Observations for
Minimum Precipitation for a Return Period of years mm

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Guatemala

This map shows the minimum precipitation amounts for multiple return periods for Guatemala using a Regional Frequency Analysis using L-moments (RFA-LM).

The RFA-LM (Nunez et al., 2010) determines the frequency of drought events by pooling stations in climatologically homogeneous regions. This allows application of more robust statistics, especially in regions with limited datasets such as the drylands.

The L-moment-approach is an improvement over normal moment theory, as outliers and extreme events do not disproportionately influence distribution selection. As such, the RFA-LM method is the most approriate method in regions with interannual variability and short record lengths. More information on the methodology of the RFA-LM can be found here.

References

Nuñez, J.H., K. Verbist, J. Wallis, M. Schaeffer, L. Morales, and W.M. Cornelis. 2011. Regional frequency analysis for mapping drought events in north-central Chile. J. Hydrol. 405 352-366.

This map was developed in collaboration with Logo Guatemala

Dataset Documentation

Drought Frequency Analysis

Data
Drought Atlas of Latin America and the Caribbean
Data Source
CAZALAC Center, Drought Atlas
Analysis
Regional Frequency Analysis using L-Moments

Dataset

Access the dataset used to create this map.

Helpdesk

Contact mwar_lac@unesco.org with any technical questions or problems with this Map Room.