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Swiss AP Forums God Offline Posts: 670 Warrandyte-upon-Yarra Gender:	Snowy release vs flood Mar 8^th, 2012 at 9:03am Hey guys, Got these photos emailed to me the other day. Same section of river from Jack's lookout. And to think the release was one of the biggest in Australian history and supposed to mimic the effects of a flood... Credit where it's due: photos by R. Gibbs
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Ben AP Forums Senior Member Offline unleash your monkey Posts: 321 Sydney, Australia Gender:	Re: Snowy release vs flood Reply #1 - Mar 8^th, 2012 at 2:36pm Holy crap!
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drifta AP Forums God Offline Liquid K-os Posts: 544 SE melb Gender:	Re: Snowy release vs flood Reply #2 - Mar 8^th, 2012 at 3:07pm we should have gone big wave hunting
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mustard AP Forums God Offline Nourish the Mouse! Posts: 619 Melbourne Gender:	Re: Snowy release vs flood Reply #3 - Mar 8^th, 2012 at 5:52pm I do like big waves....
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Rolo AP Forums Full Member Offline I love YaBB 1 Gold! Posts: 176 Sydney Gender:	Re: Snowy release vs flood Reply #4 - Mar 8^th, 2012 at 7:11pm ^^agreed... what were we thinking...
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smiffy AP Forums Junior Member Offline I love YaBB 1 Gold! Posts: 60 hobart Gender:	Re: Snowy release vs flood Reply #5 - Mar 8^th, 2012 at 10:35pm Ok now I want to see a picture of Snowy falls at this level, probably Snowy hardly a bumb, still like to see it though.
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AdrenalineJunkie AP Forums Full Member Offline Live thoughtfully Posts: 152 Frankston Gender:	Re: Snowy release vs flood Reply #6 - Mar 18^th, 2012 at 10:23am wow...!
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MarkW2 AP Forums Newbie Offline Posts: 23 Victoria Gender:	Re: Snowy release vs flood Reply #7 - Mar 18^th, 2012 at 4:43pm Hey mate, was wondering if u knew when these photos were taken? Is the 1st one a hydro "flood" release? Or just Normal flows? Cheers
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Swiss

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Re: Snowy release vs flood
Reply #8 - Mar 18^th, 2012 at 6:34pm

The first one is an environmental release to simulate flood conditions and purge the river of its sediment overload, apparently.
While we're on the topic of the Snowy, we did it last weekend at 3.5m @ McKillops and I'd highly recommend it: big waves, no rocks. Only two rapids, Washing Machine and Gentle Annie, needed closer inspection to avoid some meaty holes. Otherwise all good and only took a day.
Get on it.

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akpv AP Forums Full Member Offline I Love AP Forums! Posts: 162 Gender:	Re: Snowy release vs flood Reply #9 - Mar 19^th, 2012 at 12:18am Almost got to 400 cumecs.
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Swiss

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Re: Snowy release vs flood
Reply #10 - Mar 19^th, 2012 at 9:21am

Very interesting graph. According to that, the peak flood was 'only' about 2.5 times bigger than the peak release. It looks like a much bigger difference in the 2 photos.
The peak of the release was October 12 but the photo of the relase was taken on October 18. Not sure how long it takes for the water to get from Jindabyne (point of release) to the Barry way (photo), but 6 days seems like a lot. Distance is about 150kms, which would mean an average speed of only 1km/hr over 6 days. That sounds a bit slow to me.
So it is possible that the photo of the release was at a slightly lower level than at its peak (the peak had already passed that spot).

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uwhnick

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Re: Snowy release vs flood
Reply #11 - Mar 19^th, 2012 at 5:11pm

That flow comparison graph shows the levels at Dalgety, which is something like 100km upstream of where the photo was taken, so there are a bunch more tributaries which would contribute flow. I'd say the second photo could double that flow, given how widespread the rainfall was, so maybe the total flow is 70,000 ML/day.

The water takes about 2 days to get down to that part of the snowy from Jindabyne, so the first photo is probably 6000 or 7000 ML/day, so it could be that there is 10 times as much water in the second photo as compared to the first (still seems like a low multiple though).

The flow at Dalgety is all spill from Jindabyne Dam, which apparently has never happened until this recent rain. One thing is for sure, Snowy Hydro are laughing their arses off, all the way to the bank with all the government money they were paid for the water they let out last October.

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