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IGCP 565 Workshop 4, WITS, South Africa, 21 – 22 Nov 2011

Group on Earth Observation (GEO) Proposal: GNSS and InSAR for (Ground) Water Resource Development and Drought Mitigation. A Mlisa and C Hartnady Umvoto Africa, Cape Town, South Africa www.umvoto.com. IGCP 565 Workshop 4, WITS, South Africa, 21 – 22 Nov 2011. Aims.

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IGCP 565 Workshop 4, WITS, South Africa, 21 – 22 Nov 2011

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  1. Group on Earth Observation (GEO) Proposal: GNSS and InSAR for (Ground) Water Resource Development and Drought Mitigation A Mlisa and C Hartnady Umvoto Africa, Cape Town, South Africa www.umvoto.com IGCP 565 Workshop 4, WITS, South Africa, 21 – 22 Nov 2011

  2. Aims • To demonstrate the use of high-precision GNSS technology as a tool for groundwater resource monitoring and assessment • To demonstrate the use of high resolution radar satellite (SAR) imagery as a tool for groundwater resource monitoring and assessment • To develop the methodology for relating SAR image interpretation and GNSS measurements of natural or abstraction-induced surface deformation and conjunctive hydrogeological data in order to derive the in-situ, bulk elastic properties (e.g., skeletal compressibility) of an underlying confined fractured-rock aquifer • To build South African capacity to establish the technical infrastructure (e.g., telemetry systems) and implement the data-processing methods required for a pilot GNSS-for-Groundwater scheme

  3. Partners

  4. Requested Resources • Access to radar imagery covering Oudtshoorn (DAGEOS) project area • Provision of approximately six new geodetic GPS receivers • Support for training and capacity building on GPS and radar data processing (e.g., GAMIT/GLOBK) • Funding for human resource and operational costs, • Estimated total cost Euro 1 540 874 for a period of 3 years

  5. Deep groundwater studies CAGE study area Swartberg Range DAGEOS study area CoCT study area Little Karoo Overstrand study area Outeniqua Range

  6. DAGEOS Study Area Oudtshoorn

  7. DAGEOS oblique view Hot spring Oudtshoorn Blossoms 15 km Hot spring

  8. Purpose of Study “To explore and quantify the deep artesian groundwater resource potential in the confined fractured-rock aquifers of the Table Mountain Group (TMG) within a water stressed catchment through the integrated application and further enhancement of structural-geological and remote-sensing/geophysical methods”

  9. Southern DAGEOS Targets

  10. Outeniqua-Swartberg structural profile (after Coetzee & Haelbich, 1983)

  11. Artesian free-flow test (July 2008)

  12. Artesian flow test – Sep-Nov 2009 Layflat hose with discharge in furrow ~5 m above wellhead

  13. Monitoring Sites

  14. Far-field impact monitoring Blossoms GZ335 ~15 km GZ337 DB7 SAB Miller hops farms

  15. Wider “Natural Laboratory” concept • 2 x cGPS receivers • 2 x field geodetic GPS receivers • Gravity benchmark campaigns • GPS levelling surveys

  16. THANK YOU

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