A decision support system (DSS) will be developed, using the results of the MRB model system and other existing watershed DSSs to enable decision-making about investments in watershed management, aquatic ecosystem restoration, water quality, water quantity, and groundwater management measures in the MRB. The DSS will be explicitly designed to meet sponsor needs. The DSS will be linked to the Basin GIS to enable visualization of the spatial arrangement of management measures. The DSS will incorporate incremental analysis techniques to identify the best value sequence of management measures to apply within each major watershed to achieve target future.