Cape dams - not good

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Re: Cape dams - not good

Unread post by snoopy » Sat Dec 28, 2019 9:59 am

You're clearly not paying attention to the facts. :lol:

The saving efforts are noble -its not the long term answer. If you increase demand artificially and add no additional bulk water storage or additional supply, you can have monsoon rain and make no difference in the supply capacity - and then you are screwed long term anyway. Man made disaster.

People must stop focusing on surface dam capacity as indicator and rather ask what is the main bulk supply capacity of ALL sources to CPT. If no other bulk sources were added since the last dam was built - the local government brought this on themselves and put the survival and prosperity of the existing population at risk due to their greed for $$$ - guaranteed higher property tax income AND higher tariffs for water and electricity services. :idea:
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Re: Cape dams - not good

Unread post by Jack Welles » Sat Dec 28, 2019 11:35 am

And if one deliberately picks the two of the very lowest rainfall months of the year (generally pathetic amounts) and then claims that the drought is broken because the two recent months had more than those generally pathetic amounts it adds up to a seriously fallacious argument.

Also the lead times for any sphere of government to set up procurement lines is generally very long (read years) but because of most Capetonians working together, the lean times were very adequately survived and the access to aquifers and desalination plants are now well in hand. Thus even if the drought situation became ever more dire, CoCT is well placed to survive without too much fuss (except possibly by the naysayers, who are, of course, always with us) although probably at a higher cost to the users.
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Re: Cape dams - not good

Unread post by snoopy » Sun Dec 29, 2019 8:33 am

I'm afraid the stats dont support your argument regarding the rainfall. Its rained a lot more than usual - the issue is the demand on water in 2019 is much higher than 2009, BECAUSE of the CTs stimulation of urban creep and no parallel investment in adding more bulk supply capacity at the same time (except the little effort made during crisis management) . So what used to be sufficient bulk supply - became insufficient. Like a run-away train. Which happens if your main focus is making profits to sustain greed, and using water security for that purpose. (ZAR/Kl of water)

The only "positive" thing that came from all of this is the higher income (ZAR/Kl) for the City municipality which refuses to drop water tariffs, despite the higher water levels in bulk supply sources and the higher than usual rainfall. :idea:

And I suppose what they (CT and DWS) fear the most is their inability to cope with what they have created; should the water consumer pull the plug on CT punitive water usage initiative, which only has negative incentive for paying consumers.

Like ESKOM, CT pleads lower income as a result of the punitive measures they chose to impose on consumers - but still expect X amount per annum for supplying less water, as if they were still supplying the service at normal capacity. (Now there is less output, and lowered water pressure = lower operational cost of filtration etc).
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Re: Cape dams - not good

Unread post by V5 - LEO » Fri Oct 09, 2020 8:35 pm

....and this year??
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Re: Cape dams - not good

Unread post by Iceberg » Sat Oct 10, 2020 6:03 am

V5 - LEO wrote:
Fri Oct 09, 2020 8:35 pm
....and this year??
Dams are 100.8% full - 6 dams serving Cape Town 8)
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Re: Cape dams - not good

Unread post by danie.e » Sat Oct 10, 2020 6:46 am

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Re: Cape dams - not good

Unread post by Chalkie » Sat Oct 10, 2020 8:28 pm

Iceberg wrote:
Sat Oct 10, 2020 6:03 am
Dams are 100.8% full - 6 dams serving Cape Town 8)
Well you could blame that on Global Warming. :wink:
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Re: Cape dams - not good

Unread post by Iceberg » Sun Oct 11, 2020 10:01 am

Chalkie wrote:
Sat Oct 10, 2020 8:28 pm
Iceberg wrote:
Sat Oct 10, 2020 6:03 am
Dams are 100.8% full - 6 dams serving Cape Town 8)
Well you could blame that on Global Warming. :wink:
Probably. Hopefully it will fill our dams up North this summer as well...
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Re: Cape dams - not good

Unread post by vanjast » Sun Oct 11, 2020 10:55 am

Chalkie wrote:
Sat Oct 10, 2020 8:28 pm
Iceberg wrote:
Sat Oct 10, 2020 6:03 am
Dams are 100.8% full - 6 dams serving Cape Town 8)
Well you could blame that on Global Warming. :wink:
Ahhh Yes!.. that old chestnut ;)
Forgot about it completely.
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Re: Cape dams - not good

Unread post by V5 - LEO » Sun Oct 11, 2020 11:05 am

.....mother nature operates in cycles - like earthly women - we are entering a "wet" cycle for the southern hemisphere and a "sloshy wet" cycle around the eqautor. And it just in time for a lot of cattle farmers around here :shock:
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Re: Cape dams - not good

Unread post by rare bird » Sat Oct 17, 2020 9:08 pm

V5 - LEO wrote:
Sun Oct 11, 2020 11:05 am
.....mother nature operates in cycles - like earthly women - we are entering a "wet" cycle for the southern hemisphere and a "sloshy wet" cycle around the eqautor. And it just in time for a lot of cattle farmers around here :shock:
agreed . and the cycle follows the sun's cycle.
it always has been wet & sloshy around the equator - certainly every time I have been in equatorial regions! (and icy around the poles!).
reminds me of the time we were interviewing prospective new pilots for a job, and the one ouke coming from one of those equatorial countries had a log book with very few IFR hours. When we probed a bit deeper, his whole house of cards came tumbling down! (pretty much all of his paperwork was fudged / fraudulent!)

back on topic, the lower Berg River Dam was planned 20 years ago already, but due to lack of political will, has never been taken forward.

there is actually a lot of water around the Cape (other than sea water)
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Re: Cape dams - not good

Unread post by Chalkie » Sun Oct 18, 2020 2:02 pm

rare bird wrote:
Sat Oct 17, 2020 9:08 pm
back on topic, the lower Berg River Dam was planned 20 years ago already, but due to lack of political will, has never been taken forward.

there is actually a lot of water around the Cape (other than sea water)
Hence my :wink: The mass migration of voters from rural areas to the urban areas in the early 90's, without a commensurate increase in supply of services. This has lead to a massive increase in water usage. No wonder the dams ran dry.
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Re: Cape dams - not good

Unread post by rare bird » Sun Oct 18, 2020 2:18 pm

Chalkie wrote:
Sun Oct 18, 2020 2:02 pm
rare bird wrote:
Sat Oct 17, 2020 9:08 pm
back on topic, the lower Berg River Dam was planned 20 years ago already, but due to lack of political will, has never been taken forward.

there is actually a lot of water around the Cape (other than sea water)
Hence my :wink: The mass migration of voters from rural areas to the urban areas in the early 90's, without a commensurate increase in supply of services. This has lead to a massive increase in water usage. No wonder the dams ran dry.
yes, and apart from the influx of migrants (not only from Transkei - also many from Zim and DRC) the loss of habitat & changes to irrigated farmland (summer crop in a winter rainfall region - i.e. vineyards) has continued.
Irrigation accounts for half of the water used (actually more than half in the summer months!)
it is also interesting to see who the big users are - at one time the dry dock was one of the biggest water users in Cape Town (because the valves were broken and Transnet didn't repair them - quite bizarre - to have 6 de-watering pumps running full-ball and not stemming the flow!)(that is fresh water - for water jetting. the seawater also leaks in, but that is another story)
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Re: Cape dams - not good

Unread post by rare bird » Sun Oct 18, 2020 2:22 pm

talking of seawater seeping in, reminded me of the 14 boreholes on Robben Island - abstracting way more water than the re-charge rate of the aquifer, to the point where seawater had ingressed and turned the boreholes into producing sand-filtered seawater.
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Re: Cape dams - not good

Unread post by kudu177 » Mon Oct 19, 2020 12:19 pm

rare bird wrote:
Sun Oct 18, 2020 2:18 pm
yes, and apart from the influx of migrants (not only from Transkei - also many from Zim and DRC) the loss of habitat & changes to irrigated farmland (summer crop in a winter rainfall region - i.e. vineyards) has continued.
Irrigation accounts for half of the water used (actually more than half in the summer months!)
You can grow anything you like in a desert. Those vines like the heat and the mineral soil. But someone or something -- somewhere -- will bear the huge burden. In California's case, it's the viability of the Colorado River as a free-running waterway.

The state's water usage is off the charts. Them almonds need a lot of moisture. LA waters its emerald-green gardens with abandon (or they did until the first of the recent hard droughts).

SA is well on the same path to self-destruction.

Some links to really good stories about the California water problem below.

https://www.theguardian.com/environment ... griculture

https://projects.propublica.org/killing ... on-project

https://www.propublica.org/series/killing-the-colorado

https://www.motherjones.com/environment ... nia-water/

https://www.forbes.com/sites/chloesorvi ... 2046cc3713
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