Authors: A G Yilmaz B J C Perera
Publish Date: 2015/07/24
Volume: 29, Issue: 12, Pages: 4465-4480
Abstract
Extreme rainfall events are among the natural hazards with catastrophic impacts on human society Trend analysis is important to understand the effects of climate change and variability on extreme rainfalls In this study extreme rainfall ie annual maximums trends were investigated in Victoria Australia using data from 23 stations for storm durations of 10 and 30 min and 1 3 6 12 24 and 48 h The MannKendal and Spearman’s Rho tests were employed for detection of temporal trends Moreover the spatial variability of extreme rainfall trends was investigated through interpolation of TheilSen’s estimator over Victoria In general increasing extreme rainfall trends were detected for short storm durations ie 10 and 30 min and 1 and 3 h whereas decreasing extreme rainfall trends were found for long storm durations ie 6 12 24 and 48 h Increasing trends for short storm durations were mostly statistically significant while decreasing trends for long storm durations were statistically insignificant Trend analysis with respect to the four regions ie Western Northern Central and Gippsland in Victoria showed that increasing trends were present in general in the Northern and east Central Region whereas decreasing trends were detected in the Western and west Gippsland Regions
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