Rocks on the outflow end of the trench will prevent additional erosion as the water flows from the trench.
(Rocks on the outflow end of the trench; will prevent; additional erosion; T:as the water flows from the trench) (the water; flows; from the trench)
Rocks on the outflow end of the trench the water
will prevent flows
additional erosion T:as the water flows from the trench
from the trench