梯形断面排水沟
channel with trapezoidal section
生物砖排水沟
drainage ditch built with biological bricks
排水沟
drainer
drainage ditch
weep drain
drain ditch
gutter waterway
gutter way
discharge ditch
trench drain
Draining ditch
weeper drain；weep drain；drainage ditch；drain ditch
dike
gutter
barrel-drain
Drain
gullet
Leader
catch-drain
Drainage
drainage system
drainage channel
escape canals or drainage pipes
outfall ditch
gutterway
infiltration ditch
catchment area
Channel
Water