The Operational Systems of SASWE Research Group website is an online application and decision-support resource showcasing the operational tools and modelling systems developed by the SASWE Research Group at the University of Washington. It features a portfolio of satellite-based operational systems and decision support platforms designed for water resources assessment, reservoir and dam management, river basin forecasting, irrigation advisory, and hydrological monitoring. Examples include the Global Reservoir Assessment Tool (RAT), Nile Basin Reservoir Advisory System (NiBRAS), Intelligent Dam Decisions and Assessment system (i-DDEA), South Asian Surface Water Modelling System (SASWMS), flood forecasting and early warning systems, and various country-specific monitoring and advisory tools. The resource provides descriptions, access points, and links for tools that apply Earth observation and advanced modelling to support real-world water management decision making.