Construct the 100-yr, 24-hr synthetic design hyetograph using Eq. (9-2) and 1-hr time intervals. Center the maximum intensity (the 1-hr intensity) at hr 12; the. next highest intensity (determined by the depth from 2 hr-1 hr over the 1-hr interval-hence, intensity) at hr 11; the. next-highest intensity (depth from 3 hr 2 hr) at hr 13; the next-highest intensity (depth from 4 hr 3 hr) at hr 10; and back and forth similarly. Check the total volume under the hyetograph and see that it matches the total rainfall depth.