iv
ERDC/CRREL TR-02-14
6
INSTRUMENTATION ................................................................................ 44
Bed profiling ................................................................................................ 44
Ice thickness measurements ......................................................................... 46
Velocity profiling ......................................................................................... 48
Web cameras ................................................................................................ 50
Scour monitors ............................................................................................. 51
7
SURVEY CONDITIONS ............................................................................. 60
Weather ........................................................................................................ 60
Flow .............................................................................................................. 63
8
FINDINGS AT SURVEY SITES ................................................................ 65
Culbertson site, RM 16201622 ................................................................... 65
Tveit-Johnson site, RM 16241626 ............................................................. 77
Vournas site, RM 16311632 ....................................................................... 85
Mattelin site, RM 16451646 ....................................................................... 90
Pipal site, RM 17161717 ............................................................................ 95
Observations on riverbank erosion at the survey sites ............................... 101
9
PERFORMANCE OF RIVERBANK STABILIZATION METHODS ..... 108
Bendway weirs ........................................................................................... 112
Short and tall log groins ............................................................................. 114
Rock-filled log cribs ................................................................................... 116
Hay bale revetments on riprap toe .............................................................. 119
Willow posts ............................................................................................... 121
Discussion .................................................................................................. 121
10 GENERAL OBSERVATIONS .................................................................. 124
Hydraulic influences of river ice ................................................................ 124
Geotechnical influences of river ice ........................................................... 127
Combined impact of hydraulic and geotechnical influences ...................... 128
11 CONCLUSIONS AND FURTHER ISSUES ............................................. 130
River ice influences .................................................................................... 130
Instrumentation performance ..................................................................... 132
Issues for further investigation ................................................................... 133
LITERATURE CITED ..................................................................................... 135
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