Freshwater management and governance are crucial for sustaining our water resources responsibly. It involves creating rules and plans to make sure clean water is available to everyone for drinking, agriculture and industry while safeguarding aquatic ecosystems. Governments, communities and businesses collaborate to manage water equitably and sustainably. They implement strategies for water conservation, wastewater treatment and pollution prevention. Through innovation and education, we develop efficient methods to use water wisely. Good freshwater management supports healthy ecosystems, ensures safe drinking water. It is vital for a sustainable future where water remains a reliable resource. By prioritising water conservation and adopting environmentally friendly practices, we can protect our freshwater sources for generations to come, while promoting human prosperity and ecological health. This book elucidates new techniques and their applications in a multidisciplinary approach. The topics covered in this extensive book deal with the core subjects of water resource management. As this field is emerging at a rapid pace, the contents of this book will help the readers understand the modern concepts and applications of the subject.