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<br />Another method is to specify the discharge and an assumed set of <br />On' values. and have the program compute a water surface profile which <br />can be compared with the high water profile. For this method WSElK may <br />be input on the X2 card, without entering the computations, so that it <br />can be easily compared with the computed water surface elevation on the <br />output. The variable FN (J2.6 card) may be utilized to vary the assumed <br />'n' values for multiple profile trials. <br /> <br />12. STORAGE-OUTFLOW DATA <br /> <br />Punched cards can be obtained from HEC-2 for stream routing by the <br />Modified Pu1s Method using program HEC-l. The cards punched are Y,2, <br />and 3 cards (see program description for HEC-1). This option can be <br />used only if multiple profiles are computed from the same cross sectional <br />data and if the summary printout is requested. Interpolated cross sec- <br />tions determined by the computer may be used. Routing reach sections <br />may not be interpolated sections. However. it may not be wise to use <br />interpolated cross sections since a different number of cross sections <br />might be interpolated between two given cross sections for different <br />magnitudes of discharge which could cause inconsistencies in the <br />incremental storage volumes. The ability to repeat the previous cross <br />section by using only an Xl card (i.e.. field two on the Xl card is <br />blank) can be use where additional cross sections are needed at the ends <br />of routing reaches and in place of the interpolated cross sections. <br />The J4 card calls for this option. <br /> <br />24 <br />