Forecasting Powell Lake runoff

TitleForecasting Powell Lake runoff
Publication TypeConference Proceedings
Year of Conference1956
AuthorsChard, A. E.
Conference Name24th Annual Western Snow Conference
Series TitleProceedings of the 24th Annual Western Snow Conference
Date PublishedApril 1956
PublisherWestern Snow Conference
Conference LocationPenticton, British Columbia

The method for forecasting runoff in this British Columbia watershed (580 sq. Mi.; to 7000 feet elevation) is described. The source of data forecasting were snow surveys, precipitation records at the townsite of Powell River, and long-range weather forecasts. An empirical runoff formula was developed from snow survey -precipitation data and curves were constructed showing the net runoff to be expected form the snow water content at the snow courses. The contribution of snowmelt was found to be 1/3 of the total runoff. A sample calculation of expected runoff for 1956 is presented.