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<br />,- <br /> <br />HEC-l INPUT DESCRIPTION <br />LOSS RATE DATA (L Cards) <br /> <br />10.4 LS CARD - SCS CURVE NUMBER LOSS RATE <br /> <br />FIELD VARIABLE <br /> <br />VALUE <br /> <br />Col 1+2 ID <br /> <br />LS <br /> <br />1 <br /> <br />STRTL <br /> <br />+ <br /> <br />DESCRIPTION <br /> <br />Card identification. <br /> <br />. <br /> <br />Initial rainfall abstraction in inches (mm) <br />for snow free ground. For an optimization <br />job (OU card) this variable is fixed at the <br />given value. <br /> <br />~ <br /> <br />o Initial abstraction will be computed as <br />0.2* (lOOO-lO*CRVNBR)/CRVNBR. For an <br />optimization job, initial abstraction will <br />vary with CRVNBR, <br /> <br />-1 <br /> <br />2 <br /> <br />CRVNBR <br /> <br />0,+ <br /> <br />3 <br /> <br />RTIMP <br /> <br />+ <br /> <br />4-6 <br /> <br />For optimization only (OU <br />supplied), program will <br />value and then optimize. <br /> <br />card previously <br />assume a starting <br /> <br />Same as (-1) above but program <br />value after sign change) as <br />point for the optimization. <br /> <br />uses this <br />the starting <br /> <br />SCS curve number for rainfall/snomelt <br />losses on on snow-free ground. If this is <br />an optimization job (OU card supplied), this <br />variable will be fixed at this value and not <br />optimized. <br /> <br />Same as (-1) above but program <br />value (after sign change) as <br />point for the optimization. <br /> <br />uses this <br />the starting <br /> <br />Percent of drainaqe basin that is <br />impervious. No losses are computed for this <br />portion of the basin. <br /> <br />Specify loss rate variables similar -to <br />Eields 1-3 for second kinematic subcatchment <br />if used. <br /> <br />" <br /> <br />Page 40 <br />