RainIDF, a software tool for derivation of rainfall intensity–duration–frequency (IDF) relationship is developed as an Excel add-in by using Visual Basics for Applications (VBA). The tool is integrated with two of the most widely used statistical distributions for determination of IDF relationship: the generalized extreme value (GEV) distribution for annual maxima series, and the generalized Pareto (GPA) distribution for partial duration series (PDS). It provides automated distribution fitting for rainfall data in the form of annual maxima or PDS for multiple intervals, solving and plotting of rainfall IDF curves. RainIDF uses the Solver add-in function in Excel to solve the coefficients of the empirical IDF formula in one step. The methodology built into RainIDF is discussed and rainfall IDF relationships for several stations in Peninsular Malaysia are derived and compared. RainIDF is available for download on GitHub (http://github.com/kbchang/rainidf) as an Excel add-in.
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Research Article|
March 01 2013
RainIDF: automated derivation of rainfall intensity–duration–frequency relationship from annual maxima and partial duration series
Kian Boon Chang;
Kian Boon Chang
1Department of Civil Engineering, Faculty of Engineering Building, University of Malaya, 50603 Kuala Lumpur, Malaysia
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Sai Hin Lai;
1Department of Civil Engineering, Faculty of Engineering Building, University of Malaya, 50603 Kuala Lumpur, Malaysia
E-mail: [email protected]
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Othman Faridah
Othman Faridah
1Department of Civil Engineering, Faculty of Engineering Building, University of Malaya, 50603 Kuala Lumpur, Malaysia
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Journal of Hydroinformatics (2013) 15 (4): 1224–1233.
Article history
Received:
November 01 2012
Accepted:
January 27 2013
Citation
Kian Boon Chang, Sai Hin Lai, Othman Faridah; RainIDF: automated derivation of rainfall intensity–duration–frequency relationship from annual maxima and partial duration series. Journal of Hydroinformatics 1 October 2013; 15 (4): 1224–1233. doi: https://doi.org/10.2166/hydro.2013.192
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