Can we calculate rainfall intensity with daily rainfall data? I have a set of 30 years daily precipitation data for two stations, will it be possible to create frequency-intensity-duration curve from this data?
Hello
The mean daily rainfall intensity (that is the monthly/seasonal/annual amount divided by frequency) is rather different than the instantaneous rain rate since the rainfall is usually intermittent at daily time scale. It is especially true in the tropics. So to compute an IDF, you need hourly data or even smaller timesteps. Vincent
You can calculate daily Rainfall intensity only from daily rainfall data. You can create daily intensity frequency curve from your data set..
Hello
The mean daily rainfall intensity (that is the monthly/seasonal/annual amount divided by frequency) is rather different than the instantaneous rain rate since the rainfall is usually intermittent at daily time scale. It is especially true in the tropics. So to compute an IDF, you need hourly data or even smaller timesteps. Vincent
Vincent
What he can do is frequency analysis of daily rainfall in the form of design values at different return periods. you are right in pointing out that mean rainfall rate is different than instantaneous rainfall rate....
Please see our paper 'Approximation and spatial regionalization of rainfall erosivity based on sparse data in a mountainous catchment of the Yangtze River in Central China' in Environmental Science and Pollution Research 01/2013; DOI:10.1007/s11356-012-1441-8
Nabajit,
My suggestion is that you download the paper by Beuchat et al (2011) in Water Resources Research, doi:10.1029/2010WR010342 and you will learn a lot about this general topic from the literature review it contains, in addition to the original contribution made by that paper. You may want to also download the literature references cited therein.
http://onlinelibrary.wiley.com/doi/10.1029/2010WR010342/abstract
Mariza
There are also many important papers by Patrick Willems (KU Leuven) and co-authors. You can look Willem's publications up here on ResearchGate.net
They include dozens of papers related to IDF curves for urban flooding applications.
Mariza
In my view to derive rainfall intensity one should have continuous rainfall data for 24 hours of period such as auto-graphic records. India meteorological department is having a huge data set of country. For better understanding you can calculate RF(mm) per minute.
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