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SECTION 5.3 DETENTION FACILITIES <br />Riser Overflow <br />The nomograph in Figure 5.3.4.H may be used to determine the head (in feet) above a riser of given <br />diameter and for a given flow (usually the I00-year peak flow for developed conditions). <br />7 <br />O <br />FIGURE 5.3.4.H RISER INFLOW CURVES <br />HEAD IN FEET (measured from crest of riser) 10 <br />Q, .,=9.739 DHM <br />Q„m,: 3.782 WHIM <br />Q In cfs, D and H in feel <br />Slope change occurs at weir•orinco transition <br />124122 005 5-48 2005 Surface Water Design Manual <br />/ I <br />