Compute the NRCS 1-hour unit hydrograph for the North Branch Ralston Creek watershed (drainage area of 3.01 sq mi) assuming that the NRCS runoff curve number (CN) is 82 and that the average watershed slope is 7%.

1. Estimate the time of concentration (t_c) (in min) using the watershed lag method.
2. Compute the time to peak (t_p) (in min)
3. Compute the peak discharge (q_p) (in cfs)
4. Compute the NRCS 1-hour unit hydrograph for North Branch Ralston Creek