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All Topics | Topic "how to find probable rain wall from past data (PMP)"
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Author Message
ulageswaran kishokumar

Subject: how to find probable rain wall from past data (PMP)   
Posted: 5/21/2015 Viewed: 7166 times
Dear All,

i have a 50 years rainfall data, i would like know a proper method to find the maximum probable rainfal. Past data verying randomly, there is no uniform variation in a perticular month in each year.
Devaraj de Condappa

Subject: Re: how to find probable rain wall from past data (PMP)   
Posted: 5/24/2015 Viewed: 7127 times
Well I always tend to opt for the simpler approach: did you try to calculate the empiric cumulative distribution of your 50 years data?

Cf. for instance http://homepages.cae.wisc.edu/~ie642/content/Techniques/EmpiricalDistributions/empirica.htm on how to do it.

This will only calculate the percentage of occurence of the maximum observed rainfall in your 50 year data, it won't extrapolate to a more extreme probability (such as 1 in 100 years, 1 in 1000 years), for this you'd have to use a statistical model.
Topic "how to find probable rain wall from past data (PMP)"