Spatial and Temporal Analysis of Dry and Wet Spells in the Wadi Cheliff Basin, Algeria
The Mediterranean Basin, located in a transition zone between the temperate and rainy climate of central Europe and the arid climate of North Africa, is considered a major hotspot of climate change, subject to water scarcity and drought. In this work, dry and wet spells have been analyzed in the Wad...
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MDPI AG
2021-06-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/12/6/798 |
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| author | Mohammed Achite Nir Y. Krakauer Andrzej Wałęga Tommaso Caloiero |
| author_facet | Mohammed Achite Nir Y. Krakauer Andrzej Wałęga Tommaso Caloiero |
| author_sort | Mohammed Achite |
| collection | DOAJ |
| description | The Mediterranean Basin, located in a transition zone between the temperate and rainy climate of central Europe and the arid climate of North Africa, is considered a major hotspot of climate change, subject to water scarcity and drought. In this work, dry and wet spells have been analyzed in the Wadi Cheliff basin (Algeria) by means of annual precipitation observed at 150 rain gauges in the period 1970–2018. In particular, the characteristics of dry and wet spells (frequency, duration, severity, and intensity) have been evaluated by means of the run theory applied to the 12-month standardized precipitation index (SPI) values. Moreover, in order to detect possible tendencies in the SPI values, a trend analysis has been performed by means of two non-parametric tests, the Theil–Sen and Mann–Kendall test. The results indicated similar values of frequency, severity, duration, and intensity between the dry and the wet spells, although wet events showed higher values in the extreme. Moreover, the results of the trend analysis evidenced a different behavior between the northern side of the basin, characterized by a negative trend in the 12-month SPI values, and the southern side, in which positive trends were detected. |
| first_indexed | 2024-03-10T10:12:45Z |
| format | Article |
| id | doaj.art-87da75b9b40f42d5a14be598310c089f |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-10T10:12:45Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-87da75b9b40f42d5a14be598310c089f2023-11-22T01:05:33ZengMDPI AGAtmosphere2073-44332021-06-0112679810.3390/atmos12060798Spatial and Temporal Analysis of Dry and Wet Spells in the Wadi Cheliff Basin, AlgeriaMohammed Achite0Nir Y. Krakauer1Andrzej Wałęga2Tommaso Caloiero3Laboratory of Water & Environment, Faculty of Nature and Life Sciences, University Hassiba Benbouali of Chlef, Chlef 02180, AlgeriaDepartment of Civil Engineering and NOAA-CREST, The City College of New York, New York, NY 10031, USADepartment of Sanitary Engineering and Water Management, University of Agriculture in Krakow, Mickiewicza 24/28 Street, 30-059 Krakow, PolandNational Research Council of Italy, Institute for Agriculture and Forest Systems in the Mediterranean (CNR-ISAFOM), 87036 Rende (CS), ItalyThe Mediterranean Basin, located in a transition zone between the temperate and rainy climate of central Europe and the arid climate of North Africa, is considered a major hotspot of climate change, subject to water scarcity and drought. In this work, dry and wet spells have been analyzed in the Wadi Cheliff basin (Algeria) by means of annual precipitation observed at 150 rain gauges in the period 1970–2018. In particular, the characteristics of dry and wet spells (frequency, duration, severity, and intensity) have been evaluated by means of the run theory applied to the 12-month standardized precipitation index (SPI) values. Moreover, in order to detect possible tendencies in the SPI values, a trend analysis has been performed by means of two non-parametric tests, the Theil–Sen and Mann–Kendall test. The results indicated similar values of frequency, severity, duration, and intensity between the dry and the wet spells, although wet events showed higher values in the extreme. Moreover, the results of the trend analysis evidenced a different behavior between the northern side of the basin, characterized by a negative trend in the 12-month SPI values, and the southern side, in which positive trends were detected.https://www.mdpi.com/2073-4433/12/6/798droughtSPIrun theorySen’s estimatorMann–KendallWadi Cheliff Basin |
| spellingShingle | Mohammed Achite Nir Y. Krakauer Andrzej Wałęga Tommaso Caloiero Spatial and Temporal Analysis of Dry and Wet Spells in the Wadi Cheliff Basin, Algeria Atmosphere drought SPI run theory Sen’s estimator Mann–Kendall Wadi Cheliff Basin |
| title | Spatial and Temporal Analysis of Dry and Wet Spells in the Wadi Cheliff Basin, Algeria |
| title_full | Spatial and Temporal Analysis of Dry and Wet Spells in the Wadi Cheliff Basin, Algeria |
| title_fullStr | Spatial and Temporal Analysis of Dry and Wet Spells in the Wadi Cheliff Basin, Algeria |
| title_full_unstemmed | Spatial and Temporal Analysis of Dry and Wet Spells in the Wadi Cheliff Basin, Algeria |
| title_short | Spatial and Temporal Analysis of Dry and Wet Spells in the Wadi Cheliff Basin, Algeria |
| title_sort | spatial and temporal analysis of dry and wet spells in the wadi cheliff basin algeria |
| topic | drought SPI run theory Sen’s estimator Mann–Kendall Wadi Cheliff Basin |
| url | https://www.mdpi.com/2073-4433/12/6/798 |
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