{"id":339,"date":"2019-04-21T23:08:36","date_gmt":"2019-04-21T21:08:36","guid":{"rendered":"http:\/\/grand-morin.fr\/?p=339"},"modified":"2019-05-10T21:28:04","modified_gmt":"2019-05-10T19:28:04","slug":"la-confluence-avec-la-marne","status":"publish","type":"post","link":"https:\/\/grand-morin.fr\/index.php\/2019\/04\/21\/la-confluence-avec-la-marne\/","title":{"rendered":"La confluence avec la Marne"},"content":{"rendered":"\n<div align=\"justify\">Le Grand-Morin se jette dans la Marne par deux bras. Le bras gauche \u00e0 Esbly et le bras droit \u00e0 Cond\u00e9.<br>\nLe bras droit est de nos jours pr\u00e9sent\u00e9 comme le principal, dans la mesure o\u00f9 l\u2019essentiel du d\u00e9bit passe par lui, mais cela n\u2019a pas toujours \u00e9t\u00e9 le cas. La carte de Cassini (18\u00e8me si\u00e8cle) ne diff\u00e9rencie pas les 2 bras en importance.\n<br>\n<div align=\"center\"><figure class=\"wp-block-image\"><img loading=\"lazy\" width=\"617\" height=\"518\" src=\"http:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/04\/conde1.jpg\" alt=\"\" class=\"wp-image-347\" srcset=\"https:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/04\/conde1.jpg 617w, https:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/04\/conde1-300x252.jpg 300w\" sizes=\"(max-width: 617px) 100vw, 617px\" \/><\/figure><\/div>\n<br>\nSur la carte d\u2019\u00e9tat-major (1\u00e8re moiti\u00e9 du 19\u00e8me si\u00e8cle) on voit le canal de Chalifert qui alors s\u2019arr\u00eatait \u00e0 Cond\u00e9 en rejoignant le Grand-Morin.<br>\n<div align=\"center\"><figure class=\"wp-block-image\"><img loading=\"lazy\" width=\"655\" height=\"521\" src=\"http:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/04\/conde2.jpg\" alt=\"\" class=\"wp-image-348\" srcset=\"https:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/04\/conde2.jpg 655w, https:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/04\/conde2-300x239.jpg 300w\" sizes=\"(max-width: 655px) 100vw, 655px\" \/><\/figure>\n<figure class=\"wp-block-image\"><img loading=\"lazy\" width=\"1024\" height=\"683\" src=\"http:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/04\/conde12-1024x683.jpg\" alt=\"\" class=\"wp-image-345\" srcset=\"https:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/04\/conde12-1024x683.jpg 1024w, https:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/04\/conde12-300x200.jpg 300w, https:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/04\/conde12-768x512.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\nProbable emplacement du lit du Grand-Morin avant qu&rsquo;il soit d\u00e9tourn\u00e9 (entre la porte \u00e0 bateaux et le canal) <br>\n<br>\nSur le trac\u00e9 moderne (carte de 1889), apr\u00e8s prolongation du canal de Chalifert jusqu\u2019\u00e0 Meaux, on voit que celui-ci emprunte l\u2019ancien trac\u00e9 du bras droit du Grand-Morin, qui lui a \u00e9t\u00e9 d\u00e9plac\u00e9. <br>\n<div align=\"center\"><figure class=\"wp-block-image\"><img loading=\"lazy\" width=\"881\" height=\"584\" src=\"http:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/04\/conde3.jpg\" alt=\"\" class=\"wp-image-349\" srcset=\"https:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/04\/conde3.jpg 881w, https:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/04\/conde3-300x199.jpg 300w, https:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/04\/conde3-768x509.jpg 768w\" sizes=\"(max-width: 881px) 100vw, 881px\" \/><\/figure><\/div>\n<br>\nLe nouveau trac\u00e9 passe plus au sud et r\u00e9alise un coude pour passer sous le canal via le pont \u00e0 arches. Ce trac\u00e9 artificiel n\u2019est pas sans cons\u00e9quences sur le probl\u00e8me des inondations \u00e0 Cond\u00e9 ! La pente est faible, les arches pr\u00e9sentent un obstacle, la confluence a tendance \u00e0 s\u2019enliser, le canal constitue un obstacle \u00e0 l\u2019\u00e9talement des crues. \n<br>\n<div align=\"center\"><figure class=\"wp-block-image\"><img loading=\"lazy\" width=\"1024\" height=\"683\" src=\"http:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/04\/conde11-1024x683.jpg\" alt=\"\" class=\"wp-image-344\" srcset=\"https:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/04\/conde11-1024x683.jpg 1024w, https:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/04\/conde11-300x200.jpg 300w, https:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/04\/conde11-768x512.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\nLe canal de Chalifert \u00e0 Cond\u00e9.<\/div>\n<br> \n<div align=\"center\"><figure class=\"wp-block-image\"><img loading=\"lazy\" width=\"1024\" height=\"683\" src=\"http:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/03\/DSC_1069-1024x683.jpg\" alt=\"\" class=\"wp-image-228\" srcset=\"https:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/03\/DSC_1069-1024x683.jpg 1024w, https:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/03\/DSC_1069-300x200.jpg 300w, https:\/\/grand-morin.fr\/wp-content\/uploads\/2019\/03\/DSC_1069-768x512.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\nLe pont canal o\u00f9 le bras droit passe sous le canal de Chalifert avant de se jeter dans la Marne.<\/div>\n<br>\nA noter que les crues du Grand-Morin sont g\u00e9n\u00e9ralement plus rapides que celles de la Marne, ce qui permet dans ce cas aux eaux du Grand-Morin de s&rsquo;\u00e9vacuer avant la crue de la Marne. Cependant quand les 2 rivi\u00e8res sont en crues en m\u00eame temps dans ce secteur, Cond\u00e9 est inond\u00e9, les eaux ne pouvant trouver de zone d&rsquo;\u00e9tale naturelle.<br>\n<br>\nDe son c\u00f4t\u00e9, le bras gauche passant par les zones urbanis\u00e9es de Esbly est presque canalis\u00e9 dans ce secteur et ne supporte qu\u2019un d\u00e9bit limit\u00e9 et aucune zone de d\u00e9bordement. (cartes : Etude SEGI pour le syndicat)<\/div>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le Grand-Morin se jette dans la Marne par deux bras. Le bras gauche \u00e0 Esbly et le bras droit \u00e0 Cond\u00e9. Des trac\u00e9s qui ont \u00e9volu\u00e9 au cours des si\u00e8cles et expliquent les crues \u00e0 Cond\u00e9.<\/p>\n","protected":false},"author":1,"featured_media":228,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[6],"tags":[],"_links":{"self":[{"href":"https:\/\/grand-morin.fr\/index.php\/wp-json\/wp\/v2\/posts\/339"}],"collection":[{"href":"https:\/\/grand-morin.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/grand-morin.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/grand-morin.fr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/grand-morin.fr\/index.php\/wp-json\/wp\/v2\/comments?post=339"}],"version-history":[{"count":15,"href":"https:\/\/grand-morin.fr\/index.php\/wp-json\/wp\/v2\/posts\/339\/revisions"}],"predecessor-version":[{"id":376,"href":"https:\/\/grand-morin.fr\/index.php\/wp-json\/wp\/v2\/posts\/339\/revisions\/376"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/grand-morin.fr\/index.php\/wp-json\/wp\/v2\/media\/228"}],"wp:attachment":[{"href":"https:\/\/grand-morin.fr\/index.php\/wp-json\/wp\/v2\/media?parent=339"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/grand-morin.fr\/index.php\/wp-json\/wp\/v2\/categories?post=339"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/grand-morin.fr\/index.php\/wp-json\/wp\/v2\/tags?post=339"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}