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<br />e <br /> <br />The rainfall time-intensity pattern is determined next. Rainfall depth <br />can be plotted as a function of duration on log-log graph paper. If a line <br />is drawn through the points, the plot can then be used to determine <br />accumulated rainfall depths for any desired interval, 'The accumulated <br />rainfall is divided into increments to determine the amount in each period, <br />The rainfall values are then ranked by magnitude to produce a rainfall <br />distribution, The following order is most commonly used: the greatest <br />rainfall increment is usually placed in the center of the distribution, the <br />next largest is placed in front of it, and the next behind. For succeeding <br />values, the next largest is placed in front, the next behind, and so forth, <br />A storm distribution of this type is shown in Figure 4.3. Other <br />distributions can also be employed, It may be desirable in some cases to <br />analyze actual storm distributions to develop a representative storm pattern <br />for a given region, <br /> <br /> 1.0 <br />e 0.. <br />"--' 0,8 <br /> 0,7 <br /> . 0,6 2,-Veor Return Period <br /> . 24-Hour Durallon <br /> ~ <br /> ~ 1- Hour Interval <br /> .~ 0,5 <br /> .J <br /> .J <br /> il! <br /> z 0.4 <br /> :c <br /> '" <br /> 0.3 <br /> 0.2 <br /> 0.\ <br /> 0 0 6 12 <br />. 18 24 <br />I <br /> TIME, In houn <br /> <br />e <br /> <br /> <br /> <br />4,3, Typical Time Distribution of Storm Rainfall <br /> <br />23 <br />