Studying Water Quality Impacts of Large-Scale Floating Structures: Insights from Floating Projects

Abstract

Floating projects have emerged in the last two decades as a climate resilient solution to address land scarcity in urban areas, offering opportunities for energy, food production, and living environments. However, these projects may significantly influence various aspects of water bodies, with potential positive or negative effects that are not yet completely understood. In the Netherlands, water quality research on smaller-scale floating projects has been conducted and well documented in recent years. This study provides an overview of various studies that were done in the past decade in the Netherlands, where critical water quality parameters beneath the floating projects were compared with reference conditions in open water for multiple floating housing and floating solar projects. Preliminary findings suggest minimal differences in water quality parameters, with slight decreases in dissolved oxygen concentrations and temperatures. Biofouling layers and ecosystems develop rapidly after construction, indicating potential for ecosystem restoration and biodiversity enhancement. These results may not be universally applicable to other water system types or floating platform sizes and shapes. Innovative monitoring strategies and tools were also implemented (e.g. underwater drones). Furthermore, the article describes the limitations of current studies for the scaling-up of floating solutions and describes how a new research initiative from the Netherlands “Floating Future’ will address this knowledge gap. This research project aims to further investigate this topic, optimizing the scale of large-scale floating infrastructure in alignment with receiving system characteristics. Additionally, methods for optimizing below- and above-water designs will be developed to maximize ecological benefits and meet engineering demands.