Cumulative snowmelt runoff distribution graphs and their use in runoff forescasting

TitleCumulative snowmelt runoff distribution graphs and their use in runoff forescasting
Publication TypeConference Proceedings
Year of Conference1951
AuthorsKoelzer, V. A.
Conference Name19th Annual Western Snow Conference
Series TitleProceedings of the 19th Annual Western Snow Conference
Date PublishedApril 1951
PublisherWestern Snow Conference
Conference LocationVictoria, British Columbia
KeywordsReservoir regulation, Runoff, Snowmelt, Water supply forecasting

Procedures for refining total seasonal runoff forecasts as the snowmelt season progresses are presented on the basis of temperature and runoff data. Methods described were developed for operation in the Seminoe Reservoir in the North Platte River Basin, Wyoming. The principle of snowmelt runoff variations with changes in temperature is used to develop mass curves of accumulated values of day-degrees of melting temperatures against accumulated daily inflow to the reservoir. The mass curves have a striking similarity in shape. The possibility of comparing accumulated runoff expressed in percent of total seasonal runoff with accumulative day-degrees of melting temperature are investigated. Cumulative snowmelt runoff distribution graphs are developed. A definite relationship is found to exist between the percent of seasonal snow melt and cumulative temperatures.Discussion by Walter U. Garstka and Milton S. Sachs.