Dr Scott Johnston BAppSc(NE), PhD(SCU) Dr Scott Johnston's research interests are soil and water quality interactions and the coupling of hydrology and biogeochemistry in coastal floodplains. Dr Johnston's research has had a particular focus on interpreting and quantifying landscape-scale processes in acid sulfate soil environments, in order to assess and refine applied remediation and management techniques. He was awarded an APDI in 2008 and has worked closely with industry, state and local governments developing guidelines for managing broad-acre acid sulfate soil drainage. Recent research efforts aim to improve and transform our understanding of the hydro-geochemical consequences of rising sea-levels and climate change for iron, sulfur and arsenic cycling on coastal floodplains. For further information about any of these publications please contact the author.
Journal articles
Effects of hyper-enriched reactive Fe on sulfidisation in a tidally inundated acid sulfate soil wetland (with Annabelle F. Keene, Richard T. Bush, Leigh A. Sullivan, Edward D. Burton, Angus E. McElnea, Colin R. Ahern, and Bernard Powell), Biogeochemistry (2011)
Solid phase Fe and S fractions were examined in an acid sulfate soil (ASS) wetland...
Iron and arsenic cycling in intertidal surface sediments during wetland remediation (with Annabelle F. Keene, Edward D. Burton, Richard T. Bush, and Leigh A. Sullivan), Environmental Science and Technology (2011)
The accumulation and behavior of arsenic at the redox interface of Fe-rich sediments is strongly...
Iron geochemical zonation in a tidally inundated acid sulfate soil wetland (with Annabelle F. Keene, Richard T. Bush, Edward D. Burton, Leigh A. Sullivan, Lloyd S. Isaacson, Angus E. McElnea, Col R. Ahern, C Douglas Smith, and Bernard Powell), Chemical Geology (2011)
Tidal inundation is a new technique for remediating coastal acid sulfate soils (CASS). Here, we...
Tidally driven water column hydro-geochemistry in a remediating acidic wetland (with Annabelle F. Keene, Richard T. Bush, Leigh A. Sullivan, and Vanessa NL Wong), Journal of Hydrology (2011)
Managed tidal inundation is a newly evolved technique for remediating coastal acid sulphate soil (CASS)...
Abundance and fractionation of Al, Fe and trace metals following tidal inundation of a tropical acid sulfate soil (with Edward D. Burton, Richard T. Bush, Annabelle F. Keene, Leigh A. Sullivan, C Douglas Smith, Angus E. McElnea, Col R. Ahern, and Bernard Powell), Applied Geochemistry (2010)
Tidal inundation was restored to a severely degraded tropical acid sulfate soil landscape and subsequent...
Books and monographs
Floodgate and drain management on coastal floodplains: basic principles, Leaflet 3, Managing drains and tidal creeks for fish passage (with Andrew Bruce and Ferderieke Kroon), (2004)
Floodgate and drain management on coastal floodplains: basic principles, Leaflet 4, Managing salt water when opening floodgates (with Andrew Bruce and Ferderieke Kroon), (2004)
Theses
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 (2004)
Conference publications
A national demonstration site for acid sulfate soil remediation in the Australian tropics - an overview of the East Trinity environmental success story (with Colin R. Ahern, D Smith, Angus E. McElnea, Richard T. Bush, Steven T. Wilbraham, Simon van Heel, Annabelle F. Keene, Bernard Powell, and B Malone), Proceedings of the 19th World Congress of Soil Science, Soil Solutions for a Changing World (2010)
Assessment of saturated hydaulic conductivity in coastal floodplain acid sulfate soils (with Phillip Hirst, Peter G. Slavich, and Simon Walsh), Proceedings of the 19th World Congress of Soil Science, Soil Solutions for a Changing World (2010)
Climate change impacts on acid sulfate soil landscapes (with Richard T. Bush, Leigh A. Sullivan, Edward D. Burton, Annabelle F. Keene, Vanessa NL Wong, and L Mosley), Proceedings of Earth, energy and the environment: 20th annual VM Goldschmidt Conference (2010)
The anticipated impacts of climate change are warmer conditions, an increasing proportion of rainfall to...
Effectiveness of lime particle size in the neutralisation of sulfidic acid sulfate soil materials (with Kim M. Watling, Angus E. McElnea, Colin R. Ahern, Edward D. Burton, Annabelle F. Keene, Richard T. Bush, and Leigh A. Sullivan), Proceedings of the 19th World Congress of Soil Science, Soil Solutions for a Changing World, Brisbane (2010)
Evaluation of existing methods for assessing retained acidity in acid sulfate soil materials (with C Vithana, Leigh A. Sullivan, Richard T. Bush, and Edward D. Burton), Proceedings of the 19th World Congress of Soil Science, Soil Solutions for a Changing World (2010)
Reports
Assessment of hydraulic conductivity in coastal floodplain acid sulphate soils on the north coast of NSW (with Phillip Hirst, Peter G. Slavich, and Simon Walsh), Industry and Investment, NSW (2009)
Estuarine wetlands are characterised by complex interactions between vegetation type, surface water fluxes and porewater...
Reviewing indicators of sustainable agriculture: final report, NSW Department of Primary Industries (2007)
The hydrological effects of floodgate management on coastal floodplain agriculture: Final report for project DAN13 (with Peter G. Slavich), Land and Water Australia: NSW Agriculture (2004)
Hydraulic conductivity in the sulfuric horizons at Partridge Creek acid sulfate soil hotspot (with Peter G. Slavich and Phillip Hirst), Report to Hastings Council no. DAN13/1 (2003)
Restoring the balance : guidelines for managing floodgates and drainage systems on coastal floodplains (with Frederieke Kroon, Peter G. Slavich, Alan Cibilic, and Andrew Bruce), School of Environmental Science and Management Papers (2003)
These guidelines are written for people who actively manage coastal floodplain drainage systems, including local...