Results 211 to 220 of about 662,691 (262)
Some of the next articles are maybe not open access.
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
openaire +1 more source
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
openaire +1 more source
1994
Abstract : Ice jam data collection is necessary to gain information on ice jam events, which may occur rarely and are often short-lived, but can at the same time cause large damages. An ice jam data collection program involves field data collection, review of existing hydrologic, hydraulic, meteorological, and ice records, and a search of historical ...
Jon E. Zufelt, Kathleen D. White
openaire +1 more source
Abstract : Ice jam data collection is necessary to gain information on ice jam events, which may occur rarely and are often short-lived, but can at the same time cause large damages. An ice jam data collection program involves field data collection, review of existing hydrologic, hydraulic, meteorological, and ice records, and a search of historical ...
Jon E. Zufelt, Kathleen D. White
openaire +1 more source
Shokotsu River ice jam formation
Cold Regions Science and Technology, 2003A spring ice jam occurred in the Shokotsu River in March 1995. This has been the only known ice jam in this river since 1955. This paper discusses the ice jam processes and investigates the causes of the Shokotsu River ice jam by analyzing the available hydrometeorological data as well as hydraulic and geometric characteristics of the river.
Hung Tao Shen, Lianwu Liu
openaire +1 more source
Predicting Ice Jams With Neural Networks
21st International Conference on Offshore Mechanics and Arctic Engineering, Volume 3, 2002One 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 +3 more
openaire +1 more source
Ice-Cover Breakup and Ice Jamming
2019During 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.
openaire +1 more source
Equilibrium Thickness of Ice Jams
Journal of the Hydraulics Division, 1977By 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.
openaire +1 more source
Hydraulic resistance of river ice jams
Journal of Hydrodynamics, 2018The hydraulic resistance of river ice jams consists of the resistance due to the seepage flow through the jam and the resistance due to the shear stress on the undersurface of the jam. Existing empirical formulations attributed the entire jam resistance to the undersurface resistance of the jam, but relate the jam resistance to jam thickness with ...
Lin Fan, Ze-yu Mao, Hung Tao Shen
openaire +1 more source
Theoretical Model of River Ice Jams
Journal of the Hydraulics Division, 1976A mathematical analysis is developed to describe the evolution and characteristics of river ice jams. The principal components of the analytical model are the static force equilibrium of the fragmented ice cover; the unsteady continuity equations for the frozen and liquid water; the nonuniform unsteady momentum relation for the flow; and relations in ...
Mehmet S. Uzuner, John F. Kennedy
openaire +1 more source
Hindsight on River Ice Jam Stability
Journal of Cold Regions Engineering, 1996Following 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.
openaire +1 more source
Initiation of ice jams — a laboratory study
Canadian Journal of Civil Engineering, 1978Ice jam initiation by a simple partial surface obstruction in a channel was studied experimentally in laboratory flumes using polyethylene, paraffin, as well as real ice parallelepipeds, as model ice floes. The important dependent parameter under study was the critical surface concentration of floes at the gap in the surface obstruction at which floes
Jean-Claude Tatinclaux, Chu-Liang Lee
openaire +1 more source