Abstract
The lower parts of the Okavango Delta, Botswana comprised of multi layered unconsolidated fresh water aquifer systems developed in the Kalahari Sands and a lower bedrock aquifer within the Karoo Sandstones. The Kalahari aquifers consist of fine to medium sands intervened at various levels by numerous semi-confining units of clays, sandy silts and sandy clays. The lower bedrock aquifer is saline. An investigation of these different aquifer systems was carried using airborne, surface and borehole geophysics in order to quantify the groundwater potentials of the areas. The airborne surveys consisted of magnetic and Electromagnetic surveys, the ground geophysical surveys consisted mainly of Transient Electromagnetic (TEM) and the borehole surveys consisted of gamma and resistivity logging. A comprehensive analysis of the geophysical surveys results along with borehole drilling and logging results assisted in defining the lateral and depth extent of the freshwater aquifers and also guided the successful location, drilling and testing of production boreholes in the study areas. Borehole yields range from as low as 9m 3/hr to as high as 120 m 3/hr in the Kunyere areas whilst in the Gomoti areas yields range from 50 m 3/hr to as high as 110 m 3/hr.
| Original language | English |
|---|---|
| Title of host publication | 19th Symposium on the Application of Geophysics to Engineering and Environmental Problems, SAGEEP 2006: Geophysical Applications for Environmental and Engineering Hazzards - Advances and Constraints |
| Pages | 871-885 |
| Number of pages | 15 |
| Volume | 1 |
| Publication status | Published - 2006 |
| Event | 19th Symposium on the Application of Geophysics to Engineering and Environmental Problems: Geophysical Applications for Environmental and Engineering Hazzards - Advances and Constraints, SAGEEP 2006 - Seattle, WA, United States Duration: Apr 2 2006 → Apr 6 2006 |
Other
| Other | 19th Symposium on the Application of Geophysics to Engineering and Environmental Problems: Geophysical Applications for Environmental and Engineering Hazzards - Advances and Constraints, SAGEEP 2006 |
|---|---|
| Country | United States |
| City | Seattle, WA |
| Period | 4/2/06 → 4/6/06 |
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All Science Journal Classification (ASJC) codes
- Geophysics
- Environmental Engineering
Cite this
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Conjunctive use of geophysical techniques in optimizing the groundwater potential in the Kunyere and Gomoti areas of the Okavango Delta, Botswana. / Shemang, Elisha M.; Molwalefhe, Loago N.; Ntsatsi, Joel.
19th Symposium on the Application of Geophysics to Engineering and Environmental Problems, SAGEEP 2006: Geophysical Applications for Environmental and Engineering Hazzards - Advances and Constraints. Vol. 1 2006. p. 871-885.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - Conjunctive use of geophysical techniques in optimizing the groundwater potential in the Kunyere and Gomoti areas of the Okavango Delta, Botswana
AU - Shemang, Elisha M.
AU - Molwalefhe, Loago N.
AU - Ntsatsi, Joel
PY - 2006
Y1 - 2006
N2 - The lower parts of the Okavango Delta, Botswana comprised of multi layered unconsolidated fresh water aquifer systems developed in the Kalahari Sands and a lower bedrock aquifer within the Karoo Sandstones. The Kalahari aquifers consist of fine to medium sands intervened at various levels by numerous semi-confining units of clays, sandy silts and sandy clays. The lower bedrock aquifer is saline. An investigation of these different aquifer systems was carried using airborne, surface and borehole geophysics in order to quantify the groundwater potentials of the areas. The airborne surveys consisted of magnetic and Electromagnetic surveys, the ground geophysical surveys consisted mainly of Transient Electromagnetic (TEM) and the borehole surveys consisted of gamma and resistivity logging. A comprehensive analysis of the geophysical surveys results along with borehole drilling and logging results assisted in defining the lateral and depth extent of the freshwater aquifers and also guided the successful location, drilling and testing of production boreholes in the study areas. Borehole yields range from as low as 9m 3/hr to as high as 120 m 3/hr in the Kunyere areas whilst in the Gomoti areas yields range from 50 m 3/hr to as high as 110 m 3/hr.
AB - The lower parts of the Okavango Delta, Botswana comprised of multi layered unconsolidated fresh water aquifer systems developed in the Kalahari Sands and a lower bedrock aquifer within the Karoo Sandstones. The Kalahari aquifers consist of fine to medium sands intervened at various levels by numerous semi-confining units of clays, sandy silts and sandy clays. The lower bedrock aquifer is saline. An investigation of these different aquifer systems was carried using airborne, surface and borehole geophysics in order to quantify the groundwater potentials of the areas. The airborne surveys consisted of magnetic and Electromagnetic surveys, the ground geophysical surveys consisted mainly of Transient Electromagnetic (TEM) and the borehole surveys consisted of gamma and resistivity logging. A comprehensive analysis of the geophysical surveys results along with borehole drilling and logging results assisted in defining the lateral and depth extent of the freshwater aquifers and also guided the successful location, drilling and testing of production boreholes in the study areas. Borehole yields range from as low as 9m 3/hr to as high as 120 m 3/hr in the Kunyere areas whilst in the Gomoti areas yields range from 50 m 3/hr to as high as 110 m 3/hr.
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M3 - Conference contribution
AN - SCOPUS:84866048528
SN - 9781622760657
VL - 1
SP - 871
EP - 885
BT - 19th Symposium on the Application of Geophysics to Engineering and Environmental Problems, SAGEEP 2006: Geophysical Applications for Environmental and Engineering Hazzards - Advances and Constraints
ER -