{"id":880,"date":"2024-04-22T14:24:50","date_gmt":"2024-04-22T12:24:50","guid":{"rendered":"https:\/\/acepartnerz.kinsta.cloud\/res-eau\/?post_type=boursier&#038;p=880"},"modified":"2024-09-24T17:32:46","modified_gmt":"2024-09-24T15:32:46","slug":"fatou-josiane-guehi","status":"publish","type":"boursier","link":"https:\/\/ace-partner.org\/res-eau\/boursier\/fatou-josiane-guehi\/","title":{"rendered":"Fatou Josiane Guehi"},"content":{"rendered":"\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-primary-4-color\">Ann\u00e9e de d\u00e9part : Mars 2022<\/mark><\/strong><\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-primary-4-color\">Date de soutenance de th\u00e8se :  F\u00e9vrier 2025<br>Profil ORCID<\/mark><\/strong>:<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-primary-4-color\"><a href=\" https:\/\/orcid.org\/0000-0002-6772-8253\"> <\/a><\/mark><\/strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-primary-4-color\"><a href=\"https:\/\/orcid.org\/0009-0000-8845-7045\"><strong>0009-0000-8845-7045<\/strong><\/a><\/mark><\/p>\n\n\n\n<ul class=\"wp-block-social-links is-layout-flex wp-block-social-links-is-layout-flex\"><li class=\"wp-social-link wp-social-link-linkedin  wp-block-social-link\"><a href=\"https:\/\/www.linkedin.com\/in\/fatou-josiane-guehi-10a319141\/\" class=\"wp-block-social-link-anchor\"><svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\" focusable=\"false\"><path d=\"M19.7,3H4.3C3.582,3,3,3.582,3,4.3v15.4C3,20.418,3.582,21,4.3,21h15.4c0.718,0,1.3-0.582,1.3-1.3V4.3 C21,3.582,20.418,3,19.7,3z M8.339,18.338H5.667v-8.59h2.672V18.338z M7.004,8.574c-0.857,0-1.549-0.694-1.549-1.548 c0-0.855,0.691-1.548,1.549-1.548c0.854,0,1.547,0.694,1.547,1.548C8.551,7.881,7.858,8.574,7.004,8.574z M18.339,18.338h-2.669 v-4.177c0-0.996-0.017-2.278-1.387-2.278c-1.389,0-1.601,1.086-1.601,2.206v4.249h-2.667v-8.59h2.559v1.174h0.037 c0.356-0.675,1.227-1.387,2.526-1.387c2.703,0,3.203,1.779,3.203,4.092V18.338z\"><\/path><\/svg><span class=\"wp-block-social-link-label screen-reader-text\">LinkedIn<\/span><\/a><\/li><\/ul>\n\n\n\n<p><strong>Titre de la th\u00e8se : Analyse satellite du lien entre syst\u00e8mes pr\u00e9cipitant et risque inondation.<\/strong><\/p>\n\n\n\n<p><strong><strong>R\u00e9sum\u00e9 du projet scientifique<\/strong> :<\/strong><br>L\u2019Afrique de l\u2019Ouest est l\u2019une des r\u00e9gions les plus vuln\u00e9rables aux \u00e9v\u00e8nements extr\u00eames et autres impacts caus\u00e9s par le changement climatique. La zone sah\u00e9lienne et en particulier la ville de Niamey est expos\u00e9e depuis les derni\u00e8res d\u00e9cennies \u00e0 une augmentation drastique des inondations pendant la saison des pluies, et notamment au ph\u00e9nom\u00e8ne dit de \u00ab crue rouge \u00bb. Une base de donn\u00e9es \u00e0 long terme sur le suivi des syst\u00e8mes convectifs \u00e0 m\u00e9so-\u00e9chelle (MCS) bas\u00e9e sur le MSG en Afrique de l&rsquo;Ouest est utilis\u00e9e pour \u00e9tudier l&rsquo;impact du nombre et de l&rsquo;intensit\u00e9 des syst\u00e8mes convectifs sur l&rsquo;hydrologie. Cette base de donn\u00e9es TOOCAN, d\u00e9velopp\u00e9e par Fiolleau et Roca (2013) est utilis\u00e9e conjointement avec un produit d&rsquo;estimation des pr\u00e9cipitations par satellite (Imerg) et un mod\u00e8le hydrologique, afin de quantifier l&rsquo;impact des MCS individuels sur le d\u00e9bit du Niger \u00e0 Niamey.<\/p>\n\n\n\n<p><strong>R\u00e9sum\u00e9 des r\u00e9sultats obtenus :<\/strong><br>Des tests de sensibilit\u00e9 du mod\u00e8le hydrologique MGB aux syst\u00e8mes pr\u00e9cipitants (MCS pour Mesoscale Convective System) qui alimentent le bassin du fleuve Niger durant la mousson, ont \u00e9t\u00e9 r\u00e9alis\u00e9s. La pluie associ\u00e9e \u00e0 chaque MCS identifi\u00e9 durant la saison de mousson en 2020 a pu \u00eatre quantifi\u00e9e et supprim\u00e9e, r\u00e9v\u00e9lant que ces MCS sont les premiers responsables de la mont\u00e9e des eaux \u00e0 Niamey. La suppression des pluies qu\u2019ils produisent fait totalement dispara\u00eetre la crue rouge. 10 MCS particuliers se sont r\u00e9v\u00e9l\u00e9s \u00eatre responsables d\u2019une baisse du d\u00e9bit de plus de 50% : ce sont les MCS associ\u00e9s aux plus grands volumes d\u2019eau pr\u00e9cipit\u00e9s sur la zone d\u2019\u00e9tude. Ces MCS sont tr\u00e8s rapides, avec de grandes tailles, des sommets tr\u00e8s froids et de longues dur\u00e9es de vie. Ces r\u00e9sultats mettent en \u00e9vidence, l\u2019importance des syst\u00e8mes convectifs de mousson dans le bilan hydrologique du bassin du Niger.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ann\u00e9e de d\u00e9part : Mars 2022 Date de soutenance de th\u00e8se : F\u00e9vrier 2025Profil ORCID: 0009-0000-8845-7045 Titre de la th\u00e8se : Analyse satellite du lien entre syst\u00e8mes pr\u00e9cipitant et risque inondation. R\u00e9sum\u00e9 du projet scientifique :L\u2019Afrique de l\u2019Ouest est l\u2019une des r\u00e9gions les plus vuln\u00e9rables aux \u00e9v\u00e8nements extr\u00eames et autres impacts caus\u00e9s par le changement [&hellip;]<\/p>\n","protected":false},"featured_media":885,"menu_order":0,"template":"","meta":{"_acf_changed":false,"inline_featured_image":false},"class_list":["post-880","boursier","type-boursier","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fatou Josiane Guehi - RES-EAU<\/title>\n<meta name=\"description\" content=\"Analyse satellite du lien entre syst\u00e8mes pr\u00e9cipitants et risque inondation\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ace-partner.org\/res-eau\/boursier\/fatou-josiane-guehi\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fatou Josiane Guehi\" \/>\n<meta property=\"og:description\" content=\"Analyse satellite du lien entre syst\u00e8mes pr\u00e9cipitants et risque inondation.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ace-partner.org\/res-eau\/boursier\/fatou-josiane-guehi\/\" \/>\n<meta property=\"og:site_name\" content=\"RES-EAU\" \/>\n<meta property=\"article:modified_time\" content=\"2024-09-24T15:32:46+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/ace-partner.org\/res-eau\/wp-content\/uploads\/sites\/4\/2024\/04\/Photo_Josiane_pour_acepartner.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"486\" \/>\n\t<meta property=\"og:image:height\" content=\"1080\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Fatou Josiane Guehi\" \/>\n<meta name=\"twitter:description\" content=\"Analyse satellite du lien entre syst\u00e8mes pr\u00e9cipitants et risque inondation.\" \/>\n<meta name=\"twitter:image\" content=\"https:\/\/ace-partner.org\/res-eau\/wp-content\/uploads\/sites\/4\/2024\/04\/Photo_Josiane_pour_acepartner.jpg\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/ace-partner.org\\\/res-eau\\\/boursier\\\/fatou-josiane-guehi\\\/\",\"url\":\"https:\\\/\\\/ace-partner.org\\\/res-eau\\\/boursier\\\/fatou-josiane-guehi\\\/\",\"name\":\"Fatou Josiane Guehi - 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