cascade
dam
drop
electricity
energy
environment
falling
flood
flow
flowing
flowing water
foam
force
generation
hydro
hydroelectric
industry
lake
liquid
mist
motion
moving down
open
outdoor
pouring
power
powerful
pressure
rain
reflection
released
reservoir
river
roaring
rush
sluice
spillway
splash
splattered
spray
stream
strong
water
waterfall
wet