Trend Analysis of Hydro-Meteorological Variables in the Wadi Ouahrane Basin, Algeria

Author:

Achite Mohammed1ORCID,Caloiero Tommaso2ORCID,Wałęga Andrzej3ORCID,Ceppi Alessandro4ORCID,Bouharira Abdelhak1

Affiliation:

1. Laboratory of Water & Environment, Faculty of Nature and Life Sciences, University Hassiba Benbouali of Chlef, P.B 78C, Ouled Fares, Chlef 02180, Algeria

2. National Research Council of Italy—Research Institute for Geo-Hydrological Protection (CNR-IRPI), 87036 Rende, CS, Italy

3. Department of Sanitary Engineering and Water Management, University of Agriculture in Krakow, Mickiewicza 24/28 Street, 30-059 Krakow, Poland

4. Department of Civil and Environmental Engineering (D.I.C.A.), Politecnico di Milano, 20133 Milano, MI, Italy

Abstract

In recent decades, a plethora of natural disasters, including floods, storms, heat waves, droughts, and various other weather-related events, have brought destruction worldwide. In particular, Algeria is facing several natural hydrometeorological and geological hazards. In this study, meteorological parameters (precipitation, temperature, relative humidity, wind speed, and sunshine) and runoff data were analyzed for the Wadi Ouahrane basin (northern Algeria), into which drains much of the surrounding agricultural land and is susceptible to floods. In particular, a trend analysis was performed using the Mann–Kendall (MK) test, the Sen’s slope estimator, and the Innovative Trend Analysis (ITA) method to detect possible trends in the time series over the period 1972/73–2017/2018. The results revealed significant trends in several hydro-meteorological variables. In particular, neither annual nor monthly precipitation showed a clear tendency, thus failing to indicate potential changes in the rainfall patterns. Temperature evidenced a warming trend, indicating a potential shift in the local climate, while streamflow revealed a decreasing trend, reflecting the complex interaction between precipitation and other hydrological factors.

Publisher

MDPI AG

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