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Use of NRCS Win TR-20 for Development of NOAA Atlas 14-Based Design Rainfall Depths and Distributions in Pennsylvania

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2010 Pittsburgh, Pennsylvania, June 20 - June 23, 2010  1008803.(doi:10.13031/2013.29729)
Authors:   Geoffrey A Cerrelli
Keywords:   rainfall hydrology, NOAA Atlas 14, design rainfall amount, design rainfall distribution.

Since the release of the National Weather Service Technical Paper No.40 (TP-40) in May 1960, the USDA-Natural Resources Conservation Service (NRCS) has relied on this as their primary reference to establish design rainfall depths for various probability storms. The standard NRCS Type II design rainfall distribution is most widely used across the USA. Developed using the TP-40 data, it is coupled with the rainfall volumes and is used with predictive hydrology models to size conservation practices for agricultural applications. This same procedure is also largely accepted for use in analysis of stormwater management practices.

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