| Ice Engineering. Method to Evaluate Potential for Ice Impacts on Sediment Stability |
JAN 2005 |
9 pages |
| Authors:
Andrew M. Tuthill; ENGINEER RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND ENGINEERING LAB
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 | Uncertainty surrounding ice and sediment interaction introduces a high-level risk in the design of contaminated sediment remediation measures in rivers. Because much of the historic industrial activity in the United States is concentrated along northern rivers, many contaminated sediment sites are ice- affected. Furthermore, a high level of design uncertainty and risk results from the fact that no adequate analytical or numerical models exist to predict sediment transport under ice ... |
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| Ice and Debris Passage for Innovative Lock Designs |
JAN 2003 |
45 pages |
| Authors:
Andrew M. Tuthill; ENGINEER RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND ENGINEERING LAB
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| Physical and numerical models were used to assess ice and debris passage at navigation locks focusing on key factors such as the configuration of the upper approach, the design of the lock filling and emptying system and the location and design of culvert intakes and outlets. Unconventional ice passage techniques such as manifolds in the miter gates were also evaluated. Physical model results were compared to field observations and a ... |
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| Videomonitoring Performance of the St. Marys River Ice Islands and Ice Boom |
MAY 2002 |
44 pages |
| Authors:
Andrew M. Tuthill; John J. Gagnon; COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
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| In 1997, six islands were constructed to stabilize the ice cover at the entrance to the Little Rapids Cut on the St. Marys River at Sault Ste. Marie, Michigan. It was hoped that the artificial islands would eliminate the need for an ice retention boom installed annually since 1974 by the Corps of Engineers. The U.S. Army Cold Regions Research and Engineering Laboratory (CRREL) videomonitored the performance of the ice ... |
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| Ice-Affected Components of Locks and Dams |
FEB 2002 |
30 pages |
| Authors:
Andrew M. Tuthill; ENGINEER RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND ENGINEERING LAB
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| Ice plagues the operation and maintenance of many U.S. Army Corps of Engineers locks and dams. Because these structures vary greatly in age, geographical setting, and design, their performance in ice also varies. This report describes the ice problems related to specific project components such as the lock approaches, miter gates, lock walls, and dam spillway gates. Post- construction solutions such as high-flow bubblers and heat deicing methods are also ... |
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| Flow Control to Manage River Ice |
JUL 1999 |
32 pages |
| Authors:
Andrew M. Tuthill; COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
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| This report describes flow-control methods for reducing ice problems in rivers. Objectives include reducing ice interference with winter hydroelectric production and navigation, ice jam flood mitigation, as well as ensuring minimum winter flows for fish and water supply. The winter season is divided into three periods. During early winter, the main objective of flow control is to promote the rapid formation of a smooth, stable ice cover. For the midwinter ... |
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| ICETHK User's Manual, Version 1 |
SEP 1998 |
32 pages |
| Authors:
Andrew M. Tuthill; James L. Wuebben; John J. Gagnon; COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
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| This report describes the ICETHK computer model that is used in conjunction with the HEC-2 backwater model to simulate equilibrium ice jam profiles. The ICETHK model fulfills an important need in studies that require the calculation of ice jam affected stage. This report presents the theory and limitations of ICETHK and serves as a user's manual, and concludes with a discussion of river ice modeling ... |
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| Selection of Confluence Sites with Ice Problems for Structural Solutions |
MAR 97 |
28 pages |
| Authors:
Andrew M. Tuthill; Anthony C. Mamone; COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
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| This study examines a broad range of ice problems at river confluence sites, grouping the sites into four categories. Weighted criteria were used to select two representative sites from each category for detailed analysis. This report describes the ice problems at the eight selected sites, focusing on the relationship between channel geometry, hydrometeorological factors, and the historical record of ice events. For each site, tentative structural solutions are proposed. ... |
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| Design of Ice Booms |
APR 96 |
33 pages |
| Authors:
Edward P. Foltyn; Andrew M. Tuthill; COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
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| This technical digest provides basic engineering design guidance for floating ice retention structures or ice booms. Basic types of booms and their ice control objectives are described briefly. The basic theory and equations used in ice boom design are then presented and typical structural components described. The report addresses other design considerations, such as boom - layout, geometry, and anchor systems, as well as the selection of wire rope and ... |
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| Structural Ice Control: Review of Existing Methods |
JUL 95 |
38 pages |
| Authors:
Andrew M. Tuthill; COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
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| This report is a comprehensive review of structural ice control methods in use worldwide today. The structures are grouped according to the purpose of the ice control. Categories are sheet ice retention, breakup ice control and ice diversion. The focus is on the recent performance of the structures. Innovative solutions that could be applied to river confluence ice problems also receive special attention. The report reviews the state of the ... |
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