With Victoria’s wet and wild weather of the last few days, I was keen to see how our local creeks responded to about 35 mm of rain overnight. It’s a far cry from the 150-250 mm some catchments in South Gippsland received yesterday, but given the damage that floodwaters can cause, in this case, less is definitely better!

The 35 mm yesterday came on top of a similar amount over the last week, so the catchment was already nice a wet, but far from saturated. And the 35 mm of rain falling across the Seven Creeks catchment upstream of Pollys equates to about 5425 ML.

So, how does an inch and a half of rain impact stream-flow? Well, in the upper parts of the Seven Creeks catchment, in the tributary streams, you could be forgiven for thinking there’d been much rain at all. Though some of these streams had a strong flow, it wasn’t out of the ordinary, given it’s winter. The only tributary that was obviously flowing much more strongly than ‘normal’ was Spring Creek in Strathbogie.

Just click on an image to view in a gallery.

Flows in the tributaries didn’t appear significant and there wasn’t any significant flooding. But once these tribs and the multitude of smaller channels and paddock-runoff all join up in the main stream, the Seven Creeks begins to flow very swiftly and at full capacity. These pics are in order from upstream to downstream.

Of course, everything comes together at Pollys. This will be a good refreshing flow for the entire Seven Creeks system, all the way to the Goulbourn River, 100 km downstream.

And it’s always exhilarating to see the catchment wet like this – the noise, the power in the water. But also because it’s a sign that ground water is being replenished – these area good recharge events too.

A Wetland Wonderland

Strathbogie groundwater update – January 2020

Groundwater – where does it come from, where does it go?

Strathbogie groundwater update – June 2019