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<br />D. Reliability Applications <br />Procedures for computing confidence limits to the frequency curve <br />are provided along with those for calculating risk and for making expected <br />probability adjustments. <br /> <br />E. Potpourri <br />This section provides information of interest but not essential to <br />the guide, including a discussion of non-conforming special situations, <br />plotting positions, and suggested future studies. <br /> <br />F. Appendix <br />The appendix provides a list of references, a glossary and list of <br />symbols, tables of K values, the computational details for treating most <br />of the recommended procedures, a computer program for handling the <br />statistical analysis and treatment of data, and a summary of the report <br />("Flood Flow Frequency Techniques") describing studies made at the <br />University of Texas which guided selection of some of the procedures <br />proposed. <br /> <br />III. Information to be Evaluated <br /> <br />When developing a flood flow frequency curve, the analyst should <br />consider all available information. The four general types of data <br />which can be included in the flood flow frequency analysis are described <br />in the following paragraphs. Specific applications are discussed in <br />subsequent sections. <br /> <br />A. Systematic Records <br />Annual peak discharge information is observed systematically by <br />many Federal and state agencies and private enterprises. Most annual <br />peak records are obtained either from a continuous trace of river <br />stages or from periodic observations of a crest-stage gage. Crest-stage <br />records may provide information only on peaks above some preselected <br />base. A major portion of these data are available in U.S. Geological <br />Survey (USGS) Water Supply Papers and computer files, but additional <br /> <br />4 <br />