architecture
barrier
bridge
building
canal
cascade
channel
city
concrete
construction
dam
engineering
flood
flood gate
floodgate
flow
flowing
gate
gateway
hydro
hydroelectric
hydropower
industry
landmark
landscape
lock
nature
old
outdoor
outdoors
regulate
reservoir
river
sluice
sluice gate
sluicegate
station
stone
stream
structure
technology
travel
view
wall
water
waterfall
watergate
weir