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Scott G Johnston

My research explores how physical, hydrological and geochemical characteristics of natural landscapes interact to control water quality.

I am particularly interested in developing a more holistic understanding of the interdependency of these three aspects of landscapes. The physical characteristics of landscapes, from macropore to toposequence scales, influence local hydrology. In turn, hydrology regulates redox geochemistry / flow dynamics and thus acts as a primary control on the subsequent speciation, transport and cycling of important elements in the environment.

Much of my work has focused on quantifying and interpreting landscape-scale processes within alternately flooded wetland soils with dynamic redox geochemistry. I have worked closely with industry, state and local governments to develop and refine techniques for remediating degraded wetlands.

Current research efforts embrace various aspects of environmental geochemistry and hydrology, from the mineral-water interface through to sub-catchment scale processes.


  • 2016–present
    Professor, Southern Cross University


  • 2005 
    Southern Cross University, PhD
  • 1993 
    University of New England, B.App.Sci.