Page 3 of 3 < 1 2 3
Topic Options
#1492770 - 01/03/2019 17:32 Re: NSW rainfall shortage from May 2018 [Re: Surly Bond]
EddyG Offline
Meteorological Motor Mouth

Registered: 19/12/2008
Posts: 5389
Loc: Port Stephens NSW
Thats pretty scary stuff now Surly, I believe you guys are on level 3 water restrictions?

I know lake Keepit is all but dry, at about half a percent, what are the other dams sitting at?
_________________________
Rainfall
2018 - 1145.9mm
2019 MTD - 24.7mm
2019 YTD - 60.8mm
https://www.instagram.com/eddygroot/

Top
#1492987 - 03/03/2019 16:38 Re: NSW rainfall shortage from May 2018 [Re: Surly Bond]
Surly Bond Offline
Weatherzone Addict

Registered: 23/08/2003
Posts: 2162
Loc: Manilla, near Tamworth NSW
Hi EddyG
On the Namoi, Keepit Dam, which is the main water storage, is at 0%, and the back-up storage at Split Rock Dam is at 3%. On the Namoi tributary, the Peel River, Chaffey Dam (which supplies Tamworth) is at 30%.
Further north, on the Gwydir River, Copeton Dam is at 12%.

Yes, we are on Level 3 water restrictions. That does not affect me at all.
(1.) Although I built my house in the town (1999), I am not connected directly to town water, but use my 30,000 litre tanks for everything. I have 8,000 litres left. (Almost time to worry.)
(2.) My car doesn't get washed more than once per year, and not every year.
(3.) My garden is practically all plants local to the area, and they need no watering, even in drought.
In the district there has been a widespread die-off of silky oak trees (Grevillea robusta). They are native to the Gold Coast, a more soggy area.
_________________________
Data are cheap; information is expensive!

Top
#1493615 - 09/03/2019 14:21 Re: NSW rainfall shortage from May 2018 [Re: Surly Bond]
Surly Bond Offline
Weatherzone Addict

Registered: 23/08/2003
Posts: 2162
Loc: Manilla, near Tamworth NSW
Use of groundwater in drought

The drought has been reported from many points of view by the ABC:
https://www.abc.net.au/news/drought/
One report, posted on 2 March 2019, points out that little is known about reserves of groundwater:
https://www.abc.net.au/news/2019-03-02/spike-in-groundwater-use-in-drought-sparks-warning/10850944.

Water users, particularly irrigators, tend to fall back on increased groundwater use when drought makes surface water scarce. Is it being all used up? It seems that we don't know.

The most recent rainfall status graph for Manilla NSW (posted above on 1 March) shows a 10-year rainfall total of only 5826 mm. Had the rainfall in the last ten years been at the average rate of 652 mm per year, the total would have been 6520 mm. The actual rainfall was 694 mm less than that.
That is, total rainfall in the last 10 years has been only 89% of the 136-year average. Do we have as much groundwater in storage as we once had?

That 10-year total is a severe shortage, such as has occurred in less than 5% of history (1946 and 1920, for example). At this time, there are also serious shortages (below the 10th percentile) at the even longer time scales of 12 years, 15 years and 20 years.

Does it matter? Perhaps we are about to find out.
_________________________
Data are cheap; information is expensive!

Top
#1493647 - 09/03/2019 22:24 Re: NSW rainfall shortage from May 2018 [Re: Surly Bond]
Seira Offline
Meteorological Motor Mouth

Registered: 27/08/2003
Posts: 7697
Loc: Adelaide Hills
Originally Posted By: Surly Bond
One report, posted on 2 March 2019, points out that little is known about reserves of groundwater:
https://www.abc.net.au/news/2019-03-02/spike-in-groundwater-use-in-drought-sparks-warning/10850944.

A quote from the link had a critical point -- how can someone manage, let alone envisage the future of groundwater / surface water supplies without measurements and monitoring?

Top
#1495615 - Today at 11:56 Re: NSW rainfall shortage from May 2018 [Re: Surly Bond]
Inclement Weather Offline
Meteorological Motor Mouth

Registered: 07/03/2006
Posts: 5366
Loc: Diamond Valley
There is some hope on the horizon in looking at a cross-section of the latest runs from the major models. It is showing significant inland troughing after Trevor makes its way inland after crossing the NT coast. It gets picked up by a series of upper troughs and depending on what model you look at, it variously washes out over central Australia, but, significantly some models are having it wash out over the Darling basin. It will be worth keeping an eye on in the coming week.
_________________________
The original donut hole

Top
Page 3 of 3 < 1 2 3


Who's Online
26 registered (Rain Goblin, Markus, Farra, divho, crikey, Aussea, Delta-T, Nature's Fury, Snapper22lb, paj, Mike Hauber, TrentG, S.Novaehollandia, LonnyDave, DNO, Mad Elf #1.5, Breezin, bbowen, RC, Warloq01, retired weather man, 5 invisible), 106 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Today's Birthdays
Dale Small, Michael Bath, Ronfishes
Forum Stats
29893 Members
32 Forums
24117 Topics
1521904 Posts

Max Online: 2985 @ 26/01/2019 12:05
Satellite Image