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oa Groundwater recharge investigation using towed imaging devices
- Australian Society of Exploration Geophysicists
- Source: ASEG Extended Abstracts, Volume 2009, Issue ASEG2009 - 20th Geophysical Conference, Dec 2009, p. 1 - 9
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- 01 Dec 2009
Abstract
An increase in demand for bulk water storage free from evaporation loss has led to increased interest in groundwater. Full knowledge of groundwater recharge hotspots and flow pathways is needed for best management of both groundwater and surface water where both may interact. Electrical conductivity (EC) is usually the most appropriate property to use for economical imaging of recharge hotspots and groundwater flow pathways. Both galvanic and electromagnetic imaging techniques readily resolve recharge pathways due to the combined effect, on bulk electrical conductivity, of low clay content associated with recharge pathways and low salinity of surface water that is the source of the recharge. The key to viable recharge projects is provision of detailed information on the existing and potential recharge pathways; this can most effectively be provided using new specialized geophysical technology.