Nature-based solutions in Island water management: A case study from Bozcaada (Türkiye)

Area of Science:

• Environmental Science
• Hydrology
• Ecology

Background:

• Mediterranean regions face seasonal water scarcity, exacerbated in small islands with fragile ecosystems.
• Nature-based Solutions (NbS) are recognized for water resource management, but their application in small islands is under-researched.
• This study addresses the intersection of ecological fragility and water scarcity on small islands.

Purpose of the Study:

• To investigate the potential of Nature-based Solutions (NbS), specifically rainwater harvesting, for sustainable water management on the small island of Bozcaada, Türkiye.
• To analyze watershed characteristics and identify optimal locations for rainwater storage ponds.
• To ensure ecological compatibility and support local biodiversity through NbS implementation.

Main Methods:

• Development of a high-resolution Digital Elevation Model (DEM) to delineate island watersheds and analyze water flow.
• Assessment of watershed water retention potential and suitability for rainwater storage.
• Inclusion of geological structure, soil type, and native biodiversity in site selection for ecological compatibility.

Main Results:

• Strategically placed rainwater ponds can enhance seasonal water availability.
• The proposed NbS approach reduces dependence on external water sources.
• Implementation supports groundwater recharge and preserves native species year-round.

Conclusions:

• Nature-based Solutions, particularly rainwater harvesting systems, offer a viable and sustainable water management strategy for small Mediterranean islands.
• The study provides a replicable framework for integrating ecological considerations into water resource management on islands.
• This approach promotes long-term resilience by addressing water scarcity and supporting biodiversity.