storm

drain

water

rain

flow

flowing

rush

drainage

pipe

tunnel

entrance

roar

sewer

surface

dry

well

municipal

rainfall

heavy

flooding

gutter

gravity

sewage

underground

inlet

piping

outlet

bypass

gully

ditch

channel

urban

runoff

drip

splash

spring

fountain

brook

river

creek

gushing

patter

splat

trickle

drainpipe

conduit

trench

system

aqueduct

watercourse

gush