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The impact of spring breakup ice on stream channel morphology in northern New England By Jaime Craig.

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Presentation on theme: "The impact of spring breakup ice on stream channel morphology in northern New England By Jaime Craig."— Presentation transcript:

1 The impact of spring breakup ice on stream channel morphology in northern New England By Jaime Craig

2 Distribution of Distribution of historic ice jam events in New England

3 Difficulty in studying ice breakup Hydrometric gauging stations are useless under icy conditions Water height isn’t a good representation of stream activity

4 Significance of river ice formation

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7 Ice jam formation

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9 Effect on sediment erosion Increase in turbidity Discharge during ice breakup is two to five times greater discharge during the open-water period. (Prowse, 1993) Increase to 291 mg/L (at 2,280 m 3 /sec) just before breakup and to a peak of 331 mg/L (2,480 m 3/ sec) during the final ice run. (Milburn and Prowse, 2000) Ice scouring

10 Andrew M. Tuthill, U.S. Army Corps of Engineers Ice scouring

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12 Tunbridge, VT, March 1999

13 Bridge collapse

14 References Beltaos, S. and A. Kääb, 2014: Estimating river discharge during ice breakup from near-simultaneous satellite imagery. Cold Regions Science and Technology, vol. 98, p. 35-46 Marsh, P., L. Lesack and A. Roberts, 1993: The environmental effects of ice jam flooding on lakes in the Mackenzie Delta. NHRI Symposium No. 12, p. 359-381. Marsh, P. and M. Hey, 1989: The flooding hydrology of Mackenzie Delta lakes near Inuvik, NW.T., Canada. Arctic, 42, p. 41-49. Pearce, C.M., 1991: Monitoring white spruce communities on the Mackenzie Delta with satellites. NHRI Symposium No. 4, National Hydrology Research Institute, pg. 107-120. Prowse, T.D., 1995: River ice processes. In Beltaos, S., ed. River ice jams. Highlands Ranch, CO, Water Resources Publications. Prowse, T.D., B.R. Bonsal, C.R. Duguay and M.P. Lacroix, 2007. River-ice break-up/freeze-up: a review of climatic drivers, historial trends and future predictions. Annals of Glaciology, v. 47, p. 443-451.


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