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• <br />Vegetative Canopy Cover that contacts the Surface <br />Type and Height Canopy <br />of Raised Canopy 2/ Cover 3/ Type 4/ Percent Ground Cover <br />_ - y - - -- - - - 0 20 - 40'­ "60 89 95 -1=eO= <br />Column No.: <br />2 <br />3 <br />4 <br />5 <br />6 <br />7 <br />8 <br />9 <br />No appreciable canopy <br />brushes <br />G <br />.45 <br />.20 <br />.10 <br />.042 <br />.013 ' <br />.003 <br />.011 <br />(2 <br />W <br />.45 <br />.24 <br />.15 <br />.090 <br />.043 <br />.011 <br />Canopy of tall forbs <br />25 <br />G <br />.36 <br />.17, <br />x .09 <br />,.038 <br />.OL2 <br />.003 <br />or short brush <br />- <br />W <br />.36 <br />.20 <br />-..13 <br />.082 <br />.041 <br />.011 <br />(0.5 m fall ht.) <br />50 <br />G. <br />.26 <br />.13 <br />.07 <br />.035 <br />.012 <br />.003 <br />.17 <br />.12 <br />W <br />.26 <br />.16 _ <br />. 11 <br />- <br />--.075 <br />.039 <br />.011 <br />.19 <br />75 <br />G <br />.17 <br />.10 <br />.06 <br />.031 <br />.011 <br />.003 <br />.23 <br />.14 <br />W <br />.17 <br />.12 <br />.07 <br />.067 <br />.038 <br />.011 <br />Appreciable brush <br />25 <br />G <br />.40 <br />.18 <br />.09 <br />.040 <br />.013 <br />.003 <br />or <br />brushes <br />W <br />.40 <br />.22 <br />.14 <br />.085 <br />.042 <br />.011 <br />(2 <br />m fall ht.) <br />50 <br />G <br />.34 <br />.16 <br />.085 <br />.038 <br />.012 <br />.003 <br />W <br />.34 <br />.19 <br />.13 <br />.081 <br />.041 <br />.011 <br />75 <br />G <br />.28 <br />.14 <br />.08 <br />.036 <br />.012 <br />.003 <br />'W <br />:28 <br />.17 <br />.12 <br />.077 <br />.040 <br />.011 <br />• Trees but no appre- <br />25 <br />G <br />.42 <br />.19 <br />.10 <br />.041 <br />.013 <br />.00' <br />ciable low brush <br />W <br />.42 <br />.23 <br />.14 <br />.087 <br />.04.2 <br />.011 <br />(4 <br />m fall ht.) <br />50 <br />G <br />.39 <br />.18 <br />.09 <br />.040 <br />.013 <br />.003 <br />W <br />.39 <br />.21 <br />.14 <br />.085 <br />.042 <br />.011 <br />75 <br />G <br />.36"'°x° .17 ` <br />:09 <br />.0 <br />.012 <br />.003 <br />W <br />.36 <br />.20 <br />.13 <br />.083 <br />.041 <br />.011 <br />1 <br />All values shown assume: (1) random distribution <br />of mulch <br />or <br />vegetation, <br />and (2) <br />mulch of appreciable <br />depth where it <br />exists. <br />2/ <br />Average fall height <br />of waterdrops <br />from canopy <br />to soil <br />surface: <br />m = <br />meters. <br />3 / <br />Portion of total -area surface that <br />would be- hidden. <br />from.view <br />canopy in <br />a <br />vertical projection, <br />(a, bird's -eye <br />view). <br />4/ G: Cover at surface is grass, 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, and /or undecayed residue.) <br />Table 1. "C" Factors for Permanent Pasture and Rangeland <br />(from USDA Agronomy Note # 50) <br />-9- <br />