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<br />DRAINAGE CRITERIA MANUAL <br /> <br />RUNOFF <br /> <br />. <br /> <br />"' <br />- <br />d~ <br />-I" <br />.>.-::: 8 <br />~ <br /> II <br /> ll.. <br /> 6 <br /> a: <br /> w <br /> ~ <br /> w <br /> 2! <br /> < <br /> a: <br />. ~ 4 <br /> c.? <br /> Z <br /> ~ <br /> < <br /> W <br /> Q. <br /> 2 <br /> <br />12 <br /> <br />EQUATIONS OF CURVE: /" <br /> P = aI2 + bI. + C V <br /> . / <br />Eqn. a b C / <br />1 +.002450 -.0120 + 2.16 / <br />2 .00091 +.228 - 2.06 / <br /> / <br /> / <br /> / <br /> / . <br /> / <br /> / <br />.- ,/' <br /> Eqn. No.1 Eqn. No.2 <br /> <br />10 <br /> <br />o <br /> <br />o <br /> <br />20 40 60 80 <br />PERCENT IMPERVIOUS - I. <br /> <br />100 <br /> <br />FIGURE 4 - 3. <br /> <br />RELATIONSHIP BETWEEN PEAKING <br />PARAMETER AND IMPERVIOUSNESS <br /> <br />. <br /> <br />5~1-84 <br /> <br />URBAN DRAINAGE & FLOOD CONTROL DISTRICT <br />