Water for Nature & Ecology

This Chapter explores the fundamental theme of water design for urban nature and ecology, establishing the critical foundation for sustainable urban futures through natural ecological urban networks that integrate Blue-Green Infrastructure (BGI) for holistic urban water management. The approach combines the hydrological functions of water systems (blue) with vegetation networks (green) to provide practical solutions to contemporary climate change challenges. Within the context of water-oriented urban design, the Chapter demonstrates how professionals and designers are suggested to prioritise space allocation for fragile urban ecological land from the initial phases of project development, moving beyond conventional sectoral approaches towards integrated territorial planning that recognises water as a fundamental organising principle. The theoretical framework synthesises Nature-based Solutions (NbS), Blue-Green Infrastructure theory (BGI), and Biophilic design principles to demonstrate how water-sensitive approaches can systematically transform urban environments from ecological liabilities into regenerative systems. As shown through the Water-oriented Design (WoD) model established in the previous Chapter, water serves as the central element of regional development, with particular emphasis placed on the protection of sensitive water systems through the systematic application of sustainability-based criteria frameworks. This approach fosters the integration of Water-Sensitive Design principles into overarching regional planning frameworks, thereby facilitating the attainment of coordinated, resilient, sustainable urban and rural development that addresses the technical, social, and environmental dimensions simultaneously. The examination of diverse case studies—from coastal mangrove restoration to freshwater confluence management, and from rural floodplain resilience to urban development-conservation integration—reveals both the adaptability and consistency of framework applications across varying ecological baselines, target species requirements, and governance contexts while maintaining coherent application of water-oriented design principles. The fundamental understanding is established that effective water-ecological design requires transitioning from human-centric approaches to nature-driven paradigms that recognise the intrinsic capacity of natural systems as catalysts for sustainable urban development. This paradigmatic shift necessitates systematic integration of theoretical frameworks that bridge traditional disciplinary boundaries while fostering diverse ecosystem mechanisms within urban environments.