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Cy H <br />CO <br />y3 <br />H xl <br />"Ci1 H �'ti <br />C H <br />fxxi <br />Cj7 O <br />H30 <br />CH <br />4]Y o <br />9z9y� <br />rHH <br />�CA <br />H <br />c) ty rn <br />HOrn <br />Japanese Gulch Basin: <br />The allowable release rate is QA = 1.25 CFS. A four stage release structure will be used. <br />Orifices will be numbered from lowest to highest. <br />Q = 0.62 a 2gh Orifice release equation. <br />Q = release rate <br />a = area of orifice <br />g = gravity coefficient <br />h = head on orifice <br />Qsizing = QA/4 <br />Qsizing = 1.25/4 = 0.313 CFS <br />Orifice #1 <br />Qsizing = 0.313 <br />Head = 565.10 - 561.02 = 4.08 <br />+�wd 0.313 = 0.62 a 2(32.2)(4.08) <br />a = 0.0311 SF <br />rah D 4a = (41(0,0311) = 0.199 = 2.39IN <br />Tr <br />a. <br />U <br />i <br />Use shop drilled orifice diameter of 2 318" <br />Orifice #2 <br />Qsizing = 0.313 CFS <br />Head = 565.10 - 562.02 = 3.08 <br />0.313 = 0.62 a , (2)(32.2)(3.08) <br />a = 0.0358 SF <br />D = fj(4 0.035 <br />n <br />= 0.214 = 2.56 IN <br />Use shop drilled orifice diameter of 2 1 /2" <br />8488.03/1310 <br />