Laboratory and field experiments with snow gages in Idaho

TitleLaboratory and field experiments with snow gages in Idaho
Publication TypeConference Proceedings
Year of Conference1951
AuthorsWarnick, C. C.
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
KeywordsSnow gage test results, Snow storm simulation, Wind tunnel

A large slow-speed wind tunnel was constructed to study air movement around precipitation gages. The tunnel is made of plywood in sections which can be dismantled. Sawdust was used to illustrate air patterns and make quantitative evaluations of the catching characteristics of the gage. A Speed Graphic camera is mounted 25 inches above the floor of the tunnel in a small darkroom. The laboratory tests are centered around air flow phenomena near half-scale models of the gages and the catching characteristics of various gages equipped with different shields. Field studies, in progress for 3 winters, are in a plot containing 7 gages. Gage measurements are taken at weekly intervals by stick measurements. The tests in the tunnel indicate that the Alter Shield has the optimum basic shape. Field studies show a fault in the standpipe gages. The stored precipitation in the standpipe gage freezes and makes records questionable. (See also WSC 220-49: SIP U1807)