The location of said station may be changed from year to year as the river channels and water flow conditions of the river may require.
(the river channels and water flow conditions of the river; may require; ) (The location of; said; station may be changed from year to year as the river channels and water flow conditions of the river may require) Context(The location of said,List([0, 20))):(station; may be changed; from year; T:to year)
The location of said,List([0, 20))
the river channels and water flow conditions of the river The location of station
may require said may be changed
station may be changed from year to year as the river channels and water flow conditions of the river may require
from year T:to year