This book seeks to showcase the ongoing challenges of water resource and its management through innovative and cutting-edge approaches (flooding and droughts and their respective impacts; spatial and urban planning; early warning systems; estimation of losses; water resource in the age of global climate change; risk communication; meteorology; integrated analysis; risk mitigation; infrastructures; nature-based management; watershed management; transport; legal assessment; vulnerability analysis; public participation; or case studies). In the face of current global changes, the availability and quality of water resources are under severe threat. Indeed, in all sectors related to water resource management, sustainable development is important for present and future generations. Indeed, multiple problems such as water shortage or flooding, as well as environmental pollution phenomena, are observed. This situation is further exacerbated by poor management practices and unsustainable extraction of water for various consumptive uses. Consequently, many regions around the world, particularly urban areas, are becoming water stressed and conflicts over access to water are becoming ever more common. To overcome the significant challenges fundamental to the management of water resources, cutting-edge knowledge, innovative approaches, and an in-depth understanding of the inherent scientific, economic, social, and environmental issues are imperative. Therefore, water resource management requires a clear understanding of the ongoing challenges and innovative approaches. The authors and editors believe that this book provides huge knowledge and data in the fields of water resource management, earth environmental sciences, humanities, and social sciences, which target a diverse range of readers, such as academics, scientists, students, environmentalists, meteorologists, urban planners, remote sensing, and GIS experts.