Rain and storm for Cpt

Draganchor

Senior Member
Joined
Oct 20, 2012
Messages
693
#1
https://www.windguru.cz/91

at last, some winter weather. If there are some meteorologist out there how much will this help our dams?

I for one will be avoiding any surf mid week, well beyond my capabilities. :crying:
Looks like quite a blow in, again, any experts that can help idiots like me understand better?

thanks
 

saturnz

Honorary Master
Joined
May 3, 2005
Messages
11,492
#2
https://www.windguru.cz/91

at last, some winter weather. If there are some meteorologist out there how much will this help our dams?

I for one will be avoiding any surf mid week, well beyond my capabilities. :crying:
Looks like quite a blow in, again, any experts that can help idiots like me understand better?

thanks
theres a guy that releases regular "independent" updates on the dams, apparently we have sufficient water to last until about August, with no rain
 

Agent_Smith

Honorary Master
Joined
Dec 3, 2010
Messages
10,476
#3
https://www.windguru.cz/91

at last, some winter weather. If there are some meteorologist out there how much will this help our dams?

I for one will be avoiding any surf mid week, well beyond my capabilities. :crying:
Looks like quite a blow in, again, any experts that can help idiots like me understand better?

thanks
Tough to say. Depends where it rains. If it chucks it down in the catchment areas, then that's awesome and will definitely help (saw that they're expecting 80mm - 100mm in some areas. ). Rains out to sea or over the suburbs? Well apart from peoples' pools filling and gardens getting a good soaking, it won't make much difference.
 

Draganchor

Senior Member
Joined
Oct 20, 2012
Messages
693
#4
Fair enough, I use Windguru mostly for surf predictions. (so I know which day to take off)

What other meteorological sites are there that are accurate? I have to say that when Windguru says the SE will start pumping @ 14h30, they are pretty accurate.

would love to have a few more legitimate resources at hand

thanks

Draganchor
 

Sneeky

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Joined
May 5, 2004
Messages
10,860
#5
As with all of them use as many as you can to get a picture.
As a surfer you know this already :)
Used windguru as well for ages

Windytv also has been good for monitoring systems far off the coast, where swell is generated, but they also have a rain prediction model.
As eluded to in the other drought thread there is a system on the 7th or so that may have some meaningful rain, time will tell but it still looks like it wont make a dent. A squall or 2 before that and another just after.

Anyway, this will be a good gauge to see how good it is.

https://www.windy.com/?rain,-34.107,23.708,6,m:cItagG6

click and hit the play button bottom left.
You can also click on a specific point on the map (dam area) to get some rainfall prediction for that area.
Swell/wind/etc options on the right, although the swell ones seem iffy.
 
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Draganchor

Senior Member
Joined
Oct 20, 2012
Messages
693
#7
Awesome links guys,
Thanks for taking the time to let me know about them.
Bookmarked and I will deffo be using them.

:)

Edit:

Farking loving that windy, quite a nifty tool
 
Last edited:

Icemanbrfc

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Jul 28, 2011
Messages
12,619
#11
Can i ask a question..

Why dont the City find ways to catch water from any rainfall, and then transport that water to the Dams. Whenever it has rained, i always sat looking out and thinking, this water is just going to waste down the drains etc.
 

saturnz

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Joined
May 3, 2005
Messages
11,492
#12
Can i ask a question..

Why dont the City find ways to catch water from any rainfall, and then transport that water to the Dams. Whenever it has rained, i always sat looking out and thinking, this water is just going to waste down the drains etc.
its only a problem now, once the drought is gone nobody will care
 

Icemanbrfc

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Jul 28, 2011
Messages
12,619
#13
its only a problem now, once the drought is gone nobody will care
For sure, but it's just something I wondered. Why not have of those containers scattered around certain places in the City, and when it does rain, whatever water we can get, transport to the Dams. Only thing I can think of is that not enough rainfall, but there are so many other things the City could have done to try and fill the dams.
 

Cius

Expert Member
Joined
Jan 20, 2009
Messages
4,137
#14
Can i ask a question..

Why dont the City find ways to catch water from any rainfall, and then transport that water to the Dams. Whenever it has rained, i always sat looking out and thinking, this water is just going to waste down the drains etc.
Mostly because it is expensive and difficult to do so. The best way to catch water is to dam a river that has a good cachment area. Dams are extremely expensive to build.

For instance if the city wanted to catch some water that hits the city itself it would need to build a small dam somewhere before the river it all flows into gets salty and pump that water uphill to a bigger dam. It would be very expensive to do that for I am not sure how much water savings.

Still, it is clear that both JHB and Cape Town are reaching the limit of their water system with recent growth in these areas. They will need to start expanding the water infrastructure somehow or what we have experienced in the past 12 months will become more regular.
 

Necropolis

Executive Member
Joined
Feb 26, 2007
Messages
8,405
#15
Can i ask a question..

Why dont the City find ways to catch water from any rainfall, and then transport that water to the Dams. Whenever it has rained, i always sat looking out and thinking, this water is just going to waste down the drains etc.
You realise how much water would have to be "caught" and transported to make an appreciable impact on the levels of the dams?
 

Gaz{M}

Expert Member
Joined
Feb 9, 2005
Messages
3,435
#19
Dams are designed to fill from rivers that have catchment areas. This drought is unprecedented, but not unpredicatable. Basically, once CT knew they had a problem (2 years ago) it was too late to do anything about it. Any long term solutions will take 3 to 5 years to materialise. You could get a situation like we had in Gauteng, where we had dams at 26% and then after two weeks of amazing torrential rains, the dams were over 100% full and now we have 2 years supply of water. Any emergency water projects would have been a waste of money.

It's a tricky thing to act on, because you could spend billions on new water sources that you won't even need if the rains suddenly return. That said, CT water supply has not kept up with the water needs of the province. New dams and schemes are needed more urgently than previously planned.
 
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