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Water 2015, 7(6), 3009-3023; doi:10.3390/w7063009

Analysis of Dry Spells in Southern Italy (Calabria)

1
National Research Council—Institute for Agricultural and Forest Systems in Mediterranean (CNR-ISAFOM), Via Cavour 4/6, Rende (CS) 87036, Italy
2
National Research Council—Research Institute for Geo-Hydrological Protection (CNR-IRPI), Via Cavour 4/6, Rende (CS) 87036, Italy
3
Department of Computer Engineering, Modelling, Electronics, and Systems Science (DIMES), University of Calabria, Via P. Bucci 41C, Rende (CS) 87036, Italy
4
Department of Environmental and Chemical Engineering (DIATIC), University of Calabria, Via P. Bucci 41C, Rende (CS) 87036, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Athanasios Loukas
Received: 30 April 2015 / Revised: 5 June 2015 / Accepted: 8 June 2015 / Published: 17 June 2015
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Abstract

A deficit in precipitation may impact greatly on soil moisture, snowpack, stream flow, groundwater, and reservoir storage. Among the several approaches available to analyze this phenomenon, one of the most applied is the analysis of dry spells. In this paper, an investigation of the spatial and temporal patterns of dry spells, in a region of southern Italy, has been carried out on a daily precipitation dataset. First, the frequency distributions of the sequences of dry days have been analyzed. Then, the regional areas most affected by dry events have been evaluated at annual and seasonal scale. Finally, the long-term trend of the dry spells has been estimated at annual and seasonal scale. Results show that the lower probabilities of long dry spells occur in the main reliefs of the region, while the highest values have been detected in the Ionian side. The spatial distribution of the mean and maximum length values of the dry spells evidenced a west–east gradient. The trend analysis mainly revealed a negative behavior in the duration of the dry spells at annual scale and a positive trend in the winter period. View Full-Text
Keywords: dry spells; trend; Calabria dry spells; trend; Calabria
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Caloiero, T.; Coscarelli, R.; Ferrari, E.; Sirangelo, B. Analysis of Dry Spells in Southern Italy (Calabria). Water 2015, 7, 3009-3023.

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