{"id":5089,"date":"2024-08-27T13:05:24","date_gmt":"2024-08-27T11:05:24","guid":{"rendered":"https:\/\/normandiemaine.cerfrance.fr\/latelier\/?p=5089"},"modified":"2025-06-16T10:28:27","modified_gmt":"2025-06-16T08:28:27","slug":"de-la-fourche-a-la-fourchette-aout-2024","status":"publish","type":"post","link":"https:\/\/normandiemaine.cerfrance.fr\/latelier\/de-la-fourche-a-la-fourchette-aout-2024\/","title":{"rendered":"De la fourche \u00e0 la fourchette | ao\u00fbt 2024"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">De la fourche \u00e0 la fourchette d&rsquo;ao\u00fbt 2024\u00a0: \u00e9leveurs et \u00e9missions de GES, consommation alimentaire des m\u00e9nages, d\u00e9l\u00e9gation de travaux dans les exploitations, la ressource en eau<\/h1>\n\n\n\n<p class=\"has-medium-font-size\">D\u00e9couvrez la derni\u00e8re publication de la fourche \u00e0 la fourchette du mois d&rsquo;ao\u00fbt 2024 sur les th\u00e9matiques suivantes :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-medium-font-size\">Accompagner les \u00e9leveurs vers la <strong>r\u00e9duction de leur empreinte carbone<\/strong><\/li>\n\n\n\n<li class=\"has-medium-font-size\">En 2023, la <strong>consommation alimentaire des m\u00e9nages<\/strong> ralentit \u00e0 nouveau<\/li>\n\n\n\n<li class=\"has-medium-font-size\"><strong>Toujours plus de d\u00e9l\u00e9gation de travaux<\/strong> \u00e0 l\u2019\u00e9chelle des exploitations <\/li>\n\n\n\n<li class=\"has-medium-font-size\">Quantification de <strong>la ressource en eau<\/strong> et de ses usages en France<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-align-right has-luminous-vivid-orange-color has-text-color has-link-color has-small-font-size wp-elements-c63980fdb49e1b3b815b27f9ea052fe7\">R\u00e9daction : Pierre CHAMBARD<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Accompagner les \u00e9leveurs vers la r\u00e9duction des \u00e9missions de GES<\/h2>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">La Strat\u00e9gie Nationale Bas-Carbone<\/h3>\n\n\n\n<p>Une mission a \u00e9t\u00e9 confi\u00e9e au <a href=\"https:\/\/agriculture.gouv.fr\/parangonnage-sur-la-diminution-des-emissions-de-methane-de-lelevage\">CGAAER <\/a>(Conseil g\u00e9n\u00e9ral de l&rsquo;alimentation, de l&rsquo;agriculture et des espaces ruraux) dans un <strong>objectif d\u2019analyse des politiques de r\u00e9duction des \u00e9missions de m\u00e9thane par l\u2019\u00e9levage dans des pays o\u00f9 le m\u00e9thane constitue l\u2019un des principaux gaz \u00e0 effet de serre (GES) \u00e9mis<\/strong>.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>En effet, le m\u00e9thane est un gaz \u00e0 tr\u00e8s fort pouvoir r\u00e9chauffant puisqu\u2019<strong>une tonne de ce gaz peut \u00eatre consid\u00e9r\u00e9e comme \u00e9quivalente \u00e0 28 tonnes de CO<sub>2<\/sub><\/strong><sub> <\/sub>si l\u2019on consid\u00e8re son impact sur 100 ans. Sa dur\u00e9e de vie dans l\u2019atmosph\u00e8re est d&rsquo;environ 12 ans avant de se transformer en CO<sub>2<\/sub>.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-media-text has-media-on-the-right is-stacked-on-mobile\"><div class=\"wp-block-media-text__content\">\n<p>En France, <strong>la Strat\u00e9gie Nationale Bas-Carbone vise \u00e0 limiter les \u00e9missions de m\u00e9thane.<\/strong> Ses pr\u00e9conisations sont bas\u00e9es sur la gestion des effluents d&rsquo;\u00e9levage et leur m\u00e9thanisation pour toutes les esp\u00e8ces animales. <\/p>\n\n\n\n<p>Pour <strong>les ruminants, principaux \u00e9metteurs de m\u00e9thane en France<\/strong>, il s\u2019agit aussi de r\u00e9duire leurs p\u00e9riodes improductives, et de limiter leur fermentation ent\u00e9rique.<\/p>\n<\/div><figure class=\"wp-block-media-text__media\"><img data-recalc-dims=\"1\" fetchpriority=\"high\" decoding=\"async\" width=\"372\" height=\"185\" src=\"https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/latelier\/wp-content\/uploads\/sites\/2\/2024\/08\/origine-des-emissions-natioanles-2022-de-methane-du-secteur-agriculture-et-syviculture.png?resize=372%2C185&#038;ssl=1\" alt=\"Origine des \u00e9missions nationales 2022 de m\u00e9thane du secteur agriculture et sylviculture, d'apr\u00e8s CIPTEPA - Avril 2023\" class=\"wp-image-5090 size-full\" srcset=\"https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/latelier\/wp-content\/uploads\/sites\/2\/2024\/08\/origine-des-emissions-natioanles-2022-de-methane-du-secteur-agriculture-et-syviculture.png?w=372&amp;ssl=1 372w, https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/latelier\/wp-content\/uploads\/sites\/2\/2024\/08\/origine-des-emissions-natioanles-2022-de-methane-du-secteur-agriculture-et-syviculture.png?resize=300%2C149&amp;ssl=1 300w\" sizes=\"(max-width: 372px) 100vw, 372px\" \/><\/figure><\/div>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">L&rsquo;analyse du CGAAER <\/h3>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-media-text is-stacked-on-mobile\"><figure class=\"wp-block-media-text__media\"><img data-recalc-dims=\"1\" decoding=\"async\" width=\"476\" height=\"297\" src=\"https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/latelier\/wp-content\/uploads\/sites\/2\/2024\/08\/part-du-methane-enterique-et-des-effluents-dans-les-emissions-du-secteur-agricole.png?resize=476%2C297&#038;ssl=1\" alt=\"Part du m\u00e9thane ent\u00e9rique et des effluents dans les \u00e9missions du secteur agricole\" class=\"wp-image-5091 size-full\" srcset=\"https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/latelier\/wp-content\/uploads\/sites\/2\/2024\/08\/part-du-methane-enterique-et-des-effluents-dans-les-emissions-du-secteur-agricole.png?w=476&amp;ssl=1 476w, https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/latelier\/wp-content\/uploads\/sites\/2\/2024\/08\/part-du-methane-enterique-et-des-effluents-dans-les-emissions-du-secteur-agricole.png?resize=300%2C187&amp;ssl=1 300w\" sizes=\"(max-width: 476px) 100vw, 476px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<p>Les pays cibl\u00e9s pour l\u2019analyse du CGAAER sont les Pays-Bas, le Danemark, l\u2019Allemagne, l\u2019Irlande, les \u00c9tats-Unis, la Nouvelle-Z\u00e9lande, l\u2019Australie et le Br\u00e9sil. <\/p>\n\n\n\n<p>L\u2019analyse a permis de constater que pour ces pays, <strong>leur motivation est souvent double : <\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>atteindre les objectifs nationaux<\/strong>, le plus souvent non contraignants, de r\u00e9duction de m\u00e9thane provenant de l\u2019\u00e9levage, <\/li>\n\n\n\n<li><strong>afficher \u00e0 l\u2019exportation la performance environnementale du lait<\/strong>, des produits laitiers et de la viande. <\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<p>\u00c0 l\u2019instar des Pays-Bas, dans certains pays \u00e0 fortes densit\u00e9s d\u2019animaux, des <strong>politiques de r\u00e9duction du cheptel ont \u00e9t\u00e9 mises en place<\/strong>. Mais ces politiques sont co\u00fbteuses et lentes, du fait de leur caract\u00e8re volontaire.&nbsp; <\/p>\n\n\n\n<p><strong>Pour des raisons d\u2019acceptabilit\u00e9 et de fragilit\u00e9 du mod\u00e8le \u00e9conomique<\/strong> de l\u2019\u00e9levage en France, il ne para\u00eet donc pas envisageable aux auteurs du CGAAER de mettre en place des dispositifs r\u00e9glementaires ou financiers contraignant les \u00e9leveurs \u00e0 diminuer les \u00e9missions de m\u00e9thane de leur cheptel. Le d\u00e9ploiement des techniques (comme l\u2019ajout d\u2019additifs alimentaires \u00e0 la ration des vaches) ne se fera qu\u2019\u00e0 la condition que le march\u00e9 r\u00e9mun\u00e8re les productions certifi\u00e9es \u00ab\u00a0bas-carbone\u00a0\u00bb. L\u2019obligation de prise en compte des \u00e9missions de m\u00e9thane dans les achats des entreprises du secteur agroalimentaire soumises au \u00ab\u00a0bilan carbone\u00a0\u00bb ou les paiements pour services environnementaux, int\u00e9grant la r\u00e9duction des \u00e9missions de m\u00e9thane, pourront y contribuer.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">En 2023, la consommation alimentaire des m\u00e9nages ralentit \u00e0 nouveau<\/h2>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>L\u2019ann\u00e9e 2023 s\u2019est caract\u00e9ris\u00e9e par une forte inflation<\/strong> (+\u00a07,1\u00a0% en moyenne annuelle), notamment sur les produits alimentaires (+\u00a012,1\u00a0%). Cette augmentation des prix a conduit \u00e0 une<strong> diminution de la consommation alimentaire des m\u00e9nages fran\u00e7ais de 3,2\u00a0% en volume<\/strong>. Elle fait suite \u00e0 une premi\u00e8re baisse des volumes consomm\u00e9s en 2022 (-\u00a02,5\u00a0%) avec la reprise de la restauration hors domicile et la r\u00e9duction du t\u00e9l\u00e9travail.<\/p>\n\n\n\n<p><strong>La baisse de la consommation alimentaire des m\u00e9nages s\u2019est traduite par une r\u00e9duction des quantit\u00e9s consomm\u00e9es, mais aussi par des changements dans la qualit\u00e9 des produits consomm\u00e9s <\/strong>(recours plus fr\u00e9quent \u00e0 des produits d\u2018entr\u00e9e de gamme) <strong>et dans la fa\u00e7on de les consommer<\/strong> (d\u00e9veloppement du e-commerce).<\/p>\n\n\n\n<p>Presque toutes les cat\u00e9gories de produits alimentaires sont concern\u00e9es par cette baisse de consommation. A l\u2019exception des pains et des c\u00e9r\u00e9ales dont la consommation se stabilise. Les volumes de viande sont quant \u00e0 eux fortement impact\u00e9s (-\u00a04,1\u00a0%).<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\" rowspan=\"2\"><\/td><td class=\"has-text-align-center\" data-align=\"center\" colspan=\"4\"><strong>\u00c9volution en volume (en&nbsp;%)<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\" colspan=\"4\"><strong>\u00c9volution en prix (en&nbsp;%)<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>2020<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>2021<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>2022<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>2023<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>2020<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>2021<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>2022<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>2023<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Produits alimentaires, dont&nbsp;:<\/td><td class=\"has-text-align-center\" data-align=\"center\">3,9<\/td><td class=\"has-text-align-center\" data-align=\"center\">-0,4<\/td><td class=\"has-text-align-center\" data-align=\"center\">-2,5<\/td><td class=\"has-text-align-center\" data-align=\"center\">-3,2<\/td><td class=\"has-text-align-center\" data-align=\"center\">2,1<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,6<\/td><td class=\"has-text-align-center\" data-align=\"center\">7,2<\/td><td class=\"has-text-align-center\" data-align=\"center\">12,1<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Pains et c\u00e9r\u00e9ales<\/td><td class=\"has-text-align-center\" data-align=\"center\">1,0<\/td><td class=\"has-text-align-center\" data-align=\"center\">7,0<\/td><td class=\"has-text-align-center\" data-align=\"center\">1,6<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,0<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,8<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,4<\/td><td class=\"has-text-align-center\" data-align=\"center\">7,2<\/td><td class=\"has-text-align-center\" data-align=\"center\">11,5<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Viandes<\/td><td class=\"has-text-align-center\" data-align=\"center\">5,2<\/td><td class=\"has-text-align-center\" data-align=\"center\">-4,5<\/td><td class=\"has-text-align-center\" data-align=\"center\">-6,3<\/td><td class=\"has-text-align-center\" data-align=\"center\">-4,1<\/td><td class=\"has-text-align-center\" data-align=\"center\">3,1<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,9<\/td><td class=\"has-text-align-center\" data-align=\"center\">7,9<\/td><td class=\"has-text-align-center\" data-align=\"center\">10,6<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Poissons et crustac\u00e9s<\/td><td class=\"has-text-align-center\" data-align=\"center\">3,3<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,3<\/td><td class=\"has-text-align-center\" data-align=\"center\">-12,6<\/td><td class=\"has-text-align-center\" data-align=\"center\">-8,3<\/td><td class=\"has-text-align-center\" data-align=\"center\">3,1<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,4<\/td><td class=\"has-text-align-center\" data-align=\"center\">9,5<\/td><td class=\"has-text-align-center\" data-align=\"center\">9,0<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">L\u00e9gumes<\/td><td class=\"has-text-align-center\" data-align=\"center\">3,4<\/td><td class=\"has-text-align-center\" data-align=\"center\">-2,6<\/td><td class=\"has-text-align-center\" data-align=\"center\">-4,6<\/td><td class=\"has-text-align-center\" data-align=\"center\">-5,4<\/td><td class=\"has-text-align-center\" data-align=\"center\">4,1<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,3<\/td><td class=\"has-text-align-center\" data-align=\"center\">8,7<\/td><td class=\"has-text-align-center\" data-align=\"center\">14,2<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Boissons non alcoolis\u00e9es<\/td><td class=\"has-text-align-center\" data-align=\"center\">3,0<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,5<\/td><td class=\"has-text-align-center\" data-align=\"center\">1,8<\/td><td class=\"has-text-align-center\" data-align=\"center\">-4,3<\/td><td class=\"has-text-align-center\" data-align=\"center\">-0,1<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,0<\/td><td class=\"has-text-align-center\" data-align=\"center\">5,6<\/td><td class=\"has-text-align-center\" data-align=\"center\">11,7<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\"><em>\u00c9volution de la consommation des m\u00e9nages en produits alimentaires et boissons non alcoolis\u00e9es<\/em>. D\u2019apr\u00e8s <a href=\"https:\/\/www.agra.fr\/agra-presse\/sites\/agra-presse\/files\/2024-07\/ip2002.pdf\">INSEE<\/a>, comptes nationaux, base 2020<\/figcaption><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>Globalement, <strong>les d\u00e9penses en volume des m\u00e9nages fran\u00e7ais<\/strong> (pas seulement en produits alimentaires)<strong> restent inf\u00e9rieures de 3,1\u00a0% en 2023<\/strong> de leur tendance d\u2019avant crise COVID. Les derniers chiffres de juin 2024 r\u00e9v\u00e9l\u00e9s par <a href=\"https:\/\/insights.circana.com\/rapports-publications\/circana-le-mensuel-juin-2024\">Circana<\/a> confirment globalement ces tendances.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Toujours plus de d\u00e9l\u00e9gation de travaux \u00e0 l\u2019\u00e9chelle des exploitations<\/h2>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">56 % des exploitations ont recours \u00e0 la d\u00e9l\u00e9gation<\/h3>\n\n\n\n<p>Le <a href=\"https:\/\/agreste.agriculture.gouv.fr\/agreste-web\/download\/publication\/publie\/Pri2211\/Primeur%202022-11_RA_%20Main-d'oeuvre%20et%20externalisation.pdf\">recensement agricole 2020<\/a> avait confirm\u00e9 que <strong>les agriculteurs faisaient de plus en plus souvent appel \u00e0 des prestataires ext\u00e9rieurs <\/strong>(CUMA ou ETA) pour leur d\u00e9l\u00e9guer certains travaux. <strong>56\u00a0% des exploitations avaient recours \u00e0 ces services<\/strong>, portant principalement sur tout ou partie des travaux des champs. Seulement 7\u00a0% des exploitations d\u00e9claraient les utiliser pour des actes techniques relatifs \u00e0 leur atelier d\u2019\u00e9levage. Mais c\u2019\u00e9taient les \u00e9leveurs laitiers (85\u00a0% d\u2019entre eux) qui faisaient le plus appel \u00e0 la d\u00e9l\u00e9gation de travaux, notamment dans les plus grandes exploitations.<\/p>\n\n\n\n<p><strong>Certains agriculteurs font de la d\u00e9l\u00e9gation int\u00e9grale <\/strong>(du semis \u00e0 la r\u00e9colte, voire les d\u00e9cisions agronomiques, jusqu\u2019aux d\u00e9cisions \u00e9conomiques). D\u2019apr\u00e8s une enqu\u00eate de MDA cit\u00e9e par <a href=\"https:\/\/www.reussir.fr\/grandes-cultures\/delegation-de-travaux-la-prestation-complete-progresse-mais-reste-la-marge\">R\u00e9ussir<\/a>, <strong>50\u00a0% des ETA interrog\u00e9es r\u00e9alisent des prestations compl\u00e8tes, contre 34\u00a0% en 2013<\/strong>, consid\u00e9rant que cette activit\u00e9 va encore progresser. Le sociologue Fran\u00e7ois Purseigle estime, quant \u00e0 lui, que \u00ab\u00a0les donn\u00e9es du recensement minimisent largement ces pratiques\u00a0\u00bb et que, dans certaines r\u00e9gions, 18\u00a0% des fermes pratiquent la d\u00e9l\u00e9gation int\u00e9grale (toutes productions confondues).<\/p>\n\n\n\n<p><strong>Manque de main-d\u2019\u0153uvre, astreinte de l\u2019\u00e9levage, choix de consacrer son temps \u00e0 une activit\u00e9 de diversification, absence de repreneur, logique patrimoniale<\/strong> (je conserve la ferme familiale mais je ne veux pas l\u2019exploiter moi-m\u00eame) <strong>ou logique \u00e9conomique <\/strong>(co\u00fbt et d\u00e9bit de chantier plus favorables chez le prestataire) sont autant de <a href=\"https:\/\/www.ouest-france.fr\/economie\/agriculture\/elevage\/agriculture-pourquoi-de-plus-en-plus-deleveurs-deleguent-100-pourcent-de-leurs-cultures-344724e0-da46-11ee-99ae-ccd25b6a9d42\">raisons qui motivent la d\u00e9l\u00e9gation de travaux<\/a>.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Les formes de d\u00e9l\u00e9gation<\/h3>\n\n\n\n<p><\/p>\n\n\n\n<p>A l\u2019instar des ETA ou des CUMA, des entreprises priv\u00e9es de gestion pour compte et des coop\u00e9ratives (comme Euralis ou Noriap) proposent des offres de d\u00e9l\u00e9gation sur les cultures. Plus r\u00e9cemment, c\u2019est <a href=\"https:\/\/www.reussir.fr\/exploitations-agricoles-invivo-cree-un-service-dassistance-la-gestion-la-confederation-paysanne-et\">InVivo<\/a> qui a annonc\u00e9 la cr\u00e9ation d\u2019un service d\u2019assistance \u00e0 la gestion d\u2019exploitations agricoles.<\/p>\n\n\n\n<p><strong>Si cette forme de d\u00e9l\u00e9gation interroge certains agriculteurs, qui d\u00e9noncent une forme d\u2019int\u00e9gration des exploitations par l\u2019aval ou l\u2019amont, elle peut r\u00e9pondre aux besoins d\u2019exploitants sans successeur et \u00e0 des op\u00e9rateurs \u00e9conomiques soucieux de pr\u00e9server leurs ventes ou leurs approvisionnements.<\/strong><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quantification de la ressource en eau et de ses usages en France<\/h2>\n\n\n\n<p><\/p>\n\n\n\n<p>Une note produite par <a href=\"https:\/\/www.strategie.gouv.fr\/publications\/prelevements-consommations-deau-enjeux-usages\">France Strat\u00e9gie<\/a>, en avril 2024, d\u00e9crit les pr\u00e9l\u00e8vements et les consommations d\u2019eau, selon leurs usages, au niveau des sept grands bassins versants fran\u00e7ais. \u00a0<strong>Elle a pour objectif de clarifier les termes du d\u00e9bat dans le contexte des tensions croissantes sur la disponibilit\u00e9 en eau, en lien avec le changement climatique.<\/strong><\/p>\n\n\n\n<p><strong>L\u2019eau utilisable par les \u00e9cosyst\u00e8mes et par les activit\u00e9s humaines en France repr\u00e9sente 40\u00a0% des pr\u00e9cipitations, et l\u2019\u00e9vapotranspiration 60\u00a0%<\/strong>. Si la quantit\u00e9 d\u2019eau sur Terre est constante. Le volume d\u2019eau renouvelable, et donc utilisable, est en diminution en France de 14\u00a0% entre les p\u00e9riodes 1999-2001 et 2002-2018,  essentiellement du fait de la baisse des pr\u00e9cipitations li\u00e9e au changement climatique.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Qui pr\u00e9l\u00e8ve et pour quels usages\u00a0?<\/h3>\n\n\n\n<p><strong>Les pr\u00e9l\u00e8vements d\u2019eau correspondent aux volumes d\u2019eau douce extraits temporairement ou d\u00e9finitivement des eaux de surface<\/strong> :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>lacs et rivi\u00e8res pour 82\u00a0% ; <\/li>\n\n\n\n<li>des eaux souterraines pour 18\u00a0%. <\/li>\n<\/ul>\n\n\n\n<p>Ils repr\u00e9sentent annuellement environ <strong>6\u00a0% des pr\u00e9cipitations et 15\u00a0% de l\u2019eau utilisable<\/strong>, c\u2019est relativement peu. Mais cela peut masquer des pourcentages beaucoup plus \u00e9lev\u00e9s dans certains territoires ou des tensions sur la ressource en p\u00e9riode estivale.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" decoding=\"async\" width=\"319\" height=\"580\" data-id=\"5093\" src=\"https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/latelier\/wp-content\/uploads\/sites\/2\/2024\/08\/Prelevement-dans-les-sept-bassins-versants-hydrographiques-de-France-hexagonale-et-de-corse-en-2020.png?resize=319%2C580&#038;ssl=1\" alt=\"\" class=\"wp-image-5093\" srcset=\"https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/latelier\/wp-content\/uploads\/sites\/2\/2024\/08\/Prelevement-dans-les-sept-bassins-versants-hydrographiques-de-France-hexagonale-et-de-corse-en-2020.png?w=319&amp;ssl=1 319w, https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/latelier\/wp-content\/uploads\/sites\/2\/2024\/08\/Prelevement-dans-les-sept-bassins-versants-hydrographiques-de-France-hexagonale-et-de-corse-en-2020.png?resize=165%2C300&amp;ssl=1 165w\" sizes=\"(max-width: 319px) 100vw, 319px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full has-custom-border\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"301\" height=\"498\" data-id=\"5092\" src=\"https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/latelier\/wp-content\/uploads\/sites\/2\/2024\/08\/consommations-dans-les-sept-basins-versants-hydrographiques-de-france-hexagonale-et-de-corse-en-2020.png?resize=301%2C498&#038;ssl=1\" alt=\"\" class=\"wp-image-5092\" style=\"border-style:none;border-width:0px\" srcset=\"https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/latelier\/wp-content\/uploads\/sites\/2\/2024\/08\/consommations-dans-les-sept-basins-versants-hydrographiques-de-france-hexagonale-et-de-corse-en-2020.png?w=301&amp;ssl=1 301w, https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/latelier\/wp-content\/uploads\/sites\/2\/2024\/08\/consommations-dans-les-sept-basins-versants-hydrographiques-de-france-hexagonale-et-de-corse-en-2020.png?resize=181%2C300&amp;ssl=1 181w\" sizes=\"(max-width: 301px) 100vw, 301px\" \/><\/figure>\n<\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>L\u2019agriculture repr\u00e9sente en moyenne 11\u00a0% de ces pr\u00e9l\u00e8vements d\u2019eau<\/strong>, loin derri\u00e8re les 47\u00a0% d\u00e9volus au secteur de l\u2019\u00e9nergie (refroidissement des centrales nucl\u00e9aires). Les pr\u00e9l\u00e8vements agricoles sont <strong>essentiellement li\u00e9s \u00e0 l\u2019irrigation<\/strong>. France Strat\u00e9gie estime<strong> l\u2019eau d\u2019abreuvement des animaux ou servant au nettoyage des b\u00e2timents d\u2019\u00e9levage \u00e0 moins de 1\u00a0% des pr\u00e9l\u00e8vements agricoles<\/strong>. <\/p>\n\n\n\n<p>Les quantit\u00e9s d\u2019eau pr\u00e9lev\u00e9es pour l\u2019irrigation varient selon :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>les bassins versants<\/strong>. Le bassin Loire \u2013 Bretagne dispose des surfaces irrigu\u00e9es les plus grandes ;<\/li>\n\n\n\n<li><strong>la nature des cultures irrigu\u00e9es<\/strong>. Par unit\u00e9 de surface, les l\u00e9gumes, les vergers, le soja, le ma\u00efs et les pommes de terre sont les cultures qui demandent le plus d\u2019eau. <\/li>\n<\/ul>\n\n\n\n<p>Dans tous les bassins, la part d\u2019exploitations et les surfaces \u00e9quip\u00e9es pour l\u2019irrigation augmentent. Mais, c\u2019est dans le nord de la France que leur d\u00e9veloppement est le plus marqu\u00e9.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Distinguer pr\u00e9l\u00e8vement et consommation<\/h3>\n\n\n\n<p><strong>La consommation d\u2019eau correspond \u00e0 la partie du pr\u00e9l\u00e8vement qui ne retourne pas directement \u00e0 la ressource mobilisable. <\/strong>L\u2019eau consomm\u00e9e est celle qui est soit \u00e9vapotranspir\u00e9e apr\u00e8s pr\u00e9l\u00e8vement, soit incorpor\u00e9e (par l\u2019Homme ou dans des produits). <strong>En France, quatre grands secteurs sont consommateurs d\u2019eau\u00a0:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>l\u2019<strong>industrie et la construction<\/strong> (9\u00a0%) ;<\/li>\n\n\n\n<li>le <strong>secteur domestique<\/strong> pour l\u2019eau potable (16\u00a0%) ; <\/li>\n\n\n\n<li>l\u2019<strong>\u00e9nergie<\/strong> (14\u00a0%) ;<\/li>\n\n\n\n<li>l\u2019<strong>agriculture<\/strong> (62\u00a0%). <\/li>\n<\/ul>\n\n\n\n<p><strong>Les consommations en eau pour l\u2019agriculture sont particuli\u00e8rement \u00e9lev\u00e9es dans les bassins Adour-Garonne, Rh\u00f4ne-M\u00e9diterran\u00e9e et Loire-Bretagne<\/strong>. Il s&rsquo;agit des bassins les plus irrigu\u00e9s. Aussi, les consommations en eau de juin \u00e0 ao\u00fbt repr\u00e9senteraient 60\u00a0% du total annuel. Alors que, dans le m\u00eame temps, l\u2019eau douce qui transite dans les cours d\u2019eau correspond \u00e0 seulement 15\u00a0% du volume annuel.<\/p>\n\n\n\n<p><strong>Dans le contexte du changement climatique, il est important d\u2019identifier les territoires et les p\u00e9riodes o\u00f9 les conflits d\u2019usage peuvent apparaitre.<\/strong> Le caract\u00e8re localis\u00e9 de la demande en eau, la quantit\u00e9 de la ressource disponible et leurs variations au cours de l\u2019ann\u00e9e doivent \u00eatre pris en compte dans les diff\u00e9rents sc\u00e9narii d\u2019usage de l\u2019eau. \u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Eleveurs et \u00e9missions de GES, consommation alimentaire, d\u00e9l\u00e9gation de travaux par les exploitations, ressource en eau<\/p>\n","protected":false},"author":4,"featured_media":5094,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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