Topics
Hydroelectric power plants
Dams
5
Environmental aspects
5
Climate
4
Hydrology
4
Ice mechanics
3
Ice on rivers, lakes, etc
3
Economic aspects
2
Economic conditions
2
Economic history
2
Regional economics
2
Social aspects
2
Social conditions
2
Temperature
2
Air quality
1
Animals
1
Antiquities
1
Archaeological geology
1
Archaeological surveying
1
Design and construction
1
Ecology
1
Environmental conditions
1
Fishes
1
Geological surveys
1
Historic sites
1
Licenses
1
Measurement
1
Paleontological excavations
1
Particles
1