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<br />11 <br /> <br />HEC-1 INPUT DESCRIPTION <br />INTRODUCTION <br /> <br />1 INTRODUCTION <br /> <br />1.1 ORGANIZATION OF THIS INPUT DESCRIPTION <br /> <br />. <br /> <br />This input description is organized into three major types of data: <br />1) job description and initialization data, 2) hydrograph calculation <br />data, and 3) economic analysis data. This corresponds to the general <br />sequence of data necessary to build the digital model of a river basin as <br />described in the next subsection on Input Data Structure. <br /> <br />~ <br /> <br />The first group, JOB DESCRIPTION AND INITIALIZATION DATA, begins with <br />the I cards and goes through the V cards. The 10 and IT cards are <br />required and are described first. The other cards are optional and are <br />described in a recommended input sequence, i.e., I, J, 0, V cards as <br />desired. <br /> <br />The second group, HYDROGRAPH CALCULATION DATA, comprises all of the <br />data necessary to simulate the various river basin processes. The input <br />data in this group are organized ALPHABETICALLY, beginning with the B <br />cards and ending with the W cards. The required and recommended order to <br />input these data are described in the next subsection, Input Data <br />Structure. <br /> <br />The third group, ECONOMIC ANALYSIS DATA, consists of data to be <br />supplied after all of the hydrologic and hydraulic calculations are <br />completed. These data are optional and begin with the EC card and are <br />organized in the recommended sequence of input. <br /> <br />The last card described is the REQUIRED ZZ CARD to end the job. <br /> <br />. <br /> <br />..' <br /> <br />Page 1 <br />