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C_~ <br />Vegetative Canopy Cover that contacts the Surface <br />Type and Height Canopy <br />of Raised Canopy 2/ Cover 3/ Type 4/ Percenc Ground Cover <br />X- - --- 0 20 - 40 60 80 95-1~ <br />Column No.: 2 3 4 5 6 7 8 9 <br />No appreciable canopy G _ .45 .20 .10 <br />x .042 .013 ' .003 <br /> W .45 .24 .15 .090 .043 .011 <br />Canopy of tall (orbs 25 ~ .36 ~.17. '~.09 ,.038 .0 L2 .003 <br />or short brush -' W .36 .20 ~ .13 .08Z .041 .011 <br />(0.5 m fall ht.) 50 G. .26 .13 .07 . .035 .012 .003 <br /> W .26 .16 <br />_. .11 __ <br />.._ .. .075 .039 .011 <br /> 75 G .17 .10 .06 .031 .011 .003 <br /> W .17 .12 .07 .067 .038 .011 <br />Appreciable brush 25 G .40 .18 .09 .040 .013 .003 <br />or brushes W .40 .22 .14 .085 .042 .011 <br />(2 m fall ht.) 50 G .34 .16 .085 .038 .012 .003 <br /> W. .34 .19 .13 .081 .041 .011 <br /> 75 G .28 .14 .08 .036 .012 .003 <br /> W :28 .17 .12 .077 .040 .011 <br />. Trees but no appre- 25 G .42 .19 .10 .041 .413 .003 <br />ciable low brush W .42 .23 .14 .087 .042 .011 <br />(4 m fall ht.) 50 G .39 .18 .09 .040 .013 .003 <br />W .39 .21 .14 .085 .042 .011 <br />75 G .36 .17 .09 .039 .012 .003 <br />W .36 .20 .13 .083 .041 .011 <br />1 All values shown assume: (1) random distribution of mulch or vegetation, and (2) <br />mulch of appreciable depth where it exists. <br />2/ Average fall height of waterdrops from canopy to soil surface: m = meters. <br />3/ Portion of total-area surface that would be'•hiddea.from .view~by•canopy in a <br />vertical projection, (a bird's-eye view). <br />4/ G: Cover at surface is glass, grasslike plants, decaying compacted duff, or <br />litter. <br />W: Cover at surface is mostly broadleaf herbaceous plants (as weeds with little <br />lateral-root network near the surface, sad/or undecayed residue.) <br />Table 1. "C" Factors for Permanent Pasture and Rangeland <br />(from USDA Agronomy Note N 50) <br /> <br />-9- <br />