New approach to detect trends in extreme rain categories by the ITA method in northwest Algeria

Benzater B., Elouissi A., Dabanli I., Harkat S., Hamimed A.

HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES, vol.66, no.16, pp.2298-2311, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 66 Issue: 16
  • Publication Date: 2021
  • Doi Number: 10.1080/02626667.2021.1990931
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, IBZ Online, PASCAL, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Compendex, Geobase, INSPEC, Pollution Abstracts, Civil Engineering Abstracts
  • Page Numbers: pp.2298-2311
  • Keywords: extreme rain, migration movements, trends, modified ITA, Macta-Algeria, CLIMATE-CHANGE IMPACT, PRECIPITATION EVENTS, FLOOD RISK, DROUGHT, MODEL, VULNERABILITY, FREQUENCY
  • Istanbul Technical University Affiliated: No


A new approach for the modified method of innovative trend analysis (ITA) was applied to the categories of maximum daily rains coming from 41 pluviometric stations of Macta (northwest Algeria) for the period 1970-2010. Six categories of maximum daily rainfall were considered: light: 0-4 mm/day (A); mild to moderate: 4-16 mm/day (B); moderate to heavy: 16-32 mm/day (C-1); heavy: 32-64 mm/day (C-2); heavy to torrential: 64-128 mm/day (D-1); and torrential: equal to or greater than 128 mm/day (D-2). The results show that during the second period (1990-2010), increasing trends were detected in the middle categories B (most frequent: 20.78%), C-1 (17.85%), C-2 (20.21%) and D-1 (4.92%). In addition, migratory movements and rainy events towards the higher categories were detected (in particular towards C-1 (8.84%)). These results show an increase in extreme rains in the Macta watershed during the period 1990-2010.