In August 1979 a glacier outburst from Flood Lake, British Columbia, released 150 × 106 m3 of water. The resulting flood was routed through the Stikine River and yielded a maximum discharge rate of 1200 m3 s−1 at a gauging station 90 km downstream from the glacier dam. We have used a computer model to simulate this outburst in order to test the usefulness of the model as a predictor of flood magnitude. The predicted peak discharge is 2160 m3 s−1 at the outlet tunnel of the ice dam and 1700 m3 s−1 at the gauging station.

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