Managing flows for ephemeral streams 2008-02-18T04:35:36Z 2009-10-12T02:20:40Z Managing flows for ephemeral streams Land and Water Australia Land and Water Australia Ephemeral streams are watercourses that do not have surface water flow for the entire year. they are also called: seasonal streams, intermittent streams, episodic streams or temporary streams. This fact sheet provides a brief summary of the importance of ephemeral streams and the need to ensure ephemeral streams receive careful management, even during times of drought. While there is a common perception that biota within ephemeral streams are drought hardy, a large number or species require refuge in rock pools and water holes in order to recognise streams during flow events. PN20579 PN20579 yes