Book excerpt: From Catchment Management to Managing River Basins: Science, Technology Choices, Institutions and Policy synthesizes key scientific facts crucial for catchment assessment, planning and river basin water accounting. The book presents extensive reviews of international literature on catchment hydrology, forest hydrology and other hydrological processes, such as groundwater-surface water interactions. It discusses not only the science of catchment assessment and planning, but also the catchment planning process. It documents several of the positive international experiences with integrated catchment management and integrated basin management, distilling key learnings. Case studies from India and other parts of South Asia are also included, along with new pilot studies. Finally, the book discusses the theoretical and operational aspects of integrated catchment management and integrated water management in river basins using international best practices and case studies. - Discusses the theoretical nuances of scale effects in hydrology and land-use hydrology interactions - Focuses on managing water in a situation in which water has become scarce - Provides a theoretical discussion on water accounting procedures that is followed by an application of the methodology and tools in real-life case studies in two river basins of India - Presents applications of the concept of integrated water resources management for developing a WRM plan for an Indian river basin