00000nam 2200000zi 4500 9.956902 CaOODSP 20251031091458 m o d f cr bn||||||||| 251030s1964 oncdb ob f000 0 eng d CaOODSP eng rda CaOODSP n-cn-nt En57-56/517-1964E-PDF Thompson, H. A., author. Critical durations of snowmelt periods in the Liard and Hay River floods / by H.A. Thompson and U. Sporns. [Toronto, Ontario] : Department of Transport, Meteorological Branch, 1964. 1 online resource (17 pages, 7 unnumbered pages) : maps, charts. text txt rdacontent computer c rdamedia online resource cr rdacarrier TEC ; 517 Digitized edition from print [produced by Environment and Climate Change Canada]. "29 Apr. 64." "CIR 4030." Includes bibliographical references (page 9). "The greatest flood-levels ever recorded at Fort Simpson, NWT occurred in April 1963 during the spring break-up of the Liard River. At approximately the same time the town of Hay River was inundated by flood-waters of the Hay River. In this paper an attempt is made to determine the flood producing meteorological factors. Due to the absence of streamflow and snow course data in these basins it was necessary to limit the investigation to the observed climatological parameters. It is shown by an analysis of snow-depth on ground observations that the rate of depletion of the snow-pack for durations of 20-25 days following the start of the spring thaw is a critical factor in producing floods on these rivers. Very moist antecedent conditions also contributed to the 1963 floods"--Abstract. Snow Northwest Territories Hay River. Floods Liard River. Neige Territoires du Nord-Ouest Hay River. Inondations Liard, Rivière au. Hay River (N.W.T.) Climate. Liard River Climate. Hay River (T.N.-O.) Climat. Liard, Rivière au Climat. Canada. Meteorological Branch, issuing body. TEC ; 517. (CaOODSP)9.934253 PDF 956 KB https://publications.gc.ca/collections/collection_2025/eccc/en57/En57-56-517-1964-eng.pdf U.D.C. 551.579.2