This document serves as the official national guide for managing flood risks and estimating rainfall across Australia. Published by Engineers Australia, it provides a comprehensive framework for practitioners to calculate the likelihood and impact of water-related events using updated meteorological data and hydroinformatics. A significant focus is placed on climate change, offering specific methods to adjust historical design curves to reflect modern warming levels and rising sea heights. The text also outlines risk-based design strategies, utilizing economic tools like cost-benefit analysis to help authorities plan resilient infrastructure. Through detailed technical chapters, it explores the data cycle, from g ...