Spatio-temporal trends of hydrological components: the case of the Tafna basin (northwestern Algeria)

Climate change is expected to increase in the future in the Mediterranean region, including Algeria. The Tafna basin, vulnerable to drought, is one of the most important catchments ensuring water self-sufficiency in northwestern Algeria. The objective of this study is to estimate the evolution of hy...

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Autores principales: Amina Mami, Djilali Yebdri, Sabine Sauvage, Mélanie Raimonet, José Miguel
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Publicado: IWA Publishing 2021
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spelling oai:doaj.org-article:0b19c6221c2a42b2921cda11252bcc072021-11-09T23:59:18ZSpatio-temporal trends of hydrological components: the case of the Tafna basin (northwestern Algeria)2040-22442408-935410.2166/wcc.2021.242https://doaj.org/article/0b19c6221c2a42b2921cda11252bcc072021-11-01T00:00:00Zhttp://jwcc.iwaponline.com/content/12/7/2948https://doaj.org/toc/2040-2244https://doaj.org/toc/2408-9354Climate change is expected to increase in the future in the Mediterranean region, including Algeria. The Tafna basin, vulnerable to drought, is one of the most important catchments ensuring water self-sufficiency in northwestern Algeria. The objective of this study is to estimate the evolution of hydrological components of the Tafna basin, throughout 2020–2099, compared to the period 1981–2000. The SWAT model (Soil and Water Assessment Tool), calibrated and validated on the Tafna basin with good Nash at the outlet 0.82, is applied to analyze the spatial and temporal evolution of hydrological components over the basin throughout 2020–2099. The application is produced using a precipitation and temperature minimum/maximum of an ensemble of climate model outputs obtained from a combination of eight global climate models and two regional climate models of the Coordinated Regional Climate Downscaling Experiment project. The results of this study show that the decrease of precipitation in January, on average −25%, ranged between −5% and −44% in the future period. This diminution affects all of the water components and fluxes of a watershed, namely, in descending order of impact: the river discharge causing a decrease −36%, the soil water available −31%, the evapotranspiration −30%, and the lateral flow −29%. HIGHLIGHTS Impact of climate change in northwestern Africa;; Modeling a semi-arid watershed using SWAT model;; Evaluation of the influence of decline rainfall on the hydrological cycle;; The use of RCMs of Cordex project, domain Africa;; Investigation of climatic trends at monthly scale.;Amina MamiDjilali YebdriSabine SauvageMélanie RaimonetJosé MiguelIWA Publishingarticlecordex-africahydrologyprecipitationswattafna basinEnvironmental technology. Sanitary engineeringTD1-1066Environmental sciencesGE1-350ENJournal of Water and Climate Change, Vol 12, Iss 7, Pp 2948-2976 (2021)
institution DOAJ
collection DOAJ
language EN
topic cordex-africa
hydrology
precipitation
swat
tafna basin
Environmental technology. Sanitary engineering
TD1-1066
Environmental sciences
GE1-350
spellingShingle cordex-africa
hydrology
precipitation
swat
tafna basin
Environmental technology. Sanitary engineering
TD1-1066
Environmental sciences
GE1-350
Amina Mami
Djilali Yebdri
Sabine Sauvage
Mélanie Raimonet
José Miguel
Spatio-temporal trends of hydrological components: the case of the Tafna basin (northwestern Algeria)
description Climate change is expected to increase in the future in the Mediterranean region, including Algeria. The Tafna basin, vulnerable to drought, is one of the most important catchments ensuring water self-sufficiency in northwestern Algeria. The objective of this study is to estimate the evolution of hydrological components of the Tafna basin, throughout 2020–2099, compared to the period 1981–2000. The SWAT model (Soil and Water Assessment Tool), calibrated and validated on the Tafna basin with good Nash at the outlet 0.82, is applied to analyze the spatial and temporal evolution of hydrological components over the basin throughout 2020–2099. The application is produced using a precipitation and temperature minimum/maximum of an ensemble of climate model outputs obtained from a combination of eight global climate models and two regional climate models of the Coordinated Regional Climate Downscaling Experiment project. The results of this study show that the decrease of precipitation in January, on average −25%, ranged between −5% and −44% in the future period. This diminution affects all of the water components and fluxes of a watershed, namely, in descending order of impact: the river discharge causing a decrease −36%, the soil water available −31%, the evapotranspiration −30%, and the lateral flow −29%. HIGHLIGHTS Impact of climate change in northwestern Africa;; Modeling a semi-arid watershed using SWAT model;; Evaluation of the influence of decline rainfall on the hydrological cycle;; The use of RCMs of Cordex project, domain Africa;; Investigation of climatic trends at monthly scale.;
format article
author Amina Mami
Djilali Yebdri
Sabine Sauvage
Mélanie Raimonet
José Miguel
author_facet Amina Mami
Djilali Yebdri
Sabine Sauvage
Mélanie Raimonet
José Miguel
author_sort Amina Mami
title Spatio-temporal trends of hydrological components: the case of the Tafna basin (northwestern Algeria)
title_short Spatio-temporal trends of hydrological components: the case of the Tafna basin (northwestern Algeria)
title_full Spatio-temporal trends of hydrological components: the case of the Tafna basin (northwestern Algeria)
title_fullStr Spatio-temporal trends of hydrological components: the case of the Tafna basin (northwestern Algeria)
title_full_unstemmed Spatio-temporal trends of hydrological components: the case of the Tafna basin (northwestern Algeria)
title_sort spatio-temporal trends of hydrological components: the case of the tafna basin (northwestern algeria)
publisher IWA Publishing
publishDate 2021
url https://doaj.org/article/0b19c6221c2a42b2921cda11252bcc07
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AT sabinesauvage spatiotemporaltrendsofhydrologicalcomponentsthecaseofthetafnabasinnorthwesternalgeria
AT melanieraimonet spatiotemporaltrendsofhydrologicalcomponentsthecaseofthetafnabasinnorthwesternalgeria
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