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Type: Thesis
Title: Salt mobilisation in a floodplain environment: using EM techniques to identify mechanisms that alter the distribution of saline groundwater
Author: Hamilton-Smith, D. A.
Issue Date: 2013
School/Discipline: School of Physical Sciences
Abstract: River Murray floodplain systems have become highly salinised through river regulation and historical irrigation practices. Naturally, floodplain inundation is the hydraulic mechanism that reduces the concentration of salt on the floodplain. Flushing of saline groundwater through lateral flow following river recession post flooding was previously unidentified. Geophysical techniques have been utilised to collect subsurface conductivity data on Clark’s Floodplain, a typical Murray floodplain system. Conductivity data on the floodplain is well constrained, and change in its distribution after the 2010/2011 River Murray flood has been interpreted to identify three freshening mechanisms. They include vertical infiltration of flood water and bank recharge during overbank flows, as well as lateral flow of groundwater after river regression.
Dissertation Note: Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Earth and Environmental Sciences, 2013
Where: River Murray, South Australia
Keywords: Honours; Geology; salinity; flooding; inundation; freshening; groundwater; lateral flow; TEM
Description: This item is only available electronically.
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