This book provides a comprehensive exploration of how rapid urbanisation is reshaping waterscapes in the world&s urban deltas and what strategies are needed to ensure resilience and sustainability in these fragile environments. By combining conceptual insights, global case studies, and practical approaches, it examines the dynamic relationship between cities, water bodies, and deltaic ecosystems under the pressures of climate change, sea-level rise, and socio-economic transformation. The book highlights the urgent challenges that urban deltas face today-flooding, water pollution, ecosystem degradation, and social inequalities in water access-while showcasing adaptive pathways that can secure sustainable futures. It brings together interdisciplinary perspectives from urban planning, environmental science, water governance, engineering, and social studies to offer a holistic understanding of urban waterscapes. Particular emphasis is placed on the interconnectedness of ecological health, infrastructure, and human well-being, positioning deltas as critical laboratories for sustainable urbanisation. Key themes addressed include the historical evolution of deltaic cities, the governance of water bodies, the socio-ecological impacts of urban expansion, and the disproportionate vulnerabilities experienced by marginalised communities. The book also explores forward-looking strategies such as nature-based solutions, smart water technologies, climate-sensitive planning, and community-driven resilience frameworks. Drawing on case studies from diverse regions-including the Ganges-Brahmaputra, Mekong, Nile, Mississippi, and European deltas-it demonstrates both the risks of unchecked growth and the opportunities for innovative water-sensitive urban development. In tackling these issues, the book seeks to answer a pressing global question: how can cities thrive while living with water, rather than against it? The synthesis of theory, evidence, and practice presented here makes it not only an academic contribution but also a policy-relevant resource. This book will appeal to researchers, scholars, and graduate students in the fields of urban studies, environmental science, sustainability, geography, water management, and climate change adaptation. It will also be of great value to urban planners, policymakers, development practitioners, and NGOs working on sustainable urbanisation and delta resilience.