Group on Earth Observation (GEO) Proposal: GNSS and InSAR for (Ground) Water Resource Development and Drought Mitigation

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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
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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

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Partners
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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

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Deep groundwater studies
CAGE study area
Swartberg Range
DAGEOS study area
CoCT study area
Little Karoo
Overstrand study area
Outeniqua Range
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DAGEOS Study Area
Oudtshoorn
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DAGEOS oblique view
Hot spring
Oudtshoorn
Blossoms
15 km
Hot spring
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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
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Southern DAGEOS Targets
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Outeniqua-Swartberg structural profile
(after Coetzee Haelbich, 1983)
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Artesian free-flow test (July 2008)
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Artesian flow test Sep-Nov 2009

• Layflat hose with discharge in furrow 5 m above
  wellhead

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Monitoring Sites
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Far-field impact monitoring
Blossoms
GZ335
15 km
GZ337
DB7
SAB Miller hops farms
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Wider Natural Laboratory concept

• 2 x cGPS receivers
• 2 x field geodetic GPS receivers
• Gravity benchmark campaigns
• GPS levelling surveys

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THANK YOU