{"id":7,"date":"2022-08-05T10:07:07","date_gmt":"2022-08-05T08:07:07","guid":{"rendered":"https:\/\/sarra-h-dev.teledetection.fr\/?page_id=7"},"modified":"2024-02-05T17:01:06","modified_gmt":"2024-02-05T16:01:06","slug":"accueil","status":"publish","type":"page","link":"https:\/\/sarra-h.teledetection.fr\/","title":{"rendered":""},"content":{"rendered":"\n<div class=\"wp-block-media-text alignwide is-stacked-on-mobile\" style=\"grid-template-columns:27% auto\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"512\" height=\"512\" src=\"https:\/\/sarra-h.teledetection.fr\/wp-content\/uploads\/2022\/10\/780754976_cereal_field_in_a_sahelian_environment__illustration__high_quality.png\" alt=\"\" class=\"wp-image-57 size-full\" srcset=\"https:\/\/sarra-h.teledetection.fr\/wp-content\/uploads\/2022\/10\/780754976_cereal_field_in_a_sahelian_environment__illustration__high_quality.png 512w, https:\/\/sarra-h.teledetection.fr\/wp-content\/uploads\/2022\/10\/780754976_cereal_field_in_a_sahelian_environment__illustration__high_quality-300x300.png 300w, https:\/\/sarra-h.teledetection.fr\/wp-content\/uploads\/2022\/10\/780754976_cereal_field_in_a_sahelian_environment__illustration__high_quality-150x150.png 150w\" sizes=\"auto, (max-width: 512px) 100vw, 512px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<p class=\"has-text-align-left\">Les mod\u00e8les de simulation de cultures <strong>SARRA<\/strong> sont particuli\u00e8rement adapt\u00e9s \u00e0 l&rsquo;analyse d&rsquo;impact du climat sur la croissance des c\u00e9r\u00e9ales s\u00e8ches et du rendement potentiel en milieu tropical : mil, sorgho, ma\u00efs et riz pluvial.<\/p>\n\n\n\n<p>Les mod\u00e8les <strong>SARRA <\/strong>sont modulaires, d\u00e9terministes, bas\u00e9s sur des relations simples et robustes. Ils permettent de simuler des strat\u00e9gies paysannes, pour r\u00e9aliser des analyses allant de la parcelle \u00e0 la r\u00e9gion.<\/p>\n<\/div><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"has-text-align-center\">Les mod\u00e8les SARRA se d\u00e9clinent en trois saveurs<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_75 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/sarra-h.teledetection.fr\/#%F0%9F%8C%B1SARRA-H\" >\ud83c\udf31SARRA-H<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/sarra-h.teledetection.fr\/#%F0%9F%8C%BFSARRA-O\" >\ud83c\udf3fSARRA-O<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/sarra-h.teledetection.fr\/#%F0%9F%8C%BESARRA-Py\" >\ud83c\udf3eSARRA-Py<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/sarra-h.teledetection.fr\/#Supporte_par_plus_de_30_ans_de_recherches\" >Support\u00e9 par plus de 30 ans de recherches<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%F0%9F%8C%B1SARRA-H\"><\/span>\ud83c\udf31SARRA-H<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>simulations ponctuelles<\/li>\n\n\n\n<li>interface utilisateur conviviale<\/li>\n\n\n\n<li>ex\u00e9cutable Windows<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/github.com\/SARRA-cropmodels\/SARRA-H\">Voir sur GitHub<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%F0%9F%8C%BFSARRA-O\"><\/span>\ud83c\udf3fSARRA-O<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>simulations spatialis\u00e9e<\/li>\n\n\n\n<li>interface utilisateur intuitive<\/li>\n\n\n\n<li>ex\u00e9cutable Java<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/github.com\/SARRA-cropmodels\/SARRA-O\">Voir sur GitHub<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%F0%9F%8C%BESARRA-Py\"><\/span>\ud83c\udf3eSARRA-Py<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>simulation ponctuelle et spatialis\u00e9e<\/li>\n\n\n\n<li>scripts Python, notebooks Jupyter<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/github.com\/SARRA-cropmodels\/SARRA-Py\">Voir sur GitHub<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>D\u00e9couvrez \u00e9galement SARRA-data-download, destin\u00e9 \u00e0 automatiser le t\u00e9l\u00e9chargement et la construction de s\u00e9ries temporelles geotiff \u00e0 partir des produits d&rsquo;estimation des pr\u00e9cipitations par satellite TAMSAT, CHIRPS, IMERG, et des variables agroclimatiques AgERA5.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-16018d1d wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/github.com\/SARRA-cropmodels\/SARRA-data-download\">Voir sur GitHub<\/a><\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"has-text-align-center\">Les mod\u00e8les SARRA sont construits autour d&rsquo;une m\u00eame philosophie<\/p>\n\n\n\n<p class=\"has-text-align-left\"><strong>1 : Trois grands processus, simul\u00e9s dans une boucle journali\u00e8re<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center has-background\" style=\"background-color:#d4f2ff\">\ud83d\udca7<br>Un bilan hydrique :<br>Approche r\u00e9servoirs<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center has-background\" style=\"background-color:#ffecbd\">\ud83c\udf24\ufe0f<br>Un bilan carbone :<br>Approche grande feuille<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center has-background\" style=\"background-color:#daffd5\">\ud83c\udf43<br>Un bilan ph\u00e9nologique :<br>Approche degr\u00e9-jour et photop\u00e9riodisme<\/p>\n<\/div>\n<\/div>\n\n\n\n<p class=\"has-text-align-left\"><strong>2 : Un jeu de donn\u00e9es en entr\u00e9e simple, permettant n\u00e9anmoins de multiples sc\u00e9narios de simulation<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center has-background\" style=\"background-color:#d4f2ff\">\u2614<br>Climat (contrainte)<br><br>Evapotranspiration<br>Temp\u00e9rature<br>Rayonnement<br>Pluviom\u00e9trie<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center has-background\" style=\"background-color:#ffecbd\">\ud83e\udeb1<br>Parcelle (sol) :<br><br>Typologie<br>Profondeur maximum<br>Profondeur du r\u00e9servoir de surface<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-text-align-center has-background\" style=\"background-color:#daffd5\">\ud83d\udc68\ud83c\udfff\u200d\ud83c\udf3e<br>Pratiques agricoles (strat\u00e9gie) :<br><br>Esp\u00e8ce, vari\u00e9t\u00e9<br>Date\/strat\u00e9gie de semis<br>Densit\u00e9 de semis<br>Irrigation<br>Niveau de fertilit\u00e9<\/p>\n<\/div>\n<\/div>\n\n\n\n<p><strong>3 : La strat\u00e9gie des 3 U <em>(utile, utilisable, utilis\u00e9)<\/em><\/strong> <\/p>\n\n\n\n<p>Le d\u00e9veloppement du mod\u00e8le SARRA s&rsquo;appuie sur un r\u00e9seau fort de <a href=\"http:\/\/partenaires\">partenaires du Nord et surtout du Sud<\/a>. Cela permet 1) de calibrer et valider la pertinence du mod\u00e8le en milieu tropical et progresser dans la conceptualisation des processus simul\u00e9s (composante <em>utile<\/em>), 2) d&rsquo;adapter les d\u00e9veloppements logiciels du mod\u00e8le \u00e0 son utilisation et ses utilisateurs (composante <em>utilisable<\/em>), et 3) d&rsquo;agir en \u00e9troite collaboration avec des organismes assurant la formation \u00e0 l&rsquo;utilisation de ces outils (composante <em>utilis\u00e9<\/em>).<\/p>\n\n\n\n<p>La mise en application de cette strat\u00e9gie a pour cons\u00e9quence que le mod\u00e8le SARRA :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Propose des outils et m\u00e9thodes privil\u00e9giant des approches simples, des relations robustes et mesurables, peu gourmandes en param\u00e8tres et donn\u00e9es d&rsquo;entr\u00e9es<\/li>\n\n\n\n<li>Soit bas\u00e9 sur des r\u00e9f\u00e9rences autant issues d&rsquo;essais en milieux contr\u00f4l\u00e9s que des suivis en milieu paysan<\/li>\n\n\n\n<li>Proposer de multiples <a href=\"https:\/\/sarra-h.teledetection.fr\/SARRAH_Scenario.html\">Sc\u00e9narios de simulation<\/a> permettant d&rsquo;appr\u00e9hender les strat\u00e9gies paysannes<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-default\"\/>\n\n\n\n<p class=\"has-text-align-center\">Les mod\u00e8les SARRA ont une diversit\u00e9 de domaines d&rsquo;applications<\/p>\n\n\n\n<p><strong>Analyse des risques climatiques de la parcelle \u00e0 la r\u00e9gion<\/strong> : impact de la variabilit\u00e9 et du changement climatique sur le rendement et la biomasse <em>(contexte de s\u00e9curit\u00e9 alimentaire)<\/em><\/p>\n\n\n\n<p><strong>Suivi de l&rsquo;\u00e9tat des cultures en cours de saison, pr\u00e9vision des rendements potentiels<\/strong> <em>(contexte de syst\u00e8me d&rsquo;alerte pr\u00e9coce)<\/em><\/p>\n\n\n\n<p><strong>Analyse de l&rsquo;adaptation de strat\u00e9gies paysannes \u00e0 leur environnement<\/strong> <em>(contexte de r\u00e9silience)<\/em> :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>adaptation des vari\u00e9t\u00e9s locales vs modernes <em>(photop\u00e9riodisme, r\u00e9partition des biomasses)<\/em><\/li>\n\n\n\n<li>adaptation des strat\u00e9gies de semis et estimation des risques <em>(semis pr\u00e9coces\/tardifs, simulation des dates de semis, mortalit\u00e9 juv\u00e9nile)<\/em><\/li>\n\n\n\n<li>strat\u00e9gie d&rsquo;autosubsistance ou d&rsquo;intensification <em>(vari\u00e9t\u00e9s, niveaux de fertilit\u00e9 d&rsquo;optimum \u00e0 tr\u00e8s faible)<\/em><\/li>\n\n\n\n<li>optimisation de la ressource en eau <em>(irrigation de compl\u00e9ment, observ\u00e9e, protocoles d&rsquo;irrigations)<\/em><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div class=\"wp-block-media-text alignwide is-stacked-on-mobile\" style=\"grid-template-columns:26% auto\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"512\" height=\"512\" src=\"https:\/\/sarra-h.teledetection.fr\/wp-content\/uploads\/2022\/10\/1093423613_a_scientist_in_a_cereal_field__in_a_sahelian_environment__illustration__high_quality-1.png\" alt=\"\" class=\"wp-image-104 size-full\" srcset=\"https:\/\/sarra-h.teledetection.fr\/wp-content\/uploads\/2022\/10\/1093423613_a_scientist_in_a_cereal_field__in_a_sahelian_environment__illustration__high_quality-1.png 512w, https:\/\/sarra-h.teledetection.fr\/wp-content\/uploads\/2022\/10\/1093423613_a_scientist_in_a_cereal_field__in_a_sahelian_environment__illustration__high_quality-1-300x300.png 300w, https:\/\/sarra-h.teledetection.fr\/wp-content\/uploads\/2022\/10\/1093423613_a_scientist_in_a_cereal_field__in_a_sahelian_environment__illustration__high_quality-1-150x150.png 150w\" sizes=\"auto, (max-width: 512px) 100vw, 512px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Supporte_par_plus_de_30_ans_de_recherches\"><\/span>Support\u00e9 par plus de 30 ans de recherches<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Les mod\u00e8les SARRA sont issus d&rsquo;une longue histoire de travaux de recherches en agroclimatologie de l&rsquo;Afrique de l&rsquo;Ouest.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/sarra-h.teledetection.fr\/?page_id=11\">En savoir plus sur l&rsquo;histoire des mod\u00e8les<\/a><\/div>\n<\/div>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.zotero.org\/groups\/5369680\/prj_sarra_cropmodels\/library\" target=\"_blank\" rel=\"noreferrer noopener\">Voir la liste de publications<\/a><\/div>\n<\/div>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Les mod\u00e8les de simulation de cultures SARRA sont particuli\u00e8rement adapt\u00e9s \u00e0 l&rsquo;analyse d&rsquo;impact du climat sur la croissance des c\u00e9r\u00e9ales s\u00e8ches et du rendement potentiel en milieu tropical : mil, sorgho, ma\u00efs et riz pluvial. Les mod\u00e8les SARRA sont modulaires, d\u00e9terministes, bas\u00e9s sur des relations simples et robustes. Ils permettent de simuler des strat\u00e9gies paysannes, &#8230; <a title=\"\" class=\"read-more\" href=\"https:\/\/sarra-h.teledetection.fr\/\" aria-label=\"En savoir plus sur \">Lire la suite<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-7","page","type-page","status-publish"],"_links":{"self":[{"href":"https:\/\/sarra-h.teledetection.fr\/index.php?rest_route=\/wp\/v2\/pages\/7","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sarra-h.teledetection.fr\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sarra-h.teledetection.fr\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sarra-h.teledetection.fr\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/sarra-h.teledetection.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7"}],"version-history":[{"count":48,"href":"https:\/\/sarra-h.teledetection.fr\/index.php?rest_route=\/wp\/v2\/pages\/7\/revisions"}],"predecessor-version":[{"id":232,"href":"https:\/\/sarra-h.teledetection.fr\/index.php?rest_route=\/wp\/v2\/pages\/7\/revisions\/232"}],"wp:attachment":[{"href":"https:\/\/sarra-h.teledetection.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}