Spatio-temporal trends in daily maximum rainfall in northwestern Algeria (Macta watershed case, Algeria)
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ORIGINAL PAPER
Spatio-temporal trends in daily maximum rainfall in northwestern Algeria (Macta watershed case, Algeria) Benali Benzater 1 & Abdelkader Elouissi 2 & Boumedienne Benaricha 3 & Mohammed Habi 4 Received: 9 January 2019 / Accepted: 17 April 2019 / Published online: 1 June 2019 # Saudi Society for Geosciences 2019
Abstract Results of extreme precipitation trend analysis, at different spatial and temporal scales, have become alarming since the last century, due to the global climate change. This work describes the impact of climate change on the distribution and trend of maximum daily rainfall in the Macta watershed. Monthly maximum rainfall data that were collected over 41 years (1970 to 2010) on 41 stations were used to validate the present research. The extreme values of rainfall maxima (200 to 264 mm/d) are located in the northeastern part of the basin during the spring season. From 1992 onwards, shifts are observed from monthly, seasonal in addition to significant annual trends. Monthly, seasonal, and annual rainfall maxima trend analyses were identified using three methods, which are Mayer’s adjustment method, Şen’s innovative method (2012), and the Bravais-Pearson test. The study found out a downward trend during the first period (1970–1992). On the other hand, the second period (1992–2010) revealed significant upward trends. Climate change affects all regions except the center part of the study basin. Keywords Algeria . Breaking . Climate change . Extreme rainfall . Macta trend
Introduction The warming of the global climate system is unequivocal (IPCC 2007, 2013). Today, the questions, such as BDoes the climate change^? BWill the earth warm up?^, no longer arise. Changes in weather and climate extremes impact and pose serious challenges for societies (CCSP 2008). The analysis of extreme weather events related to climate change is one of the biggest challenges facing the scientific community because they have a major impact on the physical environment and the socio-economic sector (Kostopoulou and Jones 2005). Water resources, agriculture, ecosystems, forestry, health, insurance, and industry are some of the most
studied sectors (Parry et al. 2004). The extreme climate associated with temperature and precipitation can also affect energy consumption, human comfort, and tourism (Henderson and Muller 1997; Weisse 1998; Subak et al. 2000). Several studies have been done on extreme rainfall trends (Caloieroa et al. 2016; Carvalho et al. 2014; Keggenhoff et al. 2014; Westra et al. 2012; Brugnara et al. 2012; Lopez-Moreno et al. 2011; Shang et al. 2011). There is substantial empirical and climatological evidence that extremes of precipitation increased during the twentieth century and that this trend is expected to continue with global warming (Mannshardt-Shamseldin et al. 2010).
Handling Editor: Fernando Al Pacheco * Benali Benzater [email protected]
1
Biological Systems and Geomatics Research Laboratory (LRSBG), Faculty of Natural and Life Sciences, Mustapha Stambouli University of Ma
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