Topics
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Electric power-plants
1
Electric utilities
1
Environmental aspects
49
Environmental conditions
1
Estimates
3
Evaluation
2
Finance
1
Fiscal policy
2
Fish surveys
4
Fishery resources
3
Fishes
32
Fishing
3
Fishways
4
Food
3
Food chains (Ecology)
3
Forecasting
1
Fossils
1
Freshwater animals
3
Freshwater habitats
18
Freshwater productivity
3
Geographic information systems
1
Geological cross sections
1
Geology
6
Geomorphology
12
Glacial erosion
1
Glaciers
1
Groundwater
7
Groundwater flow
2
Habitat
11
Habitat (Ecology)
4
Health aspects
4
History
2
Human services
4
Hydroelectric power plants
98
Hydrologic cycle
1
Hydrology
4
Ice on rivers, lakes, etc
2
Instream flow
9
Invasive plants
1
Landscape changes
1
Law and legislation
1
Licenses
5
Light pollution
1
Maps
1
Marine mammals
1
Mathematical models
1
Mercury
6
Mercury content
6
Meteorology
5
Methodology
2
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