Results 161 to 170 of about 37,295 (205)

Equilibrium Thickness of Ice Jams

Journal of the Hydraulics Division, 1977
By equating the kinetic energy of ice floes carried by a stream to the potential energy they acquire when submerged, a relationship was derived between the mean velocity of the approach flow and the average thickness of the stable ice jam formed only by accumulation and transport of floes.
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Limit equilibrium of ice jams

Cold Regions Science and Technology, 1992
Abstract The concept of a unique condition for the stability of ice jams in rivers at breakup, which may occur at a specific site for a given water discharge, was first proposed from theoretical considerations. With similar considerations, it was also shown that the stability also depends on the thickness of ice jams but that under certain conditions
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Predicting Ice Jams With Neural Networks

21st International Conference on Offshore Mechanics and Arctic Engineering, Volume 3, 2002
One of the most difficult problems facing hydraulicians is the development of a method that predicts the formation of breakup ice jams. Because of the suddenness with which breakup jams and related flooding occur, prediction methods are desirable to provide early warning and allow rapid, effective ice jam mitigation.
Darrell D. Massie, Kathleen D. White, Steven F. Daly, Regan McDonald   +3 more
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Ice-Cover Breakup and Ice Jamming

2019
During the ice-cover period, initial ice-cover breakup precedes ice-jam flood events. Hence, it is important that breakup processes are well understood in order to be better prepared for ice-jam flood forecasting. Being able to predict ice-cover breakup provides an indication when ice-jam flood forecasting should commence.
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Ice-jam flood delineation: Challenges and research needs

Canadian Water Resources Journal / Revue canadienne des ressources hydriques, 2017
Identifying and understanding flood hazard and risk is the requisite first step in enhancing public safety, emergency response planning and future flood damage reduction. The delineation and mapping of flood hazard, inundation and risk areas is an effective way to communicate these vulnerabilities.
Kovachis, N., Burrell, B. C., Huokuna, Mikko, Beltaos, S., Turcotte, B., Jasek, M.   +6 more
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Hindsight on River Ice Jam Stability

Journal of Cold Regions Engineering, 1996
Following a brief account of the development of ice jam stability theories since the 1960s, inconsistencies in their interpretation for practical applications are identified. In particular, the widely used “bell-shaped curve” is often applied under conditions that do not satisfy the assumptions made in order to derive it.
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Probable Maximum Ice-Jam Flood

2019
In this chapter, the stochastic modelling framework introduced in the previous chapter is extended to calculate the probable maximum backwater-level elevations PMFice that can be attained from ice jams. The PMFice represents a threshold water level below which ice jams can still remain intact for a certain period of time but above which the jam becomes
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Modeling ice jam release waves with consideration for ice effects

Cold Regions Science and Technology, 2006
The sudden release of a river ice jam can produce a dramatic ice run and rapidly rising water levels, resulting in a significant threat to human safety and property. Therefore, it is highly desirable to have reliable forecasting models for these events.
Y. She, F. Hicks
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Calculation of maximum ice jam levels

Hydrotechnical Construction, 1972
To successfully counter ice jams, it is necessary to make accurate predictions of the maximum ice jam levels and the length of the ice jam.
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Celerities of waves and ice runs from ice jam releases

Cold Regions Science and Technology, 2016
Abstract The release of a river ice jam can lead to rapidly rising water levels and a fast-moving torrent of water and ice that can threaten riverside communities. Two phases are released when an ice jam fails: a water wave and a moving ice accumulation (called an “ice run”).
Jennifer Nafziger, Yuntong She, Faye Hicks   +2 more
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