Topics
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Hydrology
2
Ice mechanics
2
Ice on rivers, lakes, etc
2
Indians of North America
1
Instream flow
1
Land use
1
Licenses
2
Mammal populations
1
Mammals
3
Methodology
2
Modification
1
Moose
2
Navigation
1
Nests
2
Overhead electric lines
1
Pacific salmon
2
Paleontological excavations
1
Planning
6
Plant ecology
1
Plants
1
Power utilization
5
Public opinion
2
Railroad tracks
1
Recreational use
2
Research
2
Rivers
3
Roads
1
Social aspects
1
Spawning
1
Stream measurements
5
Streamflow
2
Temperature
2
Thermal pollution of rivers, lakes, etc
2
Transportation
3
Trapping
1
Vegetation management
1
Water quality
3
Water rights
1
Water temperature
4
Water-power
2
Wetlands
1
White-water canoeing
1
Wildlife conservation
1
Wildlife management
1
Zoological surveys
1