From the WATFLOOD web site; "WATFLOOD is a distributed hydrological model suitable for both flood forecasting and streamflow modeling."
From the Kenue web site; "Green Kenue (formerly EnSim Hydrologic) is an advanced data preparation, analysis, and visualization tool for hydrologic modellers. It provides a state-of-the-art interface, integrating environmental databases and geospatial data with model input and results data. Green Kenue provides complete pre- and post-processing for the WATFLOOD and HBV-EC hydrologic models. Also included is a 1D 'reach scale' unsteady hydrodynamic flow solver, Gen1D."
Development of WATFLOOD began in 1975 and has been continuing in the Department of Civil Engineering at the University of Waterloo.