This book explores rivers, streams, flowing water, and waterfalls through the lens of a physicist, revealing how the principles of fluid dynamics explain natural phenomena. Rivers are complex physical systems, constantly interacting with their surroundings, and their study spans multiple disciplines—including physics, geology, soil science, and atmospheric science. By linking theoretical insight with the observable behaviour of water in natural environments, the book bridges academic study with the interests of outdoor enthusiasts—appealing to kayakers, canoeists, rafters, canyoners, anglers, and all those drawn to moving water.Designed primarily for undergraduate students in physics (especially those studying fluid mechanics or undertaking capstone projects), geology, environmental science, and engineering, the book supports courses in fluid mechanics, hydrology, and surface processes, and is well suited for capstone-level inquiry. Its clear and engaging approach also makes it accessible to scientifically literate general readers interested in understanding the science behind the natural world.Developed from materials used by the author in undergraduate physics and environmental science courses in Canada, the book reflects a classroom-tested approach that integrates conceptual clarity with practical observation, encouraging readers to see flowing water with new depth and precision.
