Victoria's platypus reproduction season runs from August to March. (Stock Photo) (Sharon Wormleaton)
The weekend storms may have disappointed some Melburnians, but when it comes to their effect on the Yarra River there is good and bad news.
The Victorian capital escaped the worst of the state's "rain event", which hit hardest in the Northeast.
Yarra Riverkeeper Andrew Kelly said that the minor downpour meant that the Yarra baby's platyrers appeared safe and sound. 1
First, the good news
In Victoria, the platypus mate between August and October, after which the pregnant females build deep and complex burrows or renew the burrow of another woman from the previous year.
It is in these specially built burrows where mothers lay their eggs and nurse their young.
Before the storms, Mr. Kelly was concerned that the burrows along the main river in Melbourne would be flooded, drowning the babies.
"The burrows are in the bank, above the waterline" he said
"The platypus can only be under water for a few minutes at best.
" The risk was that the burrows They would flood, but I'm sure that did not happen because there was no extreme increase in the water level. "
The previous Melbourne floods had taken their toll on the Yarra platypus population.
" After the 2011 floods there were not as many juveniles for next year or so, "Kelly said.  Now the bad news
The public has been warned to sail in kayak or paddle in the waterways of Melbourne. (ABC Radio Melbourne: Simon Leo Brown)
Kelly said that while some up and down the river were natural, what was unnatural was the sudden runoff that reached the river from the parking lots, roads and waterways. roads.  "The river is really muddy at the moment," he said, adding that turbidity was bad for the ecology of the river because "the more turbid the river, the less light it gets to the bottom."
Mr. Kelly said while the river sand the traps had done a good job of picking up the trash dragged by the storm, there were some contaminants that the traps could not catch.
"Stormwater exerts great pressure on the sewer system," he said.
"Water will be filtered, the sewers will be filled and the water will be filtered again under pressure".
He said that there were still illegal sewer systems along the Yarra River that discharged effluents.
Further up the river there were also many properties with septic tanks that may have flooded and leaked into the river.
It's not just the Yarra; The Victoria Government website lists all of the beaches in Port Phillip Bay as of poor quality waters that are not suitable for swimming at this time.
An EPA alert advised the public to avoid contact with water in Melbourne's waterways, including the Yarra, until further notice.
"Do not put your hands on it, do not go paddling," Kelly said.
"It is sprayed a lot, you get water in the paddle, you run a high risk of getting infected."
"The last time I was paddling after a storm I got sick"
Hopefully the water is a bit more clean when the platypus emerge from their burrows within a few months.  The brown water swirls around a water level marker that says 2.3 meters. "title =" Yarra River after storms, December 2017 "width = "700" height = "467" />
The Yarra is cloudy and polluted after weekend floods. (Andrew Kelly)