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Ice and Permafrost
12
Snow
12
*ICE FORMATION
11
ICE
9
RIVERS
7
Civil Engineering
5
DAMAGE
4
FLOODING
4
Hydrology
4
Limnology and Potamology
4
*FLOOD CONTROL
3
*WATER FLOW
3
BRIDGES
3
HYDRAULICS
3
VELOCITY
3
WINTER
3
*FLOODING
2
*HYDRAULICS
2
*ICE JAM
2
*ICE JAMS
2
*JAMMING
2
*PERMEABILITY
2
*RIVERS
2
ACCUMULATION
2
ARMY CORPS OF ENGINEERS
2
BASINS(GEOGRAPHIC)
2
BOREHOLES
2
CONDUCTIVITY
2
CONTROL
2
CONTROL SYSTEMS
2
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