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Assessment of Trends in Extreme Precipitation Events: A Case Study in Piedmont (North-West Italy)

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  • Helmi Saidi
  • Marzia Ciampittiello
  • Claudia Dresti
  • Giorgio Ghiglieri

Abstract

Intensification of heavy precipitation as discussed in climate change studies has become a public concern, but it has not yet been examined well with observed data, particularly with data at short temporal scale like hourly and sub-hourly data. The original data set was retrieved by using an automated recovery approach. We chose four stations, namely, Vercelli (since 1927), Bra (since 1933), Lombriasco (since 1939) and Pallanza (since 1950) which are located in the northwest of Italy. We assessed trends for durations from 5 min to 12 h in seasonal, annual maxima, and number and magnitude of exceedances of the 95th percentile. Split sample tests have been undertaken to assess differences in quantile estimates derived using a Generalised Pareto distribution fitted to Peaks-Over-Threshold series. The statistical analyses performed include parametric and non-parametric tests. Mostly, we cannot reject the trend stationarity hypothesis. There is no uniform trend on extreme events in the whole area. However, some trends are evident and significant for specific stations and specific indices. Specifically, it is obvious that extreme rainfall events have risen in the last 20 years only for short durations. Copyright Springer Science+Business Media Dordrecht 2015

Suggested Citation

  • Helmi Saidi & Marzia Ciampittiello & Claudia Dresti & Giorgio Ghiglieri, 2015. "Assessment of Trends in Extreme Precipitation Events: A Case Study in Piedmont (North-West Italy)," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 29(1), pages 63-80, January.
  • Handle: RePEc:spr:waterr:v:29:y:2015:i:1:p:63-80
    DOI: 10.1007/s11269-014-0826-5
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    References listed on IDEAS

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    1. Hong Wu & Leen-Kiat Soh & Ashok Samal & Xun-Hong Chen, 2008. "Trend Analysis of Streamflow Drought Events in Nebraska," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 22(2), pages 145-164, February.
    2. João Santos & Maria Portela & Inmaculada Pulido-Calvo, 2011. "Regional Frequency Analysis of Droughts in Portugal," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 25(14), pages 3537-3558, November.
    3. Sheng Yue & ChunYuan Wang, 2004. "The Mann-Kendall Test Modified by Effective Sample Size to Detect Trend in Serially Correlated Hydrological Series," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 18(3), pages 201-218, June.
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    Cited by:

    1. Peng Jiang & Zhongbo Yu & Mahesh R. Gautam & Kumud Acharya, 2016. "The Spatiotemporal Characteristics of Extreme Precipitation Events in the Western United States," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 30(13), pages 4807-4821, October.
    2. M. Ciampittiello & H. Saidi & C. Dresti & M. Coluccino & L. Turconi & W. W. Little & F. Luino, 2021. "Landslides along the Lago Maggiore western coast (northern Italy): intense rainfall as trigger or concomitant cause?," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 107(2), pages 1225-1250, June.

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