KA have conducted hydrogeological and numerical groundwater flow and solute transport model assessments for the mining industry since incorporation in September 1994 over a period of more than 22 years.

Dr Frans Robert Peter Kalf  B.Sc., Cert. Eng. Hyd., M.App.Sc., PhD. Principal/Director over 47 years, conducted and supervised hydrogeological investigations, and personally developed and applied a variety of numerical models in the previous NSW Department of Water Resources, then as a Principal in Australian Groundwater Consultants (AGC) followed by Kalf and Associates Pty Ltd.


He now conducts Peer Reviews of groundwater and modelling assessment reports  for environmental and modelling consultants and government approval projects.

Dr Kalf was awarded a Churchill Fellowship in 1975 to study groundwater-modelling techniques in USA, and Europe.


He specialises in hydrogeological impact assessments and is a recognised expert in model simulation of groundwater systems.  He pioneered the development of  analytical and finite difference models in Australia in the early 70’s and a 3D variably saturated linear and non-Darcy finite element model in the late 80's.  He has conducted studies using these numerical models in numerous alluvial valley groundwater systems; open pit and underground stoping, and sub-level caving inflow and impact assessments at  gold , coal and uranium mining sites; gold tailings storage seepage and contaminant transport; landfill, light hydrocarbon and dense chlorinated hydrocarbon aquifer contamination, water supply assessments; evaporation basin operation, including density dependent model analysis.

During early years with the then Department of Water Resources he was involved as a hydrogeologist with groundwater investigations of the inland drainage systems including the Lachlan and Murrumbidgee groundwater River systems including modelling of these systems. More recently he conducted a peer review of the salinity SEMMP model for the Murray Darling Basin Authority.


He was an expert witness at the successful Cadia Gold mine and Newcrest Ridgeway EIS inquiries. He completed hydrogeological impact studies and numerical modelling of impacts for the Newcrest-Cadia and Ridgeway gold mines in NSW.  In association with the Water Research Laboratory Manly Vale (WRL) he was also project manager for the complete hydrogeological investigation of the Ridgeway project which including drilling supervision and pumping tests by WRL.

Dr Kalf has extensive experience at the Ranger and Jabiluka Uranium sites.  The Australian government, together with a number of other experts, commissioned him to carry out a critical hydrogeological review and contaminant modelling of the proposed Jabiluka uranium mine tailings disposal. This study was prepared for and in response to a report prepared by a UNESCO delegation that visited Australia in 1998. Subsequently it included simulation and risk analyses of the closure of the Jabiluka underground mine. He has also conducted numerous hydrogeological assessments and individual court cases as an expert witness for gold, coal and sand mining projects.

In March 2010 he was recipient of a lifetime achievement award in hydrogeology by the International Association of Hydrogeologists.