This book is a comprehensive guide to hydrogeodesy, an interdisciplinary field that integrates geodetic techniques with hydrology to study Earth’s water cycle. It is designed for researchers, professionals, and students in geodesy, hydrology, and environmental sciences who seek to understand how geodetic methods, including satellite gravimetry, GNSS, and remote sensing, contribute to monitoring water resources. This book is structured into three main sections: Foundations of Hydrogeodesy, Geodetic Remote Sensing, and Hydrogeodesy in Practice. The first section lays the theoretical groundwork, covering Earth’s gravity field, shape, rotation, and reference frames. The second section focuses on satellite-based techniques, such as gravimetry (GRACE), altimetry, interferometric SAR, and GNSS, which provide critical data on water storage and movement. The final section applies these concepts to real-world issues, including groundwater monitoring, surface water dynamics, cryosphere studies, and hydrological extreme events like floods and droughts. This book addresses the growing challenge of water resource management in a changing climate. The book provides insights into water availability, sustainability, and disaster response by using hydrogeodetic tools. It bridges the gap between geodetic science and hydrological applications, offering practical solutions for policymakers and scientists working on global water security.

Dr. Vagner Ferreira is a researcher specializing in groundwater resource assessment, satellite remote sensing, and geodesy. He has extensive experience working with GRACE satellite data to study terrestrial water storage and hydrological processes. His research focuses on environmental geodesy, satellite-based monitoring of terrestrial water storage, and hydrological applications including drought characterization and groundwater assessment. Dr. Ferreira has published extensively in peer-reviewed journals and has contributed to international conferences. He is actively involved in academic teaching and training, including hands-on courses in groundwater assessment and satellite-based hydrology. His work has been instrumental in advancing geodetic applications for sustainable water management, particularly in regions facing water scarcity. Dr. Ferreira is also engaged in collaborative projects with international institutions, fostering interdisciplinary research and capacity-building initiatives.