Welcome to WEAP's Website WEAP
WEAP is an initiative of the Stockholm Environment Institute.

About WEAP

What's New?
Sample Screens
History and Credits

Using WEAP
User Guide
Videos (YouTube)

User Forum
Members List
Edit Profile

Additional Support
University Courses

About Us
SEI-US Water Resources Program
Please Contact Us

Interested in Energy?
Read about LEAP: SEI's software for energy planning.

Link WEAP and LEAP for combined Water-Energy planning.
Watch a video demo!

User Forum

All Topics | Topic "how to find probable rain wall from past data (PMP)"
Log in to post new messages or reply to existing messages.
Author Message
Mr. ulageswaran kishokumar

Subject: how to find probable rain wall from past data (PMP)   
Posted: 5/21/2015 Viewed: 15878 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.
Dr. Devaraj de Condappa

Subject: Re: how to find probable rain wall from past data (PMP)   
Posted: 5/24/2015 Viewed: 15832 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)"