Assertion: marsh's water | /r/CapableOf | flow to contour lines
Facets:
value: downhill perpendicular
type: MANNER
Source sentences:
text: These data are reported in 0.3 m (1 foot) increments with a grid size of 10 m × 10 m. Generally, watershed delineation works on the principle that water flows downhill perpendicular to contour lines.