Uncertainty analysis of national weather service rainfall frequency atlas

Yeou-Koung Tung*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The rainfall-frequency atlas published by the National Weather Service (NWS) has been extensively used in the storm drainage structures design. The users of such maps should recognize the fact that these maps are the result of many processes involving smoothing, translation, and interpolation. Rainfall depths extracted from these publications can only be regarded as representative values associated with uncertainties. Quantification of the uncertainty associated with the rainfall isopluvial maps in the NWS Technical Paper Number 40 is made in this paper. The method applies first-order analysis in conjunction with Chen's general rainfall intensity-duration-frequency formula. Examples of performing point error analysis and developing error maps are given.

Original languageEnglish
Pages (from-to)179-189
Number of pages11
JournalJournal of Hydraulic Engineering
Issue number2
StatePublished - 1 Jan 1987


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