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<br />COMPUTER PROGRAM PEAKFQ <br /> <br />The following sections describe the computer program PEAKFQ for performing the Bulletin 17B <br />flood-frequency analysis. Figure 3 shows the structure of the PEAKFQ program. <br /> <br />I <br />Input <br /> <br />I <br /> <br />Output <br /> <br />~ <br /> <br />File Options <br /> <br />Peakfq <br />I <br /> <br />I <br />Modify <br /> <br />I <br />Start <br /> <br /> <br /> <br />I <br />Wdm Keyboard ASCn <br /> <br />h <br /> <br />File Select <br /> <br />Options Skew Historic Low Base <br /> <br />Figure 3. Structure of the PEAKFQ program. <br /> <br />Examples of flood-frequency analyses using program PEAKFQ are provided for five stations: Fishkill <br />Creek at Beacon, N.Y. (fig. 4), Floyd River at James, Iowa (fig. 5), Back Creek at Jones Springs, W.Va. (fig. <br />6), Orestimba Creek near Newman, Calif. (fig. 7), and Sugar Creek at Crawfordsville, Ind. (fig. 8). The <br />Floyd River example illustrates the historic adjustment for a high outlier in the systematic record. The 1953 <br />annual peak flow (71,500 ft3is) is the highest known peak flow in at least 82 years. The Orestimba Creek <br />example illustrates the detection and adjustment for a low outlier and several zero flows. Both these <br />examples are discussed in Appendix 12 of Bulletin 17B (Interagency Advisory Committee on Water Data, <br />1982). <br /> <br />FIGURES 4, 5, 6, 7, AND 8 NEAR HERE <br /> <br />PEAKFQ <br /> <br />15 <br /> <br />DRAFT. 1/30/98 <br />