In an era where sustainable water management is critical, the accurate identification and delineation of waterbodies have never been more important. Emerging Methodologies in Waterbody Delineation: An In-depth Review offers a comprehensive exploration of the cutting-edge techniques shaping the field today. From traditional cartographic practices to modern innovations such as satellite remote sensing, GIS-based mapping, and AI-driven algorithms, this book delves into the evolution of waterbody delineation. It examines the strengths and limitations of various approaches while highlighting the importance of integrating technology with environmental stewardship. Whether you're a researcher, environmentalist, or policymaker, this book provides the insights needed to navigate the complexities of hydrological mapping in a rapidly changing world. Authored by S. Rajeswari and P. Rathika, it stands as a definitive resource for advancing knowledge and practices in this crucial domain.