00000nam 2200000za 4500 9.846925 CaOODSP 20241203113640 cr ||||||||||| 171109s1986 onca|||fo f000 0 eng d CaOODSP eng eng fre n-cn-on 1982 1983 En13-5/85-12E-PDF Wong, J. Ice freeze-up and breakup observations in the Upper Grand River [electronic resource] : 1982-83 observations / by J. Wong and S. Beltaos. Rev. [Burlington, Ont.] : Environmental Hydraulics Section, Hydraulics Division, National Water Research Institute, 1986. iii, 23, [35] p. : ill. NWRI contribution ; 85-12 Cover title. "May 1985, Revised September 1986". Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "The third year's ice observations on the Upper Grand River are described and interpreted. The winter was mild, and a "mature" breakup was observed. Breakup initiation data for the Marsville gauge site are consistent with earlier findings on other rivers. However, this is not the case for the other two gauges, Upper Belwood and west Montrose. A possible cause of this discrepancy is the different manner of ice breakup and removal at these locations. Data from the freeze up process at Upper Belwood and west Montrose are analyzed and compared with the theory of equilibrium floating ice jams. The results are consistent with earlier findings on breakup jams but more data are needed before conclusions can be made"--Abstract, p. i. Includes abstracts in French. gccst Hydrology gccst Ice Canada. Environment Canada. National Water Research Institute (Canada) NWRI contribution ; no. 85-12 (CaOODSP)9.844121 PDF 3.96 MB https://publications.gc.ca/collections/collection_2017/eccc/En13-5-85-12-eng.pdf