Topics
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Sediment transport
3
Stream invertebrates
3
White whale
3
Aquatic animals
2
Congresses
2
Earthquake effects
2
Groundwater flow
2
History
2
Ice on rivers, lakes, etc
2
Riparian ecology
2
Stream measurements
2
Wildlife research
2
Aerial videography
1
American beaver
1
Analysis
1
Appropriations and expenditures
1
Aquatic habitats
1
Archaeological significance
1
Biological productivity
1
Climatic changes
1
Construction projects
1
Cost effectiveness
1
Cost of operation
1
Costs
1
Data processing
1
Ecology
1
Economic conditions
1
Economics
1
Effect of dams
1
Effect of habitat modification on
1
Effect of hydroelectric power plants on
1
Electric power-plants
1
Electric utilities
1
Environmental conditions
1
Evaluation
1
Fiscal policy
1
Forecasting
1
Fossils
1
Geographic information systems
1
Geological cross sections
1
Glacial erosion
1
Glaciers
1
Habitat (Ecology)
1
Helicopter transportation
1
Human services
1
Hydrologic cycle
1
Landscape changes
1
Light pollution
1
Maps
1
Mathematical models
1
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