"The title of this journal is the offspring of the interdisciplinary research movement Delta Urbanism that started about 25 years ago at Delft University of Technology. The two words describe the concept that brings focus on an integrative and interdisciplinary approach in the planning, designing and engineering of urbanized deltas –fragile and highly dynamic landscapes at sea, in deltas, and in estuaries– facing extreme challenges from competing claims and interests. As discourse, it investigates the possibilities to combine flood protection, water management, and environmental regeneration with urban design, landscape architecture, and spatial planning. Finally, as practice, it has the objective to project the interdependency between spatial and infrastructural form and function and socio-ecological value and performance in deltaic and coastal landscapes."