_Workshop/Hamilton-et-al-2001.pdf |
| Summary: | improve on the techniques used by Water Survey of Canada technologists to produce winter streamflow estimates. The general approach is to use a combination of conceptual and statistical models to estimate discharge based on available data. Studies of winter streamflow variability are often hampered by a lack of reliable discharge data during periods of ice-cover. However, Department of Indian and Northern Affairs technologists have made frequent winter discharge measurements from 1997 to the present at the Wolf Creek hydrometric station near Whitehorse, Yukon. In this study, these measurements are used to test the application of a conceptual hydrological model for the purpose of estimating winter streamflow. Model performance is also compared against estimates generated by skilled hydrometric technologists using standard Water Survey of Canada techniques. Winter discharge variability was more dynamic than predicted by either the conceptual model or by the technologists. Regression analysis of the model residuals against 5-day antecedent temperature is not significant (R2 = 0.02, p = 0.275). Regression analysis of model residuals against 5-day antecedent precipitation shows a weak positive trend (R2 = 0.07, p = 0.047). In-stream data (e.g. stage, channel slope or specific conductance data) are likely required to further resolve the variance between model output and observed discharge. 1 |
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