Day1 2 3

1. By
Abraham Nehemia
Department of Water Affairs & Forestry

2. 2
Stampriet Basin
Country Area 824,292
km2
Basin Area
71,000 km2
WINDHOEK
Olifantsriver
Nossob
river
Auobriver
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
KKKKKKHHHHHHOOOOOOMMMMMMAAAAAASSSSSS
OOOOOOMMMMMMAAAAAAHHHHHHEEEEEEKKKKKKEEEEEE
HHHHHHAAAAAARRRRRRDDDDDDAAAAAAPPPPPP
KKKKKKAAAAAARRRRRRAAAAAASSSSSS
Study Area
Communal Farm
Commercial Farm
Town
Village
Ephemeral River
National Roads
Main Roads
Regions
Legend
Study Area
W I NDHO E K
ANGOLA
NAMIBIA
ZAMBIA
BOTSWANA
SOUTHAFRICA
ZIMBABWE
ATLANTICOCEAN

3. 3
Catchment Area
N
EW
S
Auob Catchment Area
%U
%U
%U
%U
%U
%U
%U
%U
%U
%U
%U
%U
%U
%U
%U
%U
%U
%U
%U
%U
%[
%[
%[
%[
%[
%[
Tses
Koes
Dobbin
Mentz
Gochas
Schlip
Tsum is
Gibeon
Aranos
Aminius
Genes is
Corridor
Kom narib
Duinev eld Hoachanas
Stam priet
Mata-Mata
Uhlenhorst
W anderv ogel
Klein Vaalgras
Gobabis
Rehoboth
Kalkrand
W indhoek
Mariental
Leonardv ille
Auob Catchment Area
Nossob Catchment Area
Study Area
%U Town
%[ Main Town
Aminuis
Nossob Catchment Area
0 40 80 (km)
27° 27°
26° 26°
25° 25°
24° 24°
23° 23°
22° 22°
17°
17°
18°
18°
19°
19°
20°
20°
Auob River
Catchment
55,000 km2
Nossob River
Catchment
47,000 km2

4. Part of the Orange-Senqu Basin

5. 5
Geomorphology
#Y
#Y#Y
#Y#Y#Y
#Y#Y#Y
#Y
#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
W indhoek
Mariental
Leonardville
Tses
Koes
Mentz
Gochas
Schlip
Tsumis
Dobbin
Gibeon
Aranos
Am inius
Genesis
Corridor
Komnarib
Duineveld Hoachanas
Stampriet
Mata-Mata
Uhlenhorst
W andervogel
Klein Vaalgras26° 26°
25° 25°
24° 24°
23° 23°
17°
17°
18°
18°
19°
19°
20°
20°
Auob River
Olifants River
Nossob River
Elevation
750 - 900m
900 - 950m
950 - 1000m
1000 - 1050m
1050 - 1100m
1100 - 1150m
1150 - 1200m
1200 - 1300m
1300 - 1400m
1400 - 1600m
1600 - 1800m
1800 - 2000m
2000 - 2500m
River 3
River 2
River 1
#Y JICA BH
Road
Main Road
% Town
%[ Main Town
Study Area
Aminius
N
EW
S
0 20 40 60 80 Kilometers
d
d
d
d
d
d
d
d
dd
dd
dd
d
dd
d
d d
d
d d
d
d
dd
ddd
d
d
dd
d
d
d
d
d
d
d
d
d
dd d
d
d
dddd
ddd
ddd
d
d
d
d
d
d
d
d
d
d
d d
d
d
d
d
d
d
d
dd
d d
d
d
d
dd
#0
#0
#0
#0
#0
#0
#0
#0
#0
%U
%U
%U
%U
%U
%U
%U
%U
%U
%U
%U
%U
%U
%U
%U
%U
%U
%U
%[
%[
%[
%[
J-1
J-2
J-3
J-4
J-5
J-6
J-7
J-8
J-9
Go ba bis
R eh obo th
Ka lkran d
W indh oe k
Marien tal
Leo nard ville
Tses
Koes
Dobbin
Mentz
Gochas
Gibeon
Aranos
Aminius
Genes is
Corridor
Kom narib
Duinev eld
Hoachanas
Stam priet
Mata-Mata
Uhlenhorst
W anderv ogel
Klein Vaalgras
N
EW
S
Low H il (Bed roc k)
Moderate H ill (Bed rock )
High H ill (Bed roc k)
Moderate H ill (Sand dune)
Low H ill (Sand dune )
High H ill (Sand dune)
d Vegetation
Vegetation
Study Area
Road
Main R oad
River
Main R iver
Cliffs
Drainage
Major Pans
Pans
#0 JIC A Borehole
Directions of w inds
%U Town
%[ Major T ow n
Aminuis
0 40 80 (Km)
26° 26°
25° 25°
24° 24°
23° 23°
18°
18°
19°
19°
20°
20°
Topography Elevation

6. 6
Meteorology

7. 7
Hydrogeological Classification
Upper (sand)
Lower (shale) 3rd Impermeable Layer
A5(sand) A5
A4(shale) A4
A3(sand) A3
A2(shale) A2
A1(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 Member
A1
PrinceAlbertFormation
Kalahari Beds

8. 8
Geological Cross Section
700
800
900
1000
1100
1200
1300
1400
(m ASL)
NW SE
50 100 150 200 250 3000 (Km)
K Kalahari Beds
B Kalkland Basalt
Do Karoo Dolerite
R Rietmond Member
A Auob Member
M Mukorob Member
N Nossob Member
P.E. Pre-Ecca Group
Geological Cross Section-6
2641823769
396
514
105658
6646
J-9(Swart Modder)
J-5(Martzivilla)
110
1288
392
528
GR-1
555
ACP-29
ACP-30
2931
12756
JO5-N(7995)Goachas
452
DWA-2
J-8(Tweeriver)
32272
328
1310
N
N
P.E.
P.E.
N
P.E.
Do
P.E.
B
B
M
M
M
A
A
A
A
A
R
R
R
R
R
R
K
K
K
K
Hoachanas
Stampriet
Gochas
Auob R.
Tweeriver
Auob R.
Section-3 Section-4
Section-2Section-1
Geological Cross Section of Stampriet Basin

9. 9
Water Quality (TDS)
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%[
%[
%[
%[
%[
%[
#0
#0
#0
#0
#0
#0
#0
#0
#0
J-1
J-2
J-3
J-4
J-5
J-6
J-7
J-8
J-9
Gobabis
Rehoboth
Kalkrand
Windhoek
Mariental
Leonardville
Tses
Koes
Dobbin
Mentz
Gochas
Schlip
Tsumis
Gibeon
Aranos
Aminius
Genesis
Corridor
Komnarib
Duineveld
Hoachanas
Stampriet
Mata-Mata
Uhlenhorst
Wandervogel
Klein Vaalgras
TDS of Kalahari
300 - 500
500 - 1000
1000 - 2000
2000 - 3000
3000 - 5000
5000 - 10000
10000 - 20000
20000 - 30000
30000 - 40000
Road
Main Road
% Town
%[ Main Town
#0 JICA Test Well
Study Area
N
EW
S
0 20 40 (Km)
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%[
%[
%[
%[
%[
%[
#0
#0
#0
#0
#0
#0
#0
#0
#0
J-1
J-2
J-3
J-4
J-5
J-6
J-7
J-8
J-9
Gobabis
Rehoboth
Kalkrand
Windhoek
Mariental
Leonardville
Tses
Koes
Dobbin
Mentz
Gochas
Schlip
Tsumis
Gibeon
Aranos
Aminius
Genesis
Corridor
Komnarib
Duineveld
Hoachanas
Stampriet
Mata-Mata
Uhlenhorst
Wandervogel
Klein Vaalgras
TDS of Auob
300 - 500
500 - 1000
1000 - 2000
2000 - 3000
3000 - 5000
5000 - 10000
10000 - 20000
20000 - 30000
30000 - 40000
Road
Main Road
% Town
%[ Main Town
#0 JICA Test Well
Study Area
N
EW
S
0 20 40 (Km)
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%[
%[
%[
%[
%[
%[
#0
#0
#0
#0
#0
#0
#0
#0
#0
J-1
J-2
J-3
J-4
J-5
J-6
J-7
J-8
J-9
Gobabis
Rehoboth
Kalkrand
Windhoek
Mariental
Leonardville
Tses
Koes
Dobbin
Mentz
Gochas
Schlip
Tsumis
Gibeon
Aranos
Aminius
Genesis
Corridor
Komnarib
Duineveld
Hoachanas
Stampriet
Mata-Mata
Uhlenhorst
Wandervogel
Klein Vaalgras
TDS of Nossob
300 - 500
500 - 1000
1000 - 2000
2000 - 3000
3000 - 5000
5000 - 10000
10000 - 20000
20000 - 30000
30000 - 40000
Road
Main Road
% Town
%[ Main Town
#0 JICA Test Well
Study Area
N
EW
S
0 20 40 (Km)
Kalahari Aquifer Auob Aquifer Nossob Aquifer

10. Acknowledgements
Data from the following investigations were used
for this presentation:
PCI JICA study of the Stampriet Artesian Basin
Transboundary Stampriet Artesian Aquifer by Prof
Jurgen Kichner

11. Thank you

12. 12
Present Groundwater Use
6.89 (46%)
5.69 (38%)
2.36 (16%)
Irrigation
Domestic
Stock Watering
(Unit: million m3/y)