00000nam 2200000za 4500 9.846922 CaOODSP 20241203113640 cr ||||||||||| 171109s1983 onca|||fo f000 0 eng d CaOODSP eng eng fre n-cn-on 1980 1982 En13-5/84-02E-PDF Wong, J. Ice freeze-up and breakup observations in the Upper Grand River [electronic resource] : 1980-81 and 1981-82 observations / by J. Wong and S. Beltaos. [Burlington, Ont.] : Environmental Hydraulics Section, Hydraulics Division, National Water Research Institute, 1983. iii, 24, [28] p. : ill. [NWRI contribution] ; 84-2 Cover title. "May 1983". Series number supplied by publisher. Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "The first two years‘ ice observations on the Upper Grand River are described and interpreted. Flooding was experienced during both the 1980-81 and 1981-82 breakup seasons and was caused by major ice jams..Breakup initiation data for the Marsville and Upper Belwood gauge sites are consistent with earlier findings on other rivers. This was not the case for west Montrose. A possible cause of this discrepancy is the local formation and behaviour of slush jams during freeze up. Potential peak breakup stages, as predicted by the theory of equilibrium floating jams. were not exceeded by any of the four major jams that were documented. This is in agreement with expectation since three of these jams did not attain equilibrium and the fourth appeared to be associated with overestimated flow discharge"--Abstract, p. i. Includes abstracts in French. gccst Hydrology gccst Ice Canada. Environment Canada. National Water Research Institute (Canada) NWRI contribution ; no. 84-2 (CaOODSP)9.844121 PDF 4.54 MB https://publications.gc.ca/collections/collection_2017/eccc/En13-5-84-02-eng.pdf