With HydroCAD-10, local rainfall data from NOAA, NRCC, and other sources can be used to define rainfall events, create IDF files, and generate synthetic rainfall distributions. Users can import rainfall data from TR-20 file, or use expanded rainfall library and event lookup table. Added outlet devices include tubes and siphons, float-activated valves, skimmers, and progressive dam breach starting at specified time or WSE. In addition, watershed data can be imported and exported to CSV format.