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<br />DRAFT <br /> <br />TABLE 2.5 - 24-HOUR RAINFALL POINT RAINFALL VOLUMES <br /> <br />LOCATION <br /> <br />RAINFALL VOWME (INCHES) <br />2-YR 5-YR 10-YR 25-YR 50-YR 100-YR <br /> <br />Valley <br />Mountains <br /> <br />1.20 1.60 <br />1.33 1.77 <br /> <br />1.80 <br />1.99 <br /> <br />2.20 <br />2.44 <br /> <br />2.60 <br />2.88 <br /> <br />2.80 <br />3.10 <br /> <br />The rainfall intensities for the 24-hour period were developed <br />utilizing the SCS Type-II storm distribution McCuen, 1982. The <br />storm was divided into 15 minute increments. The storm <br />distribution is listed in Table 2.6. The values were adjusted <br />slightly to coincide with rainfall volumes for specific time <br />intervals from NOAA (1973). For large areas, the point volumes are <br />multiplied by and area reduction factor. Only the French Creek <br />basin was large enough to require such a factor. The area <br />reduction factor for the French Creek basin was 0.97. <br /> <br />12 <br />