Document Type


Publication details

Johnston, SG 2004, 'The hydrology, biochemistry and management of drained coastal acid sulphate soil backswamps in the lower Clarence River floodplain', PhD thesis, Southern Cross University, Lismore, NSW.

Copyright SG Johnston 2004


This study examined the water quality and hydrological characteristics of several artificially drained acid sulphate soil (ASS) backswamps on the lower Clarence River coastal floodplain. Drainage fluxes of acidity and deoxygenating compounds were quantified and biogeochemical processes affecting the chemical characteristics of surface waters investigated. Alteration of groundwater and soil geochemistry due to encroachment of Melaleuca quinquenervia was examined. The effects of a weir and tidal exchange on acid export, drain water quality and groundwater behaviour were also assessed.