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<br />;. <br /> <br />General Procedure <br /> <br /> <br />The procedure for hazard determination consists of the following steps: <br /> <br /> <br />1. Compute the peak discharge hydrograph at the dam site due <br /> <br /> <br />to failure of the dam. The peak of the hydrograph is <br /> <br /> <br />designated "Qp" and assumed to be of triangular shap,e. <br /> <br /> <br />Z. Route the peak discharge hydrograph downstream to a <br /> <br /> <br />section(s) of the stream where damage due to flooding is <br /> <br /> <br />anticipated ("critical section"). The peak of the routed <br /> <br /> <br />hydrograph at the critical sec:tion(s) is designated "Qr". <br /> <br /> <br />3. Calculate the depth and velocity of flow at the "critical <br /> <br /> <br />section(s)" for Qr and the physical characteristics of the <br /> <br /> <br />channel cross-section, <br /> <br />4, Assign the hazard rating to the dam based upon established <br /> <br /> <br />criteria (discussed later). <br /> <br /> <br />While each of these steps is subsequently discussed in detail, the reader must <br /> <br /> <br />be aware that use of en!;ineering judgement is very important. The application <br /> <br /> <br />of this procedure is explained through an example included in the text. <br /> <br />3 <br />