Leaky weirs in rising floodwaters
In August 2020 we experienced a 1 in 50 year flood at Mulloon Creek.
It was with a degree of trepidation that the Mulloon Rehydration Initiative’s (MRI) Project Coordinator Peter Hazell ventured out after the main flood to see how very recently installed leaky weir structures in the lower Mulloon catchment had fared, considering they had been in for such a short time. Normally, we would like a relatively small rain event first up to help ‘settle’ them in place.
However, the strength of both the design and the build was evident when Peter visited the creek. All had held up well and done their job of slowing the water flow and pushing water and nutrient rich sediment out onto the adjoining floodplain.
Well done to Peter and his team!
From Peter Hazell, MRI Project Coordinator
On 9 August 2020, the big flood came to Mulloon!
Not since 1974 had Mulloon seen such an event. Back then, the power of the flood caused untold erosion, chewed out the banks and changed the course of the creek.
This time however, it was a vastly different story with recent creek works quietening the angry flood. For 36 hours the floodwaters spread across the floodplain filtering the still substantial sediment load from the December 2019 fires and recharging the floodplain aquifer.
All while the very freshly installed leaky weir structures held together as 160 cubic metres of water per second pulsed through the system.
Duralla & Palerang
Home Farm
The Mulloon Rehydration Initiative is jointly funded through the Mulloon Institute and the Australian Government’s National Landcare Program and is supported by various affiliates.