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<br />HEC-l INPUT DESCRIPTION <br />LOSS RATE DATA (L Cards) <br /> <br />FIELD VARIABLE <br /> <br />VALUE <br /> <br />10.2 LE CARD - BEC EXPONENTIAL LOSS RATE <br /> <br />DESCRIPTION <br /> <br />Col 1+2 ID <br /> <br />LE <br /> <br />1 <br /> <br />STRKR <br /> <br />+,0 <br /> <br />Card identification <br /> <br />Initial value of STRKR in inches/hour <br />(mm!hr) for HEC's exponential rain loss rate <br />function. If doing an optimization (OU <br />card), this variable will not be optimized <br />and will be fixed at this value. <br /> <br />. <br /> <br />. <br /> <br />-1 For optimization only (OU card previously <br />supplied), program assumes a starting value <br />and then optimizes. <br /> <br />2 <br /> <br />DLTKR <br /> <br />0,+ <br />or - <br /> <br />3 <br /> <br />RTIOL <br /> <br />0,+ <br />or - <br /> <br />4 <br /> <br />ERAIN <br /> <br />0,+ <br />or - <br /> <br />5 <br /> <br />RTIMP <br /> <br />+ <br /> <br />6-10 <br /> <br />For optimization only (OU card previously <br />supplied), program uses this (after sign <br />change) as the starting value for the <br />optimization. <br /> <br />DLTKR is the amount in inches (mm) of <br />initial accumulated RAIN loss during which <br />the loss coefficient is increased. See <br />Field 1 for meaning of value. <br /> <br />Rate of change of the rain loss-rate <br />parameter computed as the ratio of STRKR to <br />a value of STRKR after 10 inches (lOMM) of <br />accumulated loss. See field 1 for an <br />explanation of the values. <br /> <br />Exponent of precipitation for loss rate <br />function. See Field 1 for meaning of value. <br /> <br />Percent of subbasin which is impervious. <br />100 percent runoff will be computed for this <br />portion of the subbasin. <br /> <br />Specify loss rate variables similar to <br />Fields 1-5 above, for the second kinematic <br />subcatchment. UK card is used. No <br />optimization may be performed. <br /> <br />, <br /> <br />. <br /> <br />Page 38 <br />