ZH-RainSim

ZH-RainSim is a standalone desktop tool for generating future rainfall ensembles from Global Climate Models (GCMs). It utilizes a Markov Chain occurrence model coupled with a Gamma distribution for intensity to downscale and simulate daily rainfall series. A licence agreement protects the application. It may be used free of charge, with due acknowledgement to the model’s developer, for academic research purposes. For use within a research project, a licence is required. ZH-RainSim cannot be used for any commercial purposes.

Key Features:

1. Automated Downscaling: Uses observational data to correct GCM biases.
2. Ensemble Generation: Generates up to 500 stochastic rainfall scenarios.
3. Visual Analysis: Instantly plots histograms, monthly trends, and annual totals.
4. Data Export: Saves all generated ensembles to .csv for further analysis.

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⬇️ Download and Guideline

Download ZH‑RainSim from the official website or the GitHub Repository - 

• Version 1.1.0 (20th Feb 2026) - Installer & Guideline
• Version 1.0.0 (6th Feb 2026) - Installer & Guideline

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📢 Announcements!

Breaking News - 20 February 2026

ZH-RainSim v1.1.0 - New Model Validation & Major Stability Improvements. This update brings major improvements to how researchers can validate their climate models, alongside critical backend fixes to make the software run faster and more reliably on all Windows PCs.

Breaking News - 10 February 2026

ZH-RainSim can be downloaded from the GitHub Repository

Obtaining Global Climate Model (GCM) data from the CMIP6 archive - 10 February 2026

All CMIP6 models and scenarios can be downloaded from the Copernicus Climate Data Store.

(Guideline/Tutorial)

Breaking News - 10 February 2026
The source code and user interface of ZH-RainSim have been officially registered for copyright with MyIPO (Reference: CRLY2026P00740)

Breaking News - 6 February 2026
ZH-RainSim 1.0 released...