Sweetwater Fishing Forums
General Category => News Views & Press Releases => Topic started by: Editor on August 27, 2012, 01:27:46 AM
-
Lachlan River rises as enviro flows pass through dam
25 August 2012 - State Water Corp
Water users on the Lachlan River downstream of Wyangala Dam, Gooloogong and Jemalong are advised of ongoing rises in river levels due to increased environmental water releases from the dam.
Environmental flows announced last week increased further from Saturday (25 August) as inflows increased due to recent rain. An environmental release of 2300ML per day from Wyangala Dam commenced on Sunday, 19 August.
Environmental releases from Wyangala Dam are triggered by rainfall, as well as inflows into the dam and tributaries below the dam wall. The translucent environmental flow period which commenced on 15 May 2012, will close on 15 November 2012.
The rules in the water sharing plan for the Lachlan River provide for a more natural flow regime within the river system by allowing a portion of dam inflows to pass into the river system for environmental benefit.
Water Delivery Manager, Central valleys, Sri Sritharan again urged water users in the area to monitor their stock and equipment.
This current event commenced on 19 August 2012 at Wyangala Dam. Current predictions are:
Estimated total dam inflow 48,000 ML
Total dam release 43,000 ML
Estimated total tributary inflow 14,000 ML
Estimated peak flow @ Cowra 10,500 ML/day
Estimated peak flow @ Forbes 11,500 ML/day
Estimated peak flow @ Condobolin 8,000 ML/day
Estimated peak flow @ Brewster Weir 7,500 ML/day
This event is expected to last for another 5 days, depending on follow-up rainfall in the catchment.
Storage information in relation to this event is summarised in the following table:
Wyangala Dam Lake Cargelligo Lake Brewster
Start event 97.9% 112% 92%
Finish event 98% 112% 92%
Image: Wyangla Dam outlet valves