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Hydrology Journal
Year : 2009, Volume : 32, Issue : 1&2
First page : ( 59) Last page : ( 75)
Print ISSN : 0971-569X.

Development of Intensity Duration Frequency Relationship for Short Duration Rainfall

Ramana R. Venkata, Scientists, Chakravorty B., Scientists, Pandey N.G., Scientists, Mani P., Scientists

CFMS, NIH, Phulwarishrif, Patna -801 505.

Abstract

The rainfall Intensity Duration Frequency (IDF) relationship is one of the most commonly used tools in water resources engineering for planning, designing and operation of water resources projects. In the present paper rainfall data of 14 raingauge stations of Punpun basin located in Bihar was used for regional rainfall frequency analysis based on L-moment approach facilitated to find the robust distribution for these daily raingauge stations having data availability of 9–17 years. The robust distribution was used to find the IDF relationship and curves for short duration rainfall for Punpun basin. From the IDF curves parameters of empirical equations for the gauged locations were determined and contour maps were generated. IDF curves for ungauged locations were developed form the generated contour maps using GIS and finally a generalized IDF curve incorporating return period and the duration of rainfall for particular a station was developed.

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Key words

L-moment, rainfall, contour, intensity, duration, frequency, parameter, gauged, ungauged.

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