agitated
artificial
canal
channel
closed
collection
conduit
control
current
curved
dam
dike
direct
duct
dyke
embankment
filter
filtered
flow
gathering
geometric
geometry
glacier
gully
harvesting
lake
levee
linearity
lines
melt
mountains
narrow
pinzolo
power
pump
restless
restrict
riot
stock
tumultuous
turmoil
water
watercourse
weir