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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IWA Publishing
2021
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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) |
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cordex-africa hydrology precipitation swat tafna basin Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 |
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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 |
work_keys_str_mv |
AT aminamami spatiotemporaltrendsofhydrologicalcomponentsthecaseofthetafnabasinnorthwesternalgeria AT djilaliyebdri spatiotemporaltrendsofhydrologicalcomponentsthecaseofthetafnabasinnorthwesternalgeria AT sabinesauvage spatiotemporaltrendsofhydrologicalcomponentsthecaseofthetafnabasinnorthwesternalgeria AT melanieraimonet spatiotemporaltrendsofhydrologicalcomponentsthecaseofthetafnabasinnorthwesternalgeria AT josemiguel spatiotemporaltrendsofhydrologicalcomponentsthecaseofthetafnabasinnorthwesternalgeria |
_version_ |
1718440718709555200 |