SAB geology, aquifers.
SAB geology, aquifers.

Stampriet Geology: The underground water

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Below the Kalahari sands, the underground geology is an alternating succession of layers of porous sandstone that carry water, the aquifers (orange and yellow), and non-porous, water-free mudstones (grey). Yellow layers are artesian, meaning that the water rises very high in a borehole and may even flow out on the surface, as in the Auob and Nossob river valleys in some places.

The underground layers extend into Botswana and South Africa. The deepest aquifer, the 25-meter-thick Nossob Formation, has limited yields and the water deteriorates in quality southwards. The main and strongest aquifer consists of the three sandstone layers of the Auob Formation. This ranges from 25 to 185 m in thickness. The Auob Formation provides all the drinking water for the towns from Leonardville to South Africa and from Stampriet to Botswana. It also provides all the good-quality water for irrigation. Many farms obtain water of variable quality from the orange Neu Loore Formation sandstones and the Kalahari sands.

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Namibian Sun 2024-11-10

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Premier League: Liverpool 2 vs 0 Aston Villa | Brighton 2 vs 1 Manchester City | Wolves 2 vs 0 Southampton | West Ham 0 vs 0 Everton | Crystal Palace 0 vs 2 Fulham | Brentford 3 vs 2 Bournemouth Katima Mulilo: 21° | 34° Rundu: 20° | 25° Eenhana: 19° | 29° Oshakati: 22° | 30° Ruacana: 20° | 31° Tsumeb: 21° | 30° Otjiwarongo: 18° | 30° Omaruru: 16° | 31° Windhoek: 15° | 28° Gobabis: 16° | 31° Henties Bay: 12° | 19° Wind speed: 26km/h, Wind direction: S, Low tide: 04:05, High tide: 10:43, Low Tide: 17:11, High tide: 23:27 Swakopmund: 14° | 15° Wind speed: 37km/h, Wind direction: SW, Low tide: 04:03, High tide: 10:41, Low Tide: 17:09, High tide: 23:25 Walvis Bay: 12° | 21° Wind speed: 39km/h, Wind direction: SW, Low tide: 04:03, High tide: 10:40, Low Tide: 17:09, High tide: 23:24 Rehoboth: 14° | 30° Mariental: 13° | 30° Keetmanshoop: 10° | 28° Aranos: 14° | 31° Lüderitz: 14° | 24° Ariamsvlei: 11° | 29° Oranjemund: 15° | 20° Luanda: 25° | 26° Gaborone: 18° | 22° Lubumbashi: 16° | 32° Mbabane: 17° | 21° Maseru: 12° | 26° Antananarivo: 15° | 32° Lilongwe: 23° | 34° Maputo: 21° | 29° Windhoek: 15° | 28° Cape Town: 15° | 24° Durban: 18° | 20° Johannesburg: 15° | 20° Dar es Salaam: 25° | 31° Lusaka: 22° | 34° Harare: 21° | 33° Currency: GBP to NAD 22.67 | EUR to NAD 18.84 | CNY to NAD 2.45 | USD to NAD 17.58 | DZD to NAD 0.13 | AOA to NAD 0.02 | BWP to NAD 1.25 | EGP to NAD 0.35 | KES to NAD 0.14 | NGN to NAD 0.01 | ZMW to NAD 0.64 | ZWL to NAD 0.04 | BRL to NAD 3.06 | RUB to NAD 0.18 | INR to NAD 0.21 | USD to DZD 133.15 | USD to AOA 909.05 | USD to BWP 13.4 | USD to EGP 49.25 | USD to KES 129.2 | USD to NGN 1664.84 | USD to ZAR 17.59 | USD to ZMW 27.2 | USD to ZWL 321 | Stock Exchange: JSE All Share Index Same 0 | Namibian Stock Exchange (NSX) Overall Index 1851.79 Down -1.41% | Casablanca Stock Exchange (CSE) MASI 14663.22 Up +1.21% | Egyptian Exchange (EGX) 30 Index 31267.47 Up +0.72% | Botswana Stock Exchange (BSE) DCI Same 0 | NSX: MTC 7.75 SAME | Anirep 8.99 SAME | Capricorn Investment group 17.34 SAME | FirstRand Namibia Ltd 49 DOWN 0.50% | Letshego Holdings (Namibia) Ltd 4.1 UP 2.50% | Namibia Asset Management Ltd 0.7 SAME | Namibia Breweries Ltd 31.49 UP 0.03% | Nictus Holdings - 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