Catchment hydrology and flood modelling

Dr Petter Nyman

Dr. Petter Nyman is a hydrologist with over 20 years of research and consulting experience. He combines his technical expertise in hydrology with effective communication skills to drive impactful projects and achieve tangible outcomes through innovation and collaboration. Petter excels at the intersection of research and practice, consistently integrating science, novel methods, and evidence into the services we offer. He is passionate about using science communication and knowledge transfer to enhance decision-making.<br><br>At Alluvium Group, Petter applies his hydrology expertise to a wide range of projects, including catchment hydrology, climate risks, bushfire management, water security, forest ecohydrology, erosion, and geomorphic hazards. With an analytical mindset and advanced technical skills, he leads projects involving big spatial data, modeling, coding, and remote sensing technologies. These efforts generate evidence, tools, and insights that improve decision-making and outcomes for water and land management sectors, both in Australia and internationally.<br><br>Throughout his career, Petter has published over 40 peer-reviewed journal articles on hydrology, bushfire, and forest science. He continues to engage with the research sector by supervising PhD students and conducting applied research at the intersection of hydrology, climate change, land use, and bushfire.<br><br>Petter is currently the Hydrology Business Area Lead at Alluvium.

Tony Weber

Tony is one of Australia’s leading practitioners in the catchment modelling and water quality field. He has worked in both government and consulting roles in the water quality discipline at technical and management levels, including in water treatment, laboratory analysis, strategic planning, research coordination, consulting and peer review areas. Tony has over 30 years’ experience in the water industry delivering a range of catchment modelling, water sensitive urban design, integrated water management, water quality and stormwater management projects.<br><br>Through involvement in research centres and academia, Tony has been involved in the development and application of Australia’s National Hydrologic Modelling Platform, Source, and the urban stormwater software MUSIC. He has applied these in more than 100 projects across Australia and internationally, including South East Asia, India, Korea, China, the United Kingdom and Europe. In recognition of his efforts in promoting modelling and the modelling community, Tony was awarded the 2012 Fellowship for the Modelling and Simulation Society of Australia and New Zealand. Tony has been an author in numerous research papers and presented his research both nationally and internationally.<br><br>Tony is passionate about collaboration and science-based decision making and promotes these in all his projects and is a strong promoter of incorporating decision making frameworks, uncertainty assessment and incorporating climate variability and climate change understanding in project delivery. He also is regularly called on to provide independent reviews, assessments and expert witness roles across a range of hydrologic and water quality issues, especially within the Great Barrier Reef and Murray Darling Basins.<br><br>In 2009, Tony was invited to become a Visiting Fellow at the Fenner School in Australian National University, and in 2016 was appointed as a Visiting Scientist at CSIRO Land and Water's Basin Management Outcomes group in Canberra. In 2025, he was also been appointed as an Industry Fellow at Griffith University’s Australian Rivers Institute.

Dr Anthony Kiem

Anthony is an Associate Professor of Hydroclimatology at the University of Newcastle, Australia, where he leads the Centre for Water, Climate and Land (CWCL). The CWCL is a partnership between the University of Newcastle and Alluvium that focuses on understanding and dealing with the impacts of climate variability and change in the Asia-Pacific region. <br><br>For more than 22 years, Anthony has been involved in a range of projects where insights into the impacts of climate variability and change are used to enable stakeholders from public and private sector organisations to better assess their climate related risk and to develop more informed climate adaptation and mitigation strategies. Of particular interest are hydrological extremes and how these may change in the future.

Lisa Walpole

NSW Regional Manager

Lisa is NSW Regional Manager and a water resources engineer with more than 15 years’ domestic and international experience working with clients to support complex decision-making processes. Lisa’s strengths lie in combining a technical and analytical background with a strategic lens, to understand trade-offs to find a balanced solution.<br><br>Lisa has been heavily involved in supporting NSW in implementation of the Basin Plan, specifically the Reconnecting River Country Program, review of Coastal Harvestable Rights limits and localised environmental water planning. Lisa is passionate about working with various stakeholders to understand aligning and conflicting views and interests, to find a way forward.<br><br>With a passion for developing holistic, collaborative and innovative solutions to catchment management and water delivery challenges, Lisa completed her Master of Integrated Water Management with the International Water Centre in 2020.