In partnership with Tottori University Hydronumerics provided a Decision Support System (DSS) for the recently completed Tono Dam in Tottori prefecture, Japan. The system integrates data from a SCADA network, an automatic profiler and a lake meteorological station and applies numerical models to hindcast and forecast reservoir water quality. The system is configured to predict the fate of large turbid inflows and forecast potential algal blooms. In a recent upgrade Hydronumerics developed a warning system and multiple scenario forecasting tools to improve operational efficiency.