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Day2 2 joel
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L.Joel & G.Mulokoshi22 May
2014
STAMPRIET TRANSBOUNDARY AQUIFEROverview over Namibian
Groundwater Data
Locality Plan
WINDHOEK
Olifants river
Nossob riverAuob river
HERERO LAND
Aminuis
24゜
25゜
23゜
22゜
26゜
17゜ 18゜ 20゜
17゜ 18゜ 19゜ 20゜
22゜
23゜
24゜
25゜
26゜
19゜
N
0 50 100km
Mariental
Gochas
Aranos
Leonardville
Stampriet
Gibeon
Rehoboth
Schlip
Gobabis
Kalkrand
KKKKKKHHHHHHOOOOOOMMMMMMAAAAAASSSSSSOOOOOOMMMMMMAAAAAAHHHHHHEEEEEEKKKKKKEEEEEE
HHHHHHAAAAAARRRRRRDDDDDDAAAAAAPPPPPP
KKKKKKAAAAAARRRRRRAAAAAASSSSSS
Study Area
Communal Farm
Commercial Farm
Town
Village
Ephemeral River
National Roads
Main Roads
Regions
Legend
Study Area
W I N D H O E K
ANGOLA
NAMIBIA
ZAMBIA
BOTSWANA
SOUTHAFRICA
ZIMBABWE
ATLANTIC OCEAN
Country Area : 824,292 km2 Study Area : 71,000 km2
Population : 35,000 people
Meteorology
Geology
#Y
#Y
#Y
#Y
#Y
#Y
#Y
#Y
#Y
%
%
%
%
%
%
%
%
%
%
%%
%
%
%
%
%
%
%
%
%[
%[
%[
%[
%[
%[
J-1
J-2
J-3
J-4
J-5
J-6
J-7
J-8
J-9
Gobabis
Rehoboth
Kalkrand
Windhoek
Mariental
Leonardville
TsesKoes
Mentz
Gochas
Schlip
Tsumis
Dobbin
Gibeon
Aranos
Aminius
Genesis
Corridor
Komnarib
Duineveld Hoachanas
Stampriet
Mata-Mata
Uhlenhorst
Wandervogel
Klein VaalgrasKaroo DoleriteKalkrand BasaltPrince Albert F.Nossob M.Auob M.whitehill M.Dwyka G.Nama G.Damara S.RoadMain RoadStudy AreaAminius
#Y JICA Test BoreholeFault 2Fault 1Lineament 2Lineament1
% Town%[ Major Town
N
EW
S
0 1020 (Km)
26° 26°
25° 25°
24° 24°
23° 23°
17°
17°
18°
18°
19°
19°
20°
20°
Kalahari Beds
(Late Cretaceous-Present)
Kalkrand Basalt, Karoo Dolerite (Jurassic )
Prince Albert F.
(Permian)
Dwyka G. (Carboniferous)
Nama G. Damara S. (Cambrian-Pre-Cambrian)
Geology
700
800
900
1000
1100
1200
1300
1400
(m ASL)
NW SE
50 100 150 200 250 3000 (Km)
K Kalahari BedsB Kalkland BasaltDo Karoo DoleriteR Rietmond MemberA Auob MemberM Mukorob MemberN Nossob Member
P.E. Pre-Ecca Group
Geological Cross Section-6
N
N
P.E.
P.E.
N
P.E.
Do
P.E.
BB
M
M
M
A
A
A
A
A
R
R
R
R
R
R
K
K
K
K
Hoachanas
StamprietGochas
Auob R.TweeriverAuob R.
Section-3 Section-4
Section-2Section-1
< Fig.2-1 Geological Cross Section of Study Area >
Hydrogeological classification
Upper (sand)Lower (shale) 3rd Impermeable LayerA5(sand) A5A4(shale) A4A3(sand) A3A2(shale) A2A1(sand)Upper (sand)Lower (shale) 2nd Impermeable Layer
Nossob Aquifer (G1)
1st Impermeable LayerPre Ecca Group (Basement)
Hydrogeological ClassificationGeological Classification
Nossob Member
Kalahari Aquifer (G3)
Auob Aquifer (G2)
Rietmond Member
Auob Member
Mukarob MemberA1
Prin
ce A
lber
t Fo
rmat
ion
Kalahari Beds
Hydrogeological classification
D=450m
D=450m
700
800
900
1000
1100
1200
1300
1400
(m ASL)
SW
NE
50 100 150 200 250 3000 (Km)
Extensive and highlyproductive aquifer
Extensive and moderatelyproductive aquifer
Extensive and lowproductive aquifer
Local or discontinuousmoderately productive
Local or discontinuous lowto no productive aquifer
Strata with essentially nogroundwater resources
Auob Aquifer
Kalahari Aquifer
Nossob Aquifer
Kalkland Basalt
Karoo Dolerite
Pre-Ecca Group, LowerRietmond and Lower Mukarob
GochasAuob R.
GenesisNossob R.
Section-6Section-7 Section-5 Section-8
Hydrogeological Cross Section-3
GRIMGroundwater Resources Information
Metadata Whereabouts, Contents, etc. of some 200 documents
Some of them attached to the bibliography (from colonial times until today)
Listing of existing Data 1
CSIR Water Quality DataSome 4 000 water points information
Listing of existing Data 2
Farm; water use; and chemical analyses, 1965-1982
CSIR Water Quality Maps Four 1 : 1 000 000 Maps
Listing of existing Data 3
TDS, SO4, NO3, F (1982)
PhD THESIS TREDOUX ‘n Geohdrochemiese Ondersoek van die
Artesiese Kom Stampriet (1981)
Listing of existing Data 4
Electronic Borehole Data
Some 4 000 water points information
Listing of existing Data 5
Borehole completion reports and basic chemical data captured in Excel files and plotted on Master
Maps (since 1979)
GROWAS Namibian Water Points Information
Listing of existing Data 6
Borehole data; Chemical analyses; Statigraphy.Variable detail and accuracy (since the late 1990s).
JICA REPORTGeophysical, Geological, Drilling,
Monitoring Data
Listing of existing Data 7
Complete study of the SAB including Modelling
HydroCensus 2000-2002
Nearly 5 000 water points information
Listing of existing Data 8
GPS coordinates (Schwarzeck Datum); Water levels where accessible; EC; and farming information
IAEA Report RAF 8/029 Isotopic information
Listing of existing Data 9
14C; Tritium; and stable Isotopes (2000-2002).
Other Isotopic investigations
Vogel; Geyh; Talma; Verhagen; and others
Listing of existing Data 10
14-C; Tritium; stable Isotopes, 15-N (since about 1967).
WATER LEVEL DATA 22 Monitoring boreholes in the SAB
Listing of existing Data 11
Older data on charts, more recent data in electronic format (since the 1960s)
ABSTRACTION DATA 1 Production data from 5 Namwater
Schemes
Listing of existing Data 12
Monthly abstraction and Water level data, early data in DWA reports, recent Namwater data
electronic.
ABSTRACTION DATA 2 Abstraction data from Irrigation Farms
Listing of existing Data 13
Not complete, not always accurate, filed at Law Admin.
Hydrogeological Map 1 : 1 000 000 Map of Namibia
Listing of existing Data 14
Indication of Potential and Quality, with Brochure (2001)
Key references
GRIM
THANK YOU
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