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Ground investigations using non-invasive methods
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Geophysics for Solar Energy InstallationsSo
lar E
nerg
y
TechnicalNote
TerraDat has accumulated a wealth of experience over the years, providing geophysical ground exploration services to the energy industry. By working alongside energy developers TerraDat has developed a suite of geophysical techniques ideally suited to the main needs of solar farm developers.
Archaeological magnetic gradiometry surveys are often required in the early stages of solar farm development. Due to the large areas involved, these surveys can be expensive and time consuming. TerraDat’s state of the art rapid archaeological acquisition system counters this, by providing up to 40ha of high-resolution magnetic gradiometry data per day. The increased efficiency of this system is because we use a towed multi-sensor rig. The survey results are delivered as fully interpreted plots in popular CAD/GIS formats to easily integrate with client’s systems.
To optimise PV locations and associated infrastructure works, a combination of magnetic, ground conductivity and microgravity surveys can be used to map underground hazards such as buried services, UXO, mine workings, solution features, voids and fracture zones.
Resistivity tomography surveys are used to provide information on the shallow geology and soil electrical properties for earthing design. This approach is more accurate than the traditional 4-pin method as it is possible to derive more reliable resistivity values. Thermal properties of the soil can be analysed by using a thermal resistivity meter to acquire data either at surface, or within trial pits.
Rapid Archaeological
Surveys
Underground Hazard
Mapping
Geotechnical Information
TerraDat (UK) Ltd - Tel (08707 303050)www.terradat.co.uk
The Sensys rig can be towed by a varietyof vehicles, from ATVs to tractors
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Example of finalised data - magnetic gradiometry to the leftand interperetive plot to the right, data can be suppled in avariety of CAD and GIS formats
Soil resistivity surveyBuried features revealed byground conductivity survey
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apid
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Contact Simon Hughes for more info; [email protected]
Resistivity vertical electrical sounding (left) and tomographic section (right)
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Chainage (m)
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Conductive till
Surface gravels
Resistivity (Ohm.m)
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Test 1Test 2
Resistive bedrock
