1. Precipitation

2. Infiltrating

3. Filling small depression storage

4. Depressions filled, overland flow

5. Concentrating into small channels

6. Concentrating flow into larger channels

8. Change in flow through time (video 1)

9. Change in flow through time (video 2)

10. SCS Runoff Curve Numbers for Selected Land Uses (Bedient and Huber, 2002) Soil Group Types ASandy, well drained BSandy loam CClay loam; shallow sandy loam DPoorly drained; Heavy plastic clay; Swells when wet

11. Estimate the Curve Number and Lag Time for flow off the Lundstrum Park/Hillcrest Neighborhood 147.7 acres Lundstrum Park - 18.4 acres Hillcrest Elementary – 3 acres 4 houses per acre

12. Use StreamStats to identify catchment area and flow path Distance = 3,265 ft Elevation drop = 80 ft http://water.usgs.gov/osw/streamstats/utah.html

13. SCS Rainfall Curves for different regions of the U.S.

14. NRCS Dimensionless unit hydrograph (Type II) t/T R q/q p 0.00.000 0.20.100 0.40.310 0.60.660 0.80.930 1.01.000 1.20.930 1.40.780 1.60.560 1.80.390 2.00.280 2.20.207 2.40.147 2.60.107 2.80.077 3.00.055 3.20.040 3.40.029 3.60.021 3.80.015 4.00.011 4.20.008 4.40.006 4.60.004 4.80.002 5.00.000 t/T R

15. Convoluted SCS unit hydrographs for 6-hr duration event