Standardized Drought Analysis Toolbox (SDAT)

Version (7.51 MB) by HRL
SDAT offers a generalized framework for deriving nonparametric standardized drought indices.
Updated 3 Sep 2015

View License

The Standardized Drought Analysis Toolbox (SDAT) offers a generalized framework for deriving nonparametric standardized drought indices. Current indicators suffer from deficiencies including temporal inconsistency, and statistical incomparability. Different indicators have varying scales and ranges and their values cannot be compared with each other directly. Most drought indicators rely on a representative parametric probability distribution function that fits the data. However, a parametric distribution function may not fit the data, especially in continental/global scale studies. SDAT is based on a nonparametric framework that can be applied to different climatic variables including precipitation, soil moisture and relative humidity, without having to assume representative parametric distributions. The most attractive feature of the framework is that it leads to statistically consistent drought indicators based on different variables.
SDAT can be used to generate nonparametric standardized drought indicators such as:
- Standardized Precipitation Index (SPI),
- Standardized Soil Moisture Index (SSI),
- Standardized Runoff Index (SRI)
- Standardized Streamflow Index (SSFI),
- Standardized Relative Humidity Index (SRHI),
- Standardised Groundwater level Index (SGI),
- Standardized Surface Water Supply Index (SSWSI),
- Standardized Water Storage Index (SWSI).
For more information, a user guide and sample input data visit:
Hao Z., AghaKouchak A., Nakhjiri N., Farahmand A., 2014, Global Integrated Drought Monitoring and Prediction System, Scientific Data, 1:140001, 1-10, doi: 10.1038/sdata.2014.1.

Farahmand A., AghaKouchak A., 2015, A Generalized Framework for Deriving Nonparametric Standardized Drought Indicators, Advances in Water Resources, 76, 140-145, doi: 10.1016/j.advwatres.2014.11.012.

Cite As

HRL (2024). Standardized Drought Analysis Toolbox (SDAT) (, MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2011b
Compatible with any release
Platform Compatibility
Windows macOS Linux
Find more on Weather and Atmospheric Science in Help Center and MATLAB Answers

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!



Version Published Release Notes

Information page updated.
Codes and description updated.