Simon Beecham is currently Professor of Sustainable Water Resources Engineering at the University of South Australia. He has worked at the forefront of international research into water resources management since 1986. During the last twenty years, he has made significant contributions to the understanding of urban drainage hydraulics and more recently total water cycle management and water sensitive urban design.

Simon is author of the Syfon Model, which was used to design the Roofwater Harvesting System at the Sydney Olympic (Telstra) Stadium as well as the airport terminal roof drainage systems at Hong Kong (Chek Lap Kok), Sydney and Adelaide. Following this work he was appointed Chair of the Standards Australian committee charged with developing one of the world's first standards on siphonic roof drainage.

In addition to writing the Syfon program, Prof. Beecham is also author of the SWITCH and Switch2 water sensitive urban design (WSUD) software packages which are recommended in Engineers Australia's Australian Runoff Quality (ARQ) Manual. Switch2, which was developed as part of a research project involving industry partner Sydney Water Corporation, models total water cycle management in residential, commercial and industrial developments.

Since 1998, Simon has been Engineers Australia's representative on the IWA/IAHR's International Group on Urban Rainfall.

Jim is a professional Agricultural and Environmental Engineer with over 20 years of experience in consultingengineering and research and development. He has an array of skills including training in agricultural sciences, participation in original research into soils and water chemistry, training in engineering and experience as an engineering designer in water resources.

As one of the founders of Stormwater Management Inc. Jim Lenhart led the design efforts of the StormFilter and StormScreen since its inception. In his capacity as Chief Technology Officer with CONTECH Stormwater Solutions, Jim directs the R&D, Product Evaluation and Regulatory Services departments. Some of his specific experiences include research on zeolite turf filters, the design of storm systems and water quality treatment facilities for major roadways and industrial developments and the statistical and physical modeling of hydrologic processes. Jim has authored over 20 papers on the subject of water quality and stormwater treatment.

His strong technical background is demonstrated as an adjunct instructor of Civil Engineering at Portland State University where he taught hydrology, hydraulics and water resources engineering. Jim currently is an active member of the Water Environment Research Foundation, ASCE and serves as a board member of the New Jersey Corporation for Advanced Technology.

Grant Witheridge is a Civil Engineer with both Bachelor and Masters degrees from the University of NSW. He has some 27 years experience in the fields of hydraulics, creek engineering and erosion & sediment control during which time he has worked for the NSW Public Works Department, the University of NSW, Brisbane City Council and Griffith University. Currently Grant works through his own company Catchments & Creeks Pty Ltd while continuing to lecture part time at Griffith University.

Grant is the principle author of publications such as Brisbane City Council's - Natural Channel Design Guidelines, Creek Erosion Guidelines, Instream Sediment Control Guidelines and Sediment Basin Design Guidelines plus the National Guidelines on Fish passage Requirements for Waterway Crossings.