1. 1 Hayward Zone 4 Line A Watershed Modeling Item #2a-2

2. 2 Watershed Modeling Overview Phase IPhase IIPhase III WaterSedimentContaminants Hydrological Simulation Program FORTRAN (HSPF) Evaporation Item #2a-2

3. 3 Inputs: Land use data -provides % imperviousness Meteorological data -local precipitation and evaporation data Item #2a-2

4. 4 Output: Uncalibrated hydrograph Predicted Flow compared to Observed Flow Input: Oakland Foothills precipitation data Item #2a-2

5. 5 Next steps Add storm drains Calibrate hydrograph Model sediment Model contaminants (e.g. Hg, PCBs) Item #2a-2