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<br />HEC-l INPUT DESCRIPTION <br />PRECIPITATION DATA (P Cards) <br /> <br />12 PRECIPITATION DATA (P Cards) <br /> <br />Precipitation data can be input as either precipitation gage data or <br />subbasin-average precipitation. <br /> <br />,. <br /> <br />A typical card sequence .for GAGE data is as follows: <br /> <br />ID <br />IT <br /> <br />.. <br /> <br />Etc., for job initialization <br /> <br />PG <br />PG <br />PG <br /> <br />Non-recording gage (total storm precipitation) <br />Non-recording gage (total storm precipitation), <br />etc. This is a recording gage if the PG card is <br />followed by PI or PC cards. <br /> <br />PI <br /> <br />( <br />( <br />( <br />( <br />( <br />( <br />( <br /> <br />KIt <br />SA <br />BF <br />PT <br />PW <br />PR <br />PW <br /> <br />Subbasin runoff computation <br /> <br />Specification of stations andweightings for ) <br />computation of the storm total precipitation ) <br />and its time pattern for this subbasin. If ) <br />recording stations are to be used in the. ) <br />computation of subbasin-average TOTAL ) <br />precipitation, their gage identification must ) <br />also be on the PT card. ) <br /> <br />L- <br />u- <br /> <br />KIt <br /> <br />Etc. <br /> <br />PG and PG + PI/PC card combinations can be included at any point in the <br />data deck following the IT card. It is usually convenient to,group them <br />together as a precipitation data bank before the first KK card. Different <br />storms can then be simulated by simply inserting different data banks, as <br />long as the gage identification and weightings are the same. <br /> <br />t <br /> <br />Continued <br /> <br />Page 46 <br />