Question

The city of Savannah is proposing to build a small baseball field on a 9.94 ha pasture site. A drainage is needed to prevent flooding in this field during high precipitation events. A culvert is proposed as the most effective drainage structure. The city requires that culverts should be designed using a 5-year return period. From the topographic data of the site, the overland flow distance is estimated to be 450 meters, the slope of the pasture is estimated to be 2%, and the runoff coefficient is estimated to be 0.20. Using the provided IDF curves (supplemental test info.), estimate the peak flow capacity to be drained by the proposed culvert in m^3/s.

Answer 1

I found intensity from this attached graph