Every week the choices for navigating the river are constantly changing as its receding levels of flow uncover new formations.
(the choices for navigating the river; are constantly changing; T:as its receding levels of flow uncover new formations; T:Every week) (its receding levels of flow; uncover; new formations)
the choices for navigating the river its receding levels of flow
are constantly changing uncover
T:as its receding levels of flow uncover new formations T:Every week
new formations