Assertion: ditch | /r/HasProperty | maintained
Facets:
value: due to natural geomorphological equilibrium
type: CAUSE
value: largely
type: DEGREE
Source sentences:
text: The roadbed and ditches should be maintained so the work will be well drained at all times while still controlling erosion and sedimentation.
text: Sustainable channel design can result in ditches that are largely self-maintaining due to natural geomorphological equilibrium.