Integrating satellite remote sensing into the standard operating procedure of a water utility

Abstract

This study explores the feasibility and benefits of incorporating Satellite Remote Sensing Techniques (SRST) into drinking water supply companies' processes for monitoring large reservoirs' surface water quality. Focusing on Thessaloniki Water Supply & Sewerage Co S.A. (EYATH SA), the study examines an unexpected event in the Polyphytos reservoir detected by satellite-based instruments. Images from Sentinel-2 and Landsat 8-9 were analyzed using algorithms such as Se2WaQ and Oil-index to estimate water quality parameters. The potential of the under-development Water Quality Emergency Monitoring Service (WQeMS) for real-time monitoring and early warning was also assessed. A strategic plan for integrating satellite tools in surface water quality monitoring processes is presented, demonstrating several advantages, such as detecting unexpected events, continuous monitoring, and cost-effectiveness. This study emphasizes the potential benefits of integrating SRST into water utilities' processes for large reservoirs' surface water quality monitoring and suggests a useful workflow for similar applications.