CalSim Model Development and Application

The California Department of Water Resources is seeking qualified firms to provide engineering and software development services for the CalSim suite of water‑resources modeling tools. The work is organized into four Specific Areas of Development, each potentially awarded to a separate contractor, and includes development, enhancement, calibration, documentation, and training for CalSim 3, CalLite, CalSimHydro, CS3RimInflow, CS3HIST, and associated simulation engines (WRIMS, IWFM). The contract will be a three‑year base period with possible one‑year extensions, and the total estimated value across all awards ranges from $1 M to $10 M. • Develop new capabilities, improve code performance, and support operational modeling for the State Water Project and Central Valley Project. • Calibrate and validate hydrology and groundwater models, produce data sets, and deliver technical documentation and training tools. • Provide on‑demand modeling support, participate in Model Technical Team meetings, and meet extensive reporting, insurance, and compliance requirements.