{"id":12072,"date":"2026-03-09T20:33:36","date_gmt":"2026-03-09T19:33:36","guid":{"rendered":"https:\/\/kenya4u.com\/?p=12072"},"modified":"2026-03-09T20:33:38","modified_gmt":"2026-03-09T19:33:38","slug":"nairobi-sous-leau-ce-que-les-inondations-de-vendredi-revelent-vraiment","status":"publish","type":"post","link":"https:\/\/kenya4u.com\/en\/nairobi-sous-leau-ce-que-les-inondations-de-vendredi-revelent-vraiment\/","title":{"rendered":"Nairobi sous l\u2019eau : ce que les inondations de vendredi r\u00e9v\u00e8lent vraiment\u2026"},"content":{"rendered":"<p class=\"wp-block-paragraph\" id=\"ember52\">Vendredi 5 mars, Nairobi s\u2019est r\u00e9veill\u00e9e sous les eaux.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember53\">Routes transform\u00e9es en rivi\u00e8res. Voitures emport\u00e9es. Maisons inond\u00e9es.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember54\">Selon la presse locale, <strong>au moins 25 personnes ont perdu la vie<\/strong> et <strong>plus de 3 500 foyers ont \u00e9t\u00e9 affect\u00e9s<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember55\">Ces images ont choqu\u00e9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember56\">Mais pour comprendre ce qui s\u2019est pass\u00e9, il faut regarder une chose simple :<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember57\">\ud83d\udc49 <strong>La g\u00e9ographie de Nairobi.<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"ember58\">Nairobi est une ville construite sur des collines<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember59\">Contrairement \u00e0 ce que beaucoup imaginent, Nairobi n\u2019est pas une ville plate.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember60\">Elle est construite sur un relief o\u00f9 <strong>l\u2019eau circule naturellement du haut vers le bas<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember61\">Par exemple :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>L\u2019eau venant de <strong>Kasarani<\/strong> descend vers <strong>Ruai, Githurai et Roysambu<\/strong><\/li>\n\n\n\n<li>L\u2019eau provenant de <strong>Ngong Hills<\/strong> s\u2019\u00e9coule vers <strong>le CBD, Westlands et Parklands<\/strong><\/li>\n\n\n\n<li>L\u2019eau d\u2019<strong>Eastleigh<\/strong> se dirige vers <strong>Mathare<\/strong><\/li>\n\n\n\n<li>L\u2019eau d\u2019<strong>Upper Hill<\/strong> descend vers <strong>Kibera et Kilimani<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember63\">Autrement dit :<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember64\"><strong>lorsqu\u2019il pleut fortement en amont, toute la ville en aval re\u00e7oit l\u2019eau.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember65\">Ce n\u2019est pas une opinion.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember66\">\ud83d\udc49 <strong>C\u2019est de la g\u00e9ographie.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember67\">L\u2019eau descend toujours.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/media.licdn.com\/dms\/image\/v2\/D4D12AQGem9Q3_3qKPw\/article-inline_image-shrink_1500_2232\/B4DZzOWM75KgAU-\/0\/1772988455579?e=1774483200&amp;v=beta&amp;t=NAuPnAFfIk8CghLE0NSFKcJQfyKPJR19HaAKkHRQYnI\" alt=\"Article content\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"ember69\">Le vrai probl\u00e8me : l\u2019urbanisation sans plan de drainage<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember70\">La pluie n\u2019est pas nouvelle.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember71\">Les collines non plus.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember72\">Le probl\u00e8me vient d\u2019ailleurs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember73\">Pendant les deux derni\u00e8res d\u00e9cennies, Nairobi s\u2019est d\u00e9velopp\u00e9e <strong>\u00e0 une vitesse spectaculaire<\/strong> :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>nouveaux immeubles<\/li>\n\n\n\n<li>nouveaux centres commerciaux<\/li>\n\n\n\n<li>nouveaux lotissements<\/li>\n\n\n\n<li>nouvelles routes<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember75\">Mais une question fondamentale a souvent \u00e9t\u00e9 ignor\u00e9e :<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember76\">\ud83d\udc49 <strong>o\u00f9 l\u2019eau doit-elle aller ?<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"ember77\">Une r\u00e8gle que tous les urbanistes connaissent<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember78\">Dans toute ville bien planifi\u00e9e, une r\u00e8gle est simple :<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember79\">Avant de construire des maisons ou des routes, <strong>il faut d\u2019abord planifier l\u2019\u00e9vacuation de l\u2019eau.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember80\">Chaque quartier doit :<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember81\">1\ufe0f\u20e3 avoir son syst\u00e8me de drainage<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember82\">2\ufe0f\u20e3 connecter ce drainage \u00e0 un canal principal<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember83\">3\ufe0f\u20e3 ces canaux doivent se connecter aux rivi\u00e8res<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember84\">4\ufe0f\u20e3 et ces rivi\u00e8res doivent \u00eatre prot\u00e9g\u00e9es<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember85\">C\u2019est la base de l\u2019urbanisme.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"ember86\">Mais \u00e0 Nairobi, l\u2019inverse s\u2019est produit<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember87\">Au fil des ann\u00e9es :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>des <strong>rivi\u00e8res ont \u00e9t\u00e9 occup\u00e9es ou construites autour<\/strong><\/li>\n\n\n\n<li>les <strong>canaux de drainage n\u2019ont pas \u00e9t\u00e9 agrandis<\/strong> alors que la ville grandissait<\/li>\n\n\n\n<li>la <strong>couverture foresti\u00e8re a diminu\u00e9<\/strong>, acc\u00e9l\u00e9rant le ruissellement de l\u2019eau<\/li>\n\n\n\n<li>les <strong>d\u00e9chets bloquent les drains existants<\/strong><\/li>\n\n\n\n<li>certaines structures informelles ont \u00e9t\u00e9 construites <strong>directement sur les voies d\u2019eau<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember89\">R\u00e9sultat :<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember90\">Quand la pluie tombe fortement, <strong>l\u2019eau n\u2019a plus d\u2019endroit o\u00f9 aller.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember91\">Et la ville se transforme en bassin.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"ember92\">Ce n\u2019est pas seulement un probl\u00e8me de m\u00e9t\u00e9o<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember93\">La pluie est naturelle.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember94\">Les collines sont naturelles.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember95\">Mais <strong>une ville qui grandit sans plan de drainage finira toujours par se noyer.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember96\">La vraie question n\u2019est donc pas seulement :<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember97\">\ud83d\udc49 pourquoi a-t-il plu autant ?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember98\">La vraie question est :<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember99\">\ud83d\udc49 <strong>comment la ville a-t-elle \u00e9t\u00e9 planifi\u00e9e pendant toutes ces ann\u00e9es ?<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"ember100\">Nairobi reste une ville extraordinaire\u2026 mais elle doit se pr\u00e9parer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember101\">Nairobi est aujourd\u2019hui :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>un hub technologique africain<\/li>\n\n\n\n<li>un centre financier r\u00e9gional<\/li>\n\n\n\n<li>une capitale de plus de <strong>5 millions d\u2019habitants<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember103\">Sa croissance est impressionnante.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember104\">Mais cette croissance doit d\u00e9sormais s\u2019accompagner de :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>planification urbaine s\u00e9rieuse<\/strong><\/li>\n\n\n\n<li><strong>protection des rivi\u00e8res<\/strong><\/li>\n\n\n\n<li><strong>syst\u00e8mes de drainage adapt\u00e9s \u00e0 la ville moderne<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"ember106\">Sinon, chaque saison des pluies racontera la m\u00eame histoire.<\/p>","protected":false},"excerpt":{"rendered":"<p>Vendredi 5 mars, Nairobi s\u2019est r\u00e9veill\u00e9e sous les eaux. Routes transform\u00e9es en rivi\u00e8res. Voitures emport\u00e9es. Maisons inond\u00e9es. Selon la presse locale, au moins 25 personnes ont perdu la vie et plus de 3 500 foyers ont \u00e9t\u00e9 affect\u00e9s. Ces images ont choqu\u00e9. Mais pour comprendre ce qui s\u2019est pass\u00e9, il faut regarder une chose simple [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":12073,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[54],"tags":[74],"class_list":["post-12072","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vivre-au-kenya","tag-smt"],"acf":[],"_links":{"self":[{"href":"https:\/\/kenya4u.com\/en\/wp-json\/wp\/v2\/posts\/12072","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kenya4u.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kenya4u.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kenya4u.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/kenya4u.com\/en\/wp-json\/wp\/v2\/comments?post=12072"}],"version-history":[{"count":0,"href":"https:\/\/kenya4u.com\/en\/wp-json\/wp\/v2\/posts\/12072\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kenya4u.com\/en\/wp-json\/wp\/v2\/media\/12073"}],"wp:attachment":[{"href":"https:\/\/kenya4u.com\/en\/wp-json\/wp\/v2\/media?parent=12072"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kenya4u.com\/en\/wp-json\/wp\/v2\/categories?post=12072"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kenya4u.com\/en\/wp-json\/wp\/v2\/tags?post=12072"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}