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<br />The decision about use of the expected probability adjustment is a <br />policy decision beyond the scope of this guide. It is most often used <br />in estimates of annual flood damages and in establishing design flood <br />criteria. <br />Appendix 11 provides procedures for computing the expected proba- <br />bility and further description of the concept. <br /> <br />VIr. Potpourri <br /> <br />The following sections provide information that is of interest but <br />not essential to use of this guide. <br /> <br />A. Non-conforming Special Situations <br />This guide describes the set of procedures recommended for defining <br />flood potential as expressed by a flood flow frequency curve. In the <br />Introduction the point is made that special situations may require other <br />approaches and that in those cases where the procedures of this guide <br />are not followed, deviations must be supported by appropriate study, <br />including a comparison of the results obtained with those obtained using <br />the recommended procedures. <br />It is not anticipated that many special situations warranting other <br />approaches will occur. Detailed and specific recommendations on analysis <br />are limited to treatment of the station data including records of historic <br />events. These procedures should be followed unless there are compelling <br />technical reasons for departing from the guide procedures. These devia- <br />tions are to be documented and supported by appropriate study, including <br />comparison of results. The Hydrology Committee of the Water Resources <br />Council asks that these situations be called to its attention for considera- <br />tion in future modifications of this guide. <br />The map of skew (Plate I) is a generalized estimate. Users are <br />encouraged to make detailed studies for their region of interest using <br />the procedures outlined in Section V.B.2. <br /> <br />23 <br />