architecture
barrier
building
canal
cascade
concrete
conservation
construction
dam
day
drop
energy
engineering
flood
flow
flowing
gate
gorges
history
hydro
hydroelectric
hydropower
industry
lock
obsolete
old
outdoors
overflow
past
power
regulate
reservoir
river
sluice
small
station
stone
stream
structure
surface
technology
wall
water
waterfall
watergate
weir