Qld cyclone

[Sean K]

Albo didn't want a destructive force named after him?

So, political interference in the BOM? Who would have thought?

 

[qldfrog]

Not sure if further flooding can be discounted. It might turn around and come back too.

Any conspiracy theories on how TC Anthony changed into TC Affred?

Indeed : northern Brisbane area friends saw the worst last night, but now not exactly a cyclone

 

[basilio]

please don't link me with bas

Totally agree Dona..

 

[basilio]

The wind damage from Alfred is receding. The possibility/probability of extensive flooding has increased substantially as the tropical low slows and drops intense rain for the next couple of days.

Check out the brief video clip. The ongoing Guardian blog also highlights the expected volume/intensity of rainfall as the low settles on SE Queensland.

Flood-hit northern NSW told to 'remain vigilant' with more rain on the way

Communities across NSW are warned flooding rains are still possible across the state despite ex-Tropical Cyclone Alfred continuing to weaken.

www.abc.net.au

Cyclone Alfred live updates: Flash-flooding in Brisbane; 243,000 without NBN and 170 Telstra mobile sites offline across south-east Queensland and northern NSW

BoM path track map shows ex-cyclone off Australia’s coast made landfall in south-east Queensland overnight, north of Brisbane. Follow the latest updates today

www.theguardian.com

 

[Smurf1976]

So, political interference in the BOM? Who would have thought?

To be fair I do think the naming of cyclones should avoid getting involved in politics or other issues.

So don't give them the same name as a political leader no matter which side they're from.

 

[SirRumpole]

To be fair I do think the naming of cyclones should avoid getting involved in politics or other issues.

So don't give them the same name as a political leader no matter which side they're from.

Why give them names anyway? Start with Alpha, Beta, Delta, Gamma.....Omega, then start again.

 

[Smurf1976]

how do you release water from a spillway?

Depends on design but generically:

Uncontrolled spillway = the water simply goes down it when it reaches the spillway level, there's no ability to control that whatsoever. An extremely common approach in dam design indeed it's the preferred one wherever there's no reason to avoid it simply because it can't fail, it has no moving parts.

Intake = there's an intake structure on the upstream side of the dam wall with a valve, releasing water via a short tunnel.

Gates = top section of the spill way consists of gates or a rotating drum such that the effective top of the dam wall is lowered in order to release water. One reason for this approach is it enables high capacity discharge without meaningfully raising the lake level. Versus an uncontrolled spillway that, since it relies on the water level being above it, requires the lake level to rise significantly above FSL (Full Supply Level) in order to discharge significant volumes. The greater the flood, the higher the lake needs to rise in order to discharge it.

An uncontrolled spillway will result in a more gradual increase in discharge and a more gradual decrease, generally with a lower peak than would a controlled approach. The involuntary rise of the lake level providing a buffer which smooths out the discharge rate.

Which is best? Absolutely case specific. Depends on the extent to which a rise in the lake level can be tolerated without causing some other problem and also depends on the need (if any) to manage the rate of discharge.

Now where it gets more complex is if the spillway discharges somewhere other than the valley across which the dam wall is built. Examples do exist, Arthurs Lake in Tasmania is one, and is simply a case of having built the dam up to the height where water would spill out somewhere else, then put the spillway at that second location. Typically that approach is used only where spill is expected to be uncommon and wherever that water's going being relatively inconsequential.

Then there are combined approaches. For example the Crotty Dam in Tasmania has an uncontrolled spillway down the face of the rockfill dam (a world first design when built by the way) but also has a discharge valve in the tunnel a short distance downstream of the dam wall which provides additional spill capacity if operated.

Another complexity is when the upstream water can be diverted and spilled somewhere other than the dam or reservoir created by it. Or even more extreme, the flow reversed - excess water flows back out of the reservoir, reversing the direction of the diversion, and is spilled somewhere else. Examples of that do exist albeit not overly common.

As a last resort more modern (past few decades) dams are commonly designed with provision to blow (with explosives) the diversion tunnel plug and release water that way. That's a last resort if all else fails, and will completely drain the reservoir, but it'll do so in a gradual manner thus limiting the extent of flooding downstream to "problem" rather than "outright catastrophic". It's not intended that they're ever used, but they do exist in many dams.

I can't confirm anything for Qld but done properly this is all a number crunching exercise, it's not subjective in any way.

 

[Dona Ferentes]

To be fair I do think the naming of cyclones should avoid getting involved in politics or other issues.

So don't give them the same name as a political leader no matter which side they're from.

especially with an election due !

 

[qldfrog]

So you see Sean, they are proactive now.. For the current updated story:

Flood releases commenced from North Pine Dam – 3:00am on Sunday 9 March 2025 | Seqwater

Seqwater’s Flood Operations Centre mobilised at 9:00am on Wednesday 5 March 2025 due to rainfall forecasts associated with Tropical Cyclone Alfred.

www.seqwater.com.au

 

[qldfrog]

Fwiw, internet up down here in the last hour both NBN and 4g/mobile so i will log out and connect again tomorrow if i can

 

[basilio]

To be fair I do think the naming of cyclones should avoid getting involved in politics or other issues.

So don't give them the same name as a political leader no matter which side they're from.

Which is exactly what they did and why they did it.

 

[qldfrog]

Relentless rain since 4pm yesterday, and storms galore last night, still going on at 4,:30 in the hinterland.
Flooding around from GC to sunny coast and Bundaberg.
We missed the cyclone..can not complain . but not its tail.
Cattle on higher ground, too dark to see yet if my prep work was successful.
Anyone on qld coast from Bundaberg to GZ: stay safe
With news like that, insurance stocks will be surging: the worst it gets, the higher they go

 

[SirRumpole]

Relentless rain since 4pm yesterday, and storms galore last night, still going on at 4,:30 in the hinterland.
Flooding around from GC to sunny coast and Bundaberg.
We missed the cyclone..can not complain . but not its tail.
Cattle on higher ground, too dark to see yet if my prep work was successful.
Anyone on qld coast from Bundaberg to GZ: stay safe
With news like that, insurance stocks will be surging: the worst it gets, the higher they go

That's a bit counter intuitive, surely the more they have to pay out the less their profits and the lower their share price?

 

[qldfrog]

That's a bit counter intuitive, surely the more they have to pay out the less their profits and the lower their share price?

Look at qbe last week.i track them as i shorted them ..a mistake
It should be even dorse as reinsurer
Australian market is always very very slow to change trend..i got an idea why but do not want to offend
And being a fact of life, you need to take this into account.
It is a plus for trend following systems...

 

[IFocus]

Sister Northern NSW coast was without power for 3 days nephew had a genset at his place so no big drama both high ground but would have been hard for those without power and still without brother-in-law said they had the strongest winds Friday night brought down trees blew their fence over hope all continue to remain safe and away from ongoing flooding

 

[Dona Ferentes]

Sister Northern NSW coast was without power for 3 days nephew had a genset at his place so no big drama both high ground but would have been hard for those without power and still without brother-in-law said they had the strongest winds Friday night brought down trees blew their fence over hope all continue to remain safe and away from ongoing flooding

brother at Murwillumbah, on high ground. checks the Tweed Shire council flood cameras .. he's a driver for a bakery and can't get on the road.
Baked beans and tinned tuna. At least the power's on.

 

[qldfrog]

brother at Murwillumbah, on high ground. checks the Tweed Shire council flood cameras .. he's a driver for a bakery and can't get on the road.
Baked beans and tinned tuna. At least the power's on.

What about you @Dona Ferentes , you mentioned power outage and rain?
Actually still bucketing here on sunny coast, big storms last night and we get them rolling on, Nambour cut off this morning as is the range access.
This is not good as these clouds are heading South thru Brisbane, GC and ultimately northern Rivers

 

[qldfrog]

Heading south....

 

[qldfrog]

That's a bit counter intuitive, surely the more they have to pay out the less their profits and the lower their share price?

Was i wrong cf insurance stocks..surging yet sunshine coast flooding started last night today, as well as more in North brisbane..that i know off
So situation on the ground worse today than yesterday, or even Saturday night and not over..
When the boards will release figures, every one will be surprised and then will be time to buy imho
She'll be right is culturally alive in Australia, whatever the facts...

 

[qldfrog]

Interesting maybe for some as side effect
We are fully off grid and today at 3pm, reaching only 47% battery charge, lowest ever

Fully in the cloud, charging at 400w/h and for the first time since moving here, i will start the diesel generator
Do not want an auto start at 1am
Will be good anyway to run the generator a bit..