aerial
architecture
artificial lady
barrage
barrier
bridge
cascade
construction
countryside
dam
dike
ecology
fencing
flight over
gateways
hydraulic
hydraulic structure
hydro
hydroelectric
hydroelectric dam
hydroelectric power plants
hydropower
hydrotechnical facility
industrial
infrastructure
lake
landmark
landscape
natural
nature
outdoors
reinforced concrete
renewable
reservoir
river
river hydraulic structures
structure
supply
technology
top view
urban
view
wall
water
water intake hydroelectric complex
water level
watercourse
weir