英文關鍵字
water
flow
video
flowing
walls
drains
wall
small
river
drainage
channel
stream
liquid
movement
nature
urban
environment
runoff
narrow
concrete
erosion
infrastructure
system
management
continuous
dynamic
cityscape
wet
outlet
pipe
trickling
spillway
discharge
fluid
clean
steady
landscape
hydrology
solution
planning
waterway
engineering
control
conservation
maintenance