Australian Water Information Dictionary
watercourse
A river, creek or other natural watercourse (whether modified or not) in which water is contained or flows (whether permanently or from time to time); and includes:
(i) a dam or reservoir that collects water flowing in a watercourse;
(ii) a lake or wetland through which water flows;
(iii) a channel into which the water of a watercourse has been diverted;
(iv) part of a watercourse; and
(v) an estuary through which water flows.
This definition applies to: