Spatial variability and interdependence of rain event characteristics in the Czech Republic

Authors

  • Martin Hanel,

    Corresponding author
    1. T. G. Masaryk Water Research Institute, Prague, Czech Republic
    2. Czech University of Life Sciences, Prague, Czech Republic
    3. Technical University Liberec, Liberec, Czech Republic
    • Correspondence to: Martin Hanel, Department of Hydrology, T. G. Masaryk Water Research Institute, p.r.i., Podbabská 30, Prague 6, Czech Republic.

      E-mail: hanel@vuv.cz

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  • Petr Máca

    1. Czech University of Life Sciences, Prague, Czech Republic
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Abstract

Rain event characteristics are assessed in a 10-year (1991–2000) record for 122 stations in the Czech Republic. Individual rain events are identified using the minimum interevent time (mit) concept. For each station, the optimal mit value is estimated by examining the distribution of interevent times. In addition, various mit values are considered to account for the effect of mit on rain event characteristics and their interrelationships.

The interdependence between rain event characteristics and altitude, average rainfall depth, and geographic location are explored using simple linear models. Most rain event characteristics can be to some extent explained by average total rainfall or altitude, although models including the former significantly outperformed models using the latter.

Significant correlation was found among several pairs of monthly mean characteristics often including event rain rate (with event duration, depth, maximum intensity, and fraction of intraevent rainless periods). Moreover, strong correlation was revealed between number of events, interevent time, event depth, and duration. In general, correlation decreases in absolute value with mit.

Strong spatial correlation was found for the mean monthly interevent time and number of events. Spatial correlation was considerably smaller for other characteristics. In general, spatial dependence was smaller for larger mit values. Copyright © 2013 John Wiley & Sons, Ltd.

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