Supplement to Impacts of Climate Change on Rainfall Extremes and Urban Drainage Systems

This page hosts the supplement for the IWA Publication, Impacts of Climate Change on Rainfall Extremes and Urban Drainage Systems, by Patrick Willems, Jonas Olsson, Karsten Arnbjerg-NielsenSimon Beecham, Assela Pathirana, Ida Bülow GregersenHenrik Madsen and Van-Thanh-Van Nguyen.

This electronic supplement is intended to be dynamic, such that more practical examples and training material can/will be provided over time. Readers therefore are invited to add their own examples. If you wish to provide additional training material, scripts or examples, or wish to provide feedback regarding significant omissions for potential inclusion in future editions of the book, please contact: Patrick.Willems [at]


Matlab Scripts

Random Cascade Model Documentation

Random Cascade Model Disaggregation.m

Random Cascade Model Analysis.m

Sample Data Disaggregation.txt




Example dataset: 22421

Climate perturbation tool (ensemble of statistical downscaling methods) 

Running WRF Model in Personal Computers

Assela Pathirana (

You can download the WRF-live system from here: 

But be warned that it is huge (3.1 GB to be exact), so unless you have good internet bandwidth, it will take ages to download. Considering what is included (A full operating system, WRF modelling system, All the Geographic data needed, etc.) it is not surprising that this system is so large. 

After downloading use 7-zip ( to extract the file. 

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