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Table 2 <br />~ "C" Factors for Permenant Pasture and Rangeland <br />(EPA, 1977) <br />Vegetative Canopy Cover That Contacts the Surface 1/ <br />Type and Height <br />of Raised Canopy 2/ <br />Canopy <br />Cover 3/ Type 4/ <br />Percent Ground Cover <br />No appreciable canopy <br />Canopy of tall forts <br />or short brush <br />(0.5 m fall h[J <br />Appreciable brash <br />or bmshes <br />(2 m faR htJ <br />Trees but no appreciable <br />low brush <br />~(4 m fall bt.) <br />0 10 20 40 60 80 95-100 <br /> G 1.0 .45 ~ .20 .10 .042 .013 .003 <br /> W 1.0 .45 .24 .15 .090 .043 .011 <br />25 G 1.0 .36 .17 .09 .038 .012 .003 <br /> W 1.0 .36 ~ .20 .13 .082 .041 .Oll <br />50 G 1.0 .26 .13 .07 .035 .O12 .003 <br /> W 1.0 .26 .16 .ll .075 .039 .011 <br />75 G 1.0 .17 .10 .06 .031 .011 ' .003 <br /> W ~ 1.0 .17 .12 .07 .067 .038 .011 <br />25 G 1.0 .40 .IS .09 .040 .013 .003 <br />~ W 1.0 .40 .22 .14 .085 .042 .011 <br />50 G LO .34 .16 .085 '.038 .012 .003 <br /> W 1.0 .34 .19 .13 ~ .081 .041 .011 <br />75 G 1.0 .28 .14 .OS .036 .012 .003 <br /> W 1.0 .28 .17 .l2 .077 .040 .Oll <br />25 G 1.0 .42 .19 ., .10 .041 .013 .003 <br /> W L0 .42 .23 ~ .14 .087 .042 .Oll <br />50 G 1.0 .39 .IS .09 .040 .013 .003 <br /> W 1.0 .39 .21 .14 .085 .042 .Oll <br />75 G 1.0 .36 .17 .09 .039 .O12 .003 <br />1/ All values shown assume:(1)randomdistributionofmulchorvegetation,and(2)mulchofappreciabledepthwhereitexists. <br />2/ Average fall height of waterdrops from canopy to soil surface: m=meters. <br />3/ Portion of total-area surface that would be hidden from view by canopy m a vertical projection, (a bird's-eye view). <br />4/ G: Cover.at surface is grass, grasslike plants, decaying compacted duff, or liver. <br />W: Cover at surface is mostly broadleaf herbaceous plants (as weeds with little lateral-toot network near the atrrface, and/or <br />'undecayed residue) <br />7 <br />