Conjunctive use of geophysical techniques in optimizing the groundwater potential in the Kunyere and Gomoti areas of the Okavango Delta, Botswana

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    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 languageEnglish
    Title of host publication19th Symposium on the Application of Geophysics to Engineering and Environmental Problems, SAGEEP 2006: Geophysical Applications for Environmental and Engineering Hazzards - Advances and Constraints
    Pages871-885
    Number of pages15
    Volume1
    Publication statusPublished - 2006
    Event19th 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 2006Apr 6 2006

    Other

    Other19th Symposium on the Application of Geophysics to Engineering and Environmental Problems: Geophysical Applications for Environmental and Engineering Hazzards - Advances and Constraints, SAGEEP 2006
    CountryUnited States
    CitySeattle, WA
    Period4/2/064/6/06

    Fingerprint

    Botswana
    aquifers
    ground water
    Aquifers
    Groundwater
    boreholes
    Boreholes
    aquifer
    groundwater
    borehole
    Well logging
    sandy clay
    geophysical survey
    bedrock
    drilling
    sands
    clays
    Drilling
    Clay
    Sand

    All Science Journal Classification (ASJC) codes

    • Geophysics
    • Environmental Engineering

    Cite this

    Shemang, E. M., Molwalefhe, L. N., & Ntsatsi, J. (2006). Conjunctive use of geophysical techniques in optimizing the groundwater potential in the Kunyere and Gomoti areas of the Okavango Delta, Botswana. In 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, pp. 871-885)
    Shemang, Elisha M. ; Molwalefhe, Loago N. ; Ntsatsi, Joel. / Conjunctive use of geophysical techniques in optimizing the groundwater potential in the Kunyere and Gomoti areas of the Okavango Delta, Botswana. 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. pp. 871-885
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    title = "Conjunctive use of geophysical techniques in optimizing the groundwater potential in the Kunyere and Gomoti areas of the Okavango Delta, Botswana",
    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.",
    author = "Shemang, {Elisha M.} and Molwalefhe, {Loago N.} and Joel Ntsatsi",
    year = "2006",
    language = "English",
    isbn = "9781622760657",
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    Shemang, EM, Molwalefhe, LN & Ntsatsi, J 2006, Conjunctive use of geophysical techniques in optimizing the groundwater potential in the Kunyere and Gomoti areas of the Okavango Delta, Botswana. in 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, pp. 871-885, 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, 4/2/06.

    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 proceedingConference contribution

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    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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    Shemang EM, Molwalefhe LN, Ntsatsi J. Conjunctive use of geophysical techniques in optimizing the groundwater potential in the Kunyere and Gomoti areas of the Okavango Delta, Botswana. In 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