River sediment salt-load detection using a water-borne transient electromagnetic system Brian Barrett a, * , Graham Heinson a , Michael Hatch b , Andrew Telfer c a CRC LEME, School of Earth and Environmental Sciences, University of Adelaide, Adelaide SA 5005, Australia b Zonge Engineering and Research Organisation, Frederick Street, Welland SA 5007, Australia c Australian Water Environments, 68 The Parade, Norwood SA 5067, Australia Received 10 August 2004; accepted 18 March 2005 Abstract ThesalinisationofmajorriversystemsinAustralia,andinothercountries,isprimarilydeterminedbytheupwardmovement of saline water from regional aquifers into the river. The migration has been accelerated due to irrigation schemes and farming practices that have changed regional hydraulic gradients driving saline

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