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

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 Swartberg Range Outeniqua Range Little Karoo DAGEOS study area CAGE study area CoCT study area Overstrand study area

6. DAGEOS Study Area Oudtshoorn

7. DAGEOS oblique view Oudtshoorn Blossoms 15 km Hot spring

8. “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” Purpose of Study

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 ~15 km SAB Miller hops farms Blossoms GZ335 GZ337 DB7

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

16. THANK YOU