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NSW/ACT Widespread Rain - August 7-10, 2020

Discussion in 'Daily & Chat' started by Steve777, Aug 6, 2020.

  1. connells

    connells Addicted

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    Should I have longer showers to help drain out Warragamba Dam?

    Maybe leave the tap running while we brush our teeth?

    Will that help?
     
  2. AshestoAshes

    AshestoAshes One of Us

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    Reverse Waterfalls at Royal National Park
     
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  3. Donzah

    Donzah Pool Room Ski Pass: Gold

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  4. davidg

    davidg Part of the Furniture Ski Pass: Gold

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    This is the river height without that erroneous 1000m spike. Still on its way up but probably reach its peak in the next few hours you would assume

     
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  5. PeterM

    PeterM Hard Yards

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    Water NSW closing several dams to general public.
     
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  6. AshestoAshes

    AshestoAshes One of Us

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    Prayers have been answered we were really staring down the barrel in January, 1 or 2 events could take us to most Sydney Catchment area storages spilling. NE NSW storages will see a significant boost soon enough as well with the upcoming event, along with a strong spring rainy season on the cards for them.

    On the note of heaps of rain, mozzies are out and about. How are they out in August?
     
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  7. warrie

    warrie One of Us

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    Where did you get the graph - Water NSW, cos I can't get it? It has risen a metre in the last 12 hours. Surely it will spill ,but the authorities wait till its at almost FSL then dump a whole lot out at once an exacerbate any flooding. Nepean Dam is 0.7 m over and the flow has nearly hit Penrith.Still no warnings from BoM. There should be a pre release via the long forgotten 50 MW power station which will discharge 64 cumecs. Wait, that's just a blip compared to Jooriland which is at 130 GL /day or 1500 cumecs!!!
    Should spill tomorrow early pm
     
  8. warrie

    warrie One of Us

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    The usual nappy society response.
     
  9. POW_hungry

    POW_hungry Old n' Crusty Moderator Ski Pass: Gold

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  10. davidg

    davidg Part of the Furniture Ski Pass: Gold

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    I was bored this afternoon so went and took the data off the BOM website and plotted it myself in Excel (with the 1000m data point removed of course)
     
  11. Flowin

    Flowin One of Us Ski Pass: Gold

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    Risky stuff in that proposition. Gambling with water supply and legal responsibilities water supply vs flood vs power supply contracts and regulatory obligations. Tough decisions, anybody game to play?
     
  12. nfip

    nfip Cold n' Rusty Ski Pass: Gold

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    Not so suprisingly ....
     
  13. Flowin

    Flowin One of Us Ski Pass: Gold

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    Yep. Some catchments extraordinary above forecast, and others just ordinary. Not easy for authorities to judge where gets impacted based on forecasts. Also difficult for those where the impacts occur based on actual rainfall.
     
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  14. nfip

    nfip Cold n' Rusty Ski Pass: Gold

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    my obs also a LOT of flotsam from bushfires getting transported so damage magnified above and beyond hydraulic pressures.
     
  15. AshestoAshes

    AshestoAshes One of Us

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    Any reports of landslides, would be surprising if the escarpment held up.
     
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  16. nfip

    nfip Cold n' Rusty Ski Pass: Gold

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    South Coast struggling big time after the fires.
    to say the very least.
    Not much holding the ground together as we all can appreciate.
     
  17. Flowin

    Flowin One of Us Ski Pass: Gold

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    Yeah I agree. Sequences of extremes, even if not extreme but at least opposite like fire/flood, or drought/flood can be worse than single events either side of dry/wet.
     
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  18. Flowin

    Flowin One of Us Ski Pass: Gold

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    Water has a lot of influence on landslides. I am aware of many examples of slips in wet weather, not many in dry weather except earthquakes.
     
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  19. stormy3

    stormy3 Addicted

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    Location:
    Ellalong.10kms sw of Cessnock Hunter Valley nsw.
    I ended up measuring 37 mms out of the event here at Ellalong, sw of Cessnock,most fell this morning out of very heavy rain periods from the se.The ground was already soggy from the last event so just 37 mms run all the creeks around here and put a small flood in the near by Ellalong lagoon again,There looks like another possible rain event and maybe ECL next week.
     
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  20. Donzah

    Donzah Pool Room Ski Pass: Gold

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    168 in my nylex
    Emptied once.
     
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  21. Rainbow Spirit

    Rainbow Spirit Addicted

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    Gee, that makes my event total of 52mm small potatoes...
     
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  22. warrie

    warrie One of Us

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    We may partly recall the Wivenhoe spill/flood fiasco in 2011 and the blame game that was played.
     
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  23. warrie

    warrie One of Us

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    Probably closed to the public.
     
  24. Snow Blowey

    Snow Blowey Old n' Crusty Ski Pass: Gold

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    Warragamba a bit different to Wivenhoe as its water storage only (not flood mitigation) and i'm pretty sure it has to spill at 100%. Wivenhoe and plenty others have flood mitigation capacity inbuilt and can reach well over 100% when used
     
  25. warrie

    warrie One of Us

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    Well that call was a bit premature. Still plenty of inflow though and of course the weeks events are no longer published by Water NSW thanks to some bureaucrat. All we have is the June report as the latest info. Graph below for perusal.
    [​IMG]
     
    #225 warrie, Aug 11, 2020
    Last edited: Aug 11, 2020
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  26. warrie

    warrie One of Us

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    Just looked at Wivenhoe and built to take 225%. Hawkesbury just getting a mild flush - only up 1.5 m at Castlereagh but the system is primed if we get ECL #4 along the south coast.
     
  27. Snow Blowey

    Snow Blowey Old n' Crusty Ski Pass: Gold

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    Good to see some others getting som e love. First decent inflow to Wyangla for ages. Its jumped about 20% from this one. Burrendong up into the 30's now. Its all primed. One more 50mm event could be all that is needed for the catchmentsto suddenly spill their guts and fill some dams properly.
     
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  28. Steve777

    Steve777 One of Us

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    Here’s the total rainfall over NSW for the week ended 9:00 today. This will have been almost entirely owing to this event:

    [​IMG]

    While the focus was on the South Coast and hinterland, the whole State (plus parts of Qld, SA and Victoria) got something. About half of NSW got falls of 25 mm or more, with 50 mm plus over much of the South East of the State and the ACT.
     
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  29. Snow Blowey

    Snow Blowey Old n' Crusty Ski Pass: Gold

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    and more to come in the next 2 weeks.
     
  30. AshestoAshes

    AshestoAshes One of Us

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    Wow Warragamba at 95.8%, might inch up a bit in the coming days given the gradient. Nepean Dam has reached the offical 100%. Kind of funny that we're at Level 1 water restrictions, but long term will have to be more water saving from me because we'll see a price rise if the dam drops below 60% again.

    Good video from the SES, it will flood again it's a matter of when. Plus add all the development that we've got there since 1990.
     
  31. Fozzie Bear

    Fozzie Bear One of Us Ski Pass: Gold

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    Begs the question, which idiots allowed development all over the flood plains? Oh wait...........
     
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  32. nfip

    nfip Cold n' Rusty Ski Pass: Gold

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  33. Fozzie Bear

    Fozzie Bear One of Us Ski Pass: Gold

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    That is a metric fukktonne of water :eek:
     
  34. nfip

    nfip Cold n' Rusty Ski Pass: Gold

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    soo is that a Gigafukk ?
    or is that dreaming of the good olde daze !
     
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  35. Fozzie Bear

    Fozzie Bear One of Us Ski Pass: Gold

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    @nfip more than a few Sydharbs (1 Sydharb = 500 gigalitres)
     
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  36. Longys

    Longys Hard Yards

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    Yes it is not for the purpose of flood mitigation, but the sneaky buggers are doing minor releases whilst still maintaining level 1 water restrictions.
     
  37. warrie

    warrie One of Us

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  38. warrie

    warrie One of Us

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    Graph Fri 6 pm. [​IMG]
     
  39. warrie

    warrie One of Us

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    Graph has updated and now at 6 pm Sun is 0.003 m over FSL - that's rather precise.
     
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