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., <br /> <br />"C" Factors for Permenant Pasture and Rangeland <br />(EPA, 1977) <br />Vegetative Canopy Cover That Contacts the Surface 1/ <br />Type and Height Canopy Pacmt Ground Cove <br />2/ Cover 3/ <br />of Raised Cano Type 4/ <br />py <br /> 0 10 20 40 60 80 95-I00 <br />No appraiable canopy G I.0 .45 .20 . f 0 .042 .013 .003 <br /> W 1.0 .45 .24 .IS .090 .043 .011 <br />Canopy of ullforbs 25 G 1.0 36 .17 .09 .038 .012 .003 <br />or shoot brush W 1.0 .36 .20 .13 .082 .041 .011 <br />(0.5 m fall ht.) 50 G 1.0 .26 .13 .07 .035 .OI2 .003 <br /> W 1.0 .26 .16 .Il .075 .039 .011 <br />75 G 1.0 .17 .10 .06 .031 .011 ' .003 <br /> W I.0 .I7 .12 .Q7 .067 .038 .Oll <br />Appreciable brush 25 G I.0 .40 .18 .09 .040 .013 .003 <br />a brushes - W 1.0 .40 .22 .l4 085 042 011 <br />. <br />(2 m fall ht.) 50 G I_0 .34 .16 .085 . <br />.038 . <br />.012 . <br />.003 <br /> W 1.0 .34 .19 .13 .081 .041 .Oll <br />75 G 1.0 .28 .14 .08 .036 .012 .003 <br /> W 1.0 .28 .17 .12 .077 .040 .011 <br />Trees but no appreciable 25 G I.0 .42 .l9 , .10 .041 .013 .003 <br />low brush W I.0 .42 .23 .14 .087 .042 .011 <br />(4 m fall ht.) 50 G <br />W 1.0 <br />I.0 .39 <br />.39 .I8 <br />.21 .09 <br />.14 .040 <br />.085 .013 <br />.042 .003 <br />.011 <br />111 75 G 1.0 .36 .17 .O9 .039 .012 .003 <br />f I All value shown assuraa (1) tartdom distribution of mulch or vegeutioa, and (2) mulch of approciable depth where it esists. <br />2/ Average fall hright of waterdcops from canopy to soil surface: m=meters. <br />3/ Portion of tool-area surface that would be hidden ftam view by campy in a vertical projection , (s bicd' stye view). <br />4/ G: Cover at surface is grass, gruslike plants, dxaying compacted duff, or litre. <br />W: Cover at surface is trtostly broadleaf herbacoous plants (u woods with little lateral-coot network near the surface, and/or <br />'undecayed residue.) <br />• <br />M-izF <br />7f~o/93 <br />