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<br />Do Reliability Applications <br />Procedures for computing confidence limits to the frequency curve are <br />provided along with those for calculating risk and for making expected prob- <br />ability adjustments. <br /> <br />E. Potpourri <br />This section provides information of interest but not essential to the <br />guide, including a discussion of non-conforming special situations, plotting <br />positions, and suggested future studies. <br /> <br />F. Appendix <br />The appendix provides a list of references, a glossary and list of <br />4Fymbols, tables of K values, the computational details for treating most <br />of the recommended procedures, information about how to obtain a computer <br />program for handling the statistical analysis and treatment of data, and a ~ <br />summary of the report ("Flood Flow Frequency Techniques") describing studies <br />made at the University of Texas which guided selection of some of the pro- <br />cedures proposedo <br /> <br />1110 Information to be Evaluated <br /> <br />When developing a flood flow frequency curve, the analyst should con- <br />sider all available information. The four general types of data which can <br />be included in the flood flow frequency analysis are described in the follow- <br />ing paragraphs. Specific applications are discussed in subsequent sections. <br /> <br />A. Systematic Records <br />Annual peak discharge information is observed systematically by many <br />Federal and state agencies and private enterprises. Most annual peak <br />records are obtained either from a continuous trace of river stages or from <br />periodic observations of a crest-stage gage. Crest-stage records may provide <br />information only on peaks above some preselected base. A major portion of <br />these data are available in U.S. Geological Survey (USGS) Water Supply <br />Papers and computer files, but additional <br /> <br />4 <br />