deep, wide
shallow, small
open
The drainage system consisted of a few open ditches to facilitate run-off.

muddy
drainage, irrigation
roadside

dig

run
The ditch ran parallel to the road.

surround sth
The lettuce beds are surrounded by a deep ditch.

in a ditch, into a ditch
I tripped and fell into a muddy ditch.

Ditch is used with these nouns as the object:
school