Changements historiques à long terme du débit écoulé dans le Haut bassin du fleuve Sénégal

<p>In this study, the flow trends on either side of the Manantali dam, in the upper Senegal River basin, were assessed. The assessment was carried out for the period 1970 to 2019 using the Sen slope and the Mann-Kendall test. The Mann-Kendall trend test was used to indicate the direction of th...

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Autor principal:	C. Faye
Formato:	article
Lenguaje:	EN
Publicado:	Copernicus Publications 2021
Materias:	Environmental sciences GE1-350 Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/0a566a77b7d841afbc3b2c31d288ef8b
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spelling	oai:doaj.org-article:0a566a77b7d841afbc3b2c31d288ef8b2021-11-16T07:04:09ZChangements historiques à long terme du débit écoulé dans le Haut bassin du fleuve Sénégal10.5194/piahs-384-149-20212199-89812199-899Xhttps://doaj.org/article/0a566a77b7d841afbc3b2c31d288ef8b2021-11-01T00:00:00Zhttps://piahs.copernicus.org/articles/384/149/2021/piahs-384-149-2021.pdfhttps://doaj.org/toc/2199-8981https://doaj.org/toc/2199-899X<p>In this study, the flow trends on either side of the Manantali dam, in the upper Senegal River basin, were assessed. The assessment was carried out for the period 1970 to 2019 using the Sen slope and the Mann-Kendall test. The Mann-Kendall trend test was used to indicate the direction of the trends, while the Sen slope was used to assess the magnitude of the change. The results of the study showed that there was an upward trend in the flow of the Senegal River both annually and for every month upstream (Bafing-Makana station) and downstream (Bakel station) from the barrage. The strongest upward trend is noted in October on the upstream station with 4.12 m<span class="inline-formula"><sup>3</sup></span>/month and in September on the downstream station with 10.99 m<span class="inline-formula"><sup>3</sup></span>/month. In return, the weakest upward trend is observed in May on the upstream station with 0.07 m<span class="inline-formula"><sup>3</sup></span>/month and in August on the downstream station with 0.67 m<span class="inline-formula"><sup>3</sup></span>/month. The annual flow also showed a significant increase upstream (with a rate of 0.35 m<span class="inline-formula"><sup>3</sup></span>/year) and downstream (with a rate of 4.53 m<span class="inline-formula"><sup>3</sup></span>/year) with a confidence level of 99 %. The results of the study also showed that an increase in precipitation causes an increase in runoff, despite the construction of hydraulic structures.</p>C. FayeCopernicus PublicationsarticleEnvironmental sciencesGE1-350GeologyQE1-996.5ENProceedings of the International Association of Hydrological Sciences, Vol 384, Pp 149-153 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Environmental sciences GE1-350 Geology QE1-996.5
spellingShingle	Environmental sciences GE1-350 Geology QE1-996.5 C. Faye Changements historiques à long terme du débit écoulé dans le Haut bassin du fleuve Sénégal
description	<p>In this study, the flow trends on either side of the Manantali dam, in the upper Senegal River basin, were assessed. The assessment was carried out for the period 1970 to 2019 using the Sen slope and the Mann-Kendall test. The Mann-Kendall trend test was used to indicate the direction of the trends, while the Sen slope was used to assess the magnitude of the change. The results of the study showed that there was an upward trend in the flow of the Senegal River both annually and for every month upstream (Bafing-Makana station) and downstream (Bakel station) from the barrage. The strongest upward trend is noted in October on the upstream station with 4.12 m<span class="inline-formula"><sup>3</sup></span>/month and in September on the downstream station with 10.99 m<span class="inline-formula"><sup>3</sup></span>/month. In return, the weakest upward trend is observed in May on the upstream station with 0.07 m<span class="inline-formula"><sup>3</sup></span>/month and in August on the downstream station with 0.67 m<span class="inline-formula"><sup>3</sup></span>/month. The annual flow also showed a significant increase upstream (with a rate of 0.35 m<span class="inline-formula"><sup>3</sup></span>/year) and downstream (with a rate of 4.53 m<span class="inline-formula"><sup>3</sup></span>/year) with a confidence level of 99 %. The results of the study also showed that an increase in precipitation causes an increase in runoff, despite the construction of hydraulic structures.</p>
format	article
author	C. Faye
author_facet	C. Faye
author_sort	C. Faye
title	Changements historiques à long terme du débit écoulé dans le Haut bassin du fleuve Sénégal
title_short	Changements historiques à long terme du débit écoulé dans le Haut bassin du fleuve Sénégal
title_full	Changements historiques à long terme du débit écoulé dans le Haut bassin du fleuve Sénégal
title_fullStr	Changements historiques à long terme du débit écoulé dans le Haut bassin du fleuve Sénégal
title_full_unstemmed	Changements historiques à long terme du débit écoulé dans le Haut bassin du fleuve Sénégal
title_sort	changements historiques à long terme du débit écoulé dans le haut bassin du fleuve sénégal
publisher	Copernicus Publications
publishDate	2021
url	https://doaj.org/article/0a566a77b7d841afbc3b2c31d288ef8b
work_keys_str_mv	AT cfaye changementshistoriquesalongtermedudebitecouledanslehautbassindufleuvesenegal
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Changements historiques à long terme du débit écoulé dans le Haut bassin du fleuve Sénégal

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