{"id":11736,"date":"2021-07-14T12:47:29","date_gmt":"2021-07-14T10:47:29","guid":{"rendered":"http:\/\/volcanx.cluster031.hosting.ovh.net\/?page_id=11736"},"modified":"2021-07-15T12:18:19","modified_gmt":"2021-07-15T10:18:19","slug":"erosion-et-sediments","status":"publish","type":"page","link":"https:\/\/volcanofoundation.org\/fr\/renforcer-la-connaissance-des-risques\/monitoring\/hydrologie\/erosion-et-sediments\/","title":{"rendered":"\u00c9ROSION ET S\u00c9DIMENTS"},"content":{"rendered":"<div id=\"av_section_1\" class=\"avia-section av-av_section-a3505495476c97acb77226663f388d50 main_color avia-section-default avia-no-border-styling  avia-builder-el-0  el_before_av_section  avia-builder-el-first  avia-full-stretch av-parallax-section avia-bg-style-parallax av-minimum-height av-minimum-height-25 av-height-25  container_wrap fullsize\" data-section-bg-repeat=\"stretch\" data-av_minimum_height_pc=\"25\" data-av_min_height_opt=\"25\"><div class=\"av-parallax\" data-avia-parallax-ratio=\"0.3\"><div class=\"av-parallax-inner main_color avia-full-stretch\"><\/div><\/div><div class=\"container av-section-cont-open\"><main role=\"main\" itemprop=\"mainContentOfPage\" class=\"template-page content  av-content-full alpha units\"><div class=\"post-entry post-entry-type-page post-entry-11736\"><div class=\"entry-content-wrapper clearfix\">\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_one_fifth-25347b0a799d5b9f7058434b2a9c3182\">\n.flex_column.av-av_one_fifth-25347b0a799d5b9f7058434b2a9c3182{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-av_one_fifth-25347b0a799d5b9f7058434b2a9c3182 av_one_fifth  avia-builder-el-1  el_before_av_three_fifth  avia-builder-el-first  first flex_column_div av-zero-column-padding  \"><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_three_fifth-f7c1061df29de8cca6b42fcf455fe4a0\">\n.flex_column.av-av_three_fifth-f7c1061df29de8cca6b42fcf455fe4a0{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-av_three_fifth-f7c1061df29de8cca6b42fcf455fe4a0 av_three_fifth  avia-builder-el-2  el_after_av_one_fifth  el_before_av_one_fifth  flex_column_div av-zero-column-padding  \"><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_textblock-8d09e837ca2380e6bdc85d849f6641d9\">\n#top .av_textblock_section.av-av_textblock-8d09e837ca2380e6bdc85d849f6641d9 .avia_textblock{\ncolor:#ffffff;\n}\n<\/style>\n<section class=\"av_textblock_section av-av_textblock-8d09e837ca2380e6bdc85d849f6641d9 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock av_inherit_color\" itemprop=\"text\"><div class=\"h2-cinta-programas\">\n<h1 style=\"text-align: center; font-size: 2.5em;\">RENFORCER LA CONNAISSANCE DES RISQUES<\/h1>\n<\/div>\n<\/div><\/section><br>\n<section class=\"av_textblock_section av-av_textblock-820f97e5aca1e77a0a12cd8a6430c9f2 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock\" itemprop=\"text\"><p class=\"p-cinta-programas\" style=\"text-align: center; background: #f5312a !important;\">POURQUOI LA FONDATION EST N&Eacute;E ?<span class=\"flecha-donativo\" style=\"vertical-align: inherit;\"> &gt;<\/span><\/p>\n<\/div><\/section><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_one_fifth-f7c1061df29de8cca6b42fcf455fe4a0\">\n.flex_column.av-av_one_fifth-f7c1061df29de8cca6b42fcf455fe4a0{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-av_one_fifth-f7c1061df29de8cca6b42fcf455fe4a0 av_one_fifth  avia-builder-el-5  el_after_av_three_fifth  avia-builder-el-last  flex_column_div av-zero-column-padding  \"><\/div>\n\n<\/div><\/div><\/main><!-- close content main element --><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-k3yaxsym-b831a12c8acddceb21a18cbb360fd41d\">\n.avia-section.av-k3yaxsym-b831a12c8acddceb21a18cbb360fd41d{\nbackground-color:#000000;\nbackground-image:unset;\n}\n.avia-section.av-k3yaxsym-b831a12c8acddceb21a18cbb360fd41d .av-section-color-overlay{\nopacity:0.9;\nbackground-color:#000000;\n}\n<\/style>\n<div id=\"av_section_2\" class=\"avia-section av-k3yaxsym-b831a12c8acddceb21a18cbb360fd41d main_color avia-section-default avia-no-border-styling  avia-builder-el-6  el_after_av_section  el_before_av_textblock  avia-bg-style-fixed av-section-color-overlay-active container_wrap fullsize\"><div class=\"av-section-color-overlay-wrap\"><div class=\"av-section-color-overlay\"><\/div><div class=\"container av-section-cont-open\"><div class=\"template-page content  av-content-full alpha units\"><div class=\"post-entry post-entry-type-page post-entry-11736\"><div class=\"entry-content-wrapper clearfix\">\n<div class=\"flex_column_table av-a5p0bb-0286912bb6bfb93801b9fa33860921b2 sc-av_one_full av-equal-height-column-flextable\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-a5p0bb-0286912bb6bfb93801b9fa33860921b2\">\n.flex_column.av-a5p0bb-0286912bb6bfb93801b9fa33860921b2{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-a5p0bb-0286912bb6bfb93801b9fa33860921b2 av_one_full  avia-builder-el-7  avia-builder-el-no-sibling  first flex_column_table_cell av-equal-height-column av-align-middle av-zero-column-padding  \"><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-joihkone-69e81b3ac324ed7c1268b0d71e700013\">\n#top .av_textblock_section.av-joihkone-69e81b3ac324ed7c1268b0d71e700013 .avia_textblock{\nfont-size:18px;\ncolor:#ffffff;\n}\n\n@media only screen and (min-width: 768px) and (max-width: 989px){ \n#top .av_textblock_section.av-joihkone-69e81b3ac324ed7c1268b0d71e700013 .avia_textblock{\nfont-size:16px;\n}\n}\n\n@media only screen and (min-width: 480px) and (max-width: 767px){ \n#top .av_textblock_section.av-joihkone-69e81b3ac324ed7c1268b0d71e700013 .avia_textblock{\nfont-size:16px;\n}\n}\n\n@media only screen and (max-width: 479px){ \n#top .av_textblock_section.av-joihkone-69e81b3ac324ed7c1268b0d71e700013 .avia_textblock{\nfont-size:16px;\n}\n}\n<\/style>\n<section class=\"av_textblock_section av-joihkone-69e81b3ac324ed7c1268b0d71e700013 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock av_inherit_color\" itemprop=\"text\"><blockquote>\n<p><a href=\"http:\/\/www.undrr.org\"><strong>LES DISASTERS NE SONT PAS NATURELS<\/strong><\/a>, ils sont construits socialement, par manque de pr&eacute;paration, de pr&eacute;vention, de travail d&rsquo;att&eacute;nuation, d&rsquo;&eacute;ducation et de suivi. <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;CE&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Abr&eacute;viation de &amp;quot;l&amp;#039;&egrave;re commune&amp;quot; ou &amp;quot;l&amp;#039;&egrave;re actuelle&amp;quot;. CE se r&eacute;f&egrave;re &agrave; l&amp;#039;ann&eacute;e &eacute;coul&eacute;e depuis le d&eacute;but de l&amp;#039;&egrave;re actuelle dans le calendrier julien ou gr&eacute;gorien, par exemple l&amp;#039;ann&eacute;e civile. L&amp;#039;&egrave;re pr&eacute;c&eacute;dente est appel&eacute;e &amp;quot;Avant l&amp;#039;&egrave;re actuelle&amp;quot; ou BCE.&lt;\/div&gt;\"  href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/ce-fr\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'  tabindex='0' role='link'>Ce<\/a> sont des risques ou des dangers naturels qui ont un impact sur les soci&eacute;t&eacute;s vuln&eacute;rables. Les connaissances aident &agrave; <strong>r&eacute;duire la vuln&eacute;rabilit&eacute; sociale<\/strong> et <strong>structurale<\/strong> afin d&rsquo;avoir des soci&eacute;t&eacute;s plus <strong>r&eacute;silientes<\/strong>!<\/p>\n<\/blockquote>\n<\/div><\/section><\/div><\/div><!--close column table wrapper. Autoclose: 1 -->\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div><\/div><div id=\"after_section_2\" class=\"main_color av_default_container_wrap container_wrap fullsize\"><div class=\"container av-section-cont-open\"><div class=\"template-page content  av-content-full alpha units\"><div class=\"post-entry post-entry-type-page post-entry-11736\"><div class=\"entry-content-wrapper clearfix\">\n<section class=\"av_textblock_section av-kqt9jd5e-cd33964ef4e3b772df7fef522b816d29 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock\" itemprop=\"text\"><h2>Les &eacute;tudes de dispersion et d&rsquo;hydrologie permettent de mieux comprendre le transport des s&eacute;diments et les modifications du paysage<\/h2>\n<p>.<\/p>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kqt9ln1w-f6affe7cdeee6be02fc225bbc4bc5689\">\n#top .hr.av-kqt9ln1w-f6affe7cdeee6be02fc225bbc4bc5689{\nmargin-top:15px;\nmargin-bottom:15px;\n}\n.hr.av-kqt9ln1w-f6affe7cdeee6be02fc225bbc4bc5689 .hr-inner{\nwidth:100%;\nborder-color:#d8d8d8;\n}\n<\/style>\n<div class=\"hr av-kqt9ln1w-f6affe7cdeee6be02fc225bbc4bc5689 hr-custom  avia-builder-el-10  el_after_av_textblock  el_before_av_three_fifth  hr-center hr-icon-no\"><span class=\"hr-inner inner-border-av-border-thin\"><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-1wlhzr6-8cc129343b9618e21784b665a1361b31\">\n.flex_column.av-1wlhzr6-8cc129343b9618e21784b665a1361b31{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-1wlhzr6-8cc129343b9618e21784b665a1361b31 av_three_fifth  avia-builder-el-11  el_after_av_hr  el_before_av_two_fifth  first flex_column_div av-zero-column-padding  \"><section class=\"av_textblock_section av-kqt9tgn4-955ae44a3b12f5f76d41e08b4c147261 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock\" itemprop=\"text\"><h3>Les zones volcaniques sont tr&egrave;s sensibles &agrave; l&rsquo;&eacute;rosion<\/h3>\n<p>Les zones volcaniques sont tr&egrave;s sensibles &agrave; l&rsquo;&eacute;rosion et &agrave; la dispersion de mat&eacute;riaux qui modifient rapidement le paysage. Cela n&eacute;cessite une surveillance intensive pour documenter le type et la taille des s&eacute;diments, identifier les zones o&ugrave; les s&eacute;diments sont &eacute;rod&eacute;s et d&eacute;pos&eacute;s, et d&eacute;terminer le taux et le volume du transport des s&eacute;diments. Ces donn&eacute;es sur les s&eacute;diments sont int&eacute;gr&eacute;es dans des mod&egrave;les informatiques pour concevoir des projets qui r&eacute;duisent l&rsquo;impact de l&rsquo;accumulation des s&eacute;diments.<\/p>\n<p><strong>Les &eacute;tudes de surveillance sont men&eacute;es de diff&eacute;rentes mani&egrave;res :<\/strong><\/p>\n<p>Les scientifiques effectuent des mesures r&eacute;p&eacute;t&eacute;es sur le terrain pendant de nombreuses ann&eacute;es. Ces mesures sont effectu&eacute;es avec des instruments qui mesurent la distance et l&rsquo;angle par rapport &agrave; un r&eacute;flecteur, ou avec des <a title=\"GPS\" href=\"http:\/\/volcanx.cluster031.hosting.ovh.net\/es\/creando-conocimiento-de-los-riesgos\/monitoring\/deformation\/gps\/\">GPS<\/a> &eacute;quipements utilisant le positionnement par satellite. Les scientifiques comparent les profils en coupe transversale obtenus au fil du temps pour &eacute;valuer l&rsquo;&eacute;rosion et le d&eacute;p&ocirc;t dans le canal.<br>\nLes mod&egrave;les num&eacute;riques d&rsquo;&eacute;l&eacute;vation (MNE), qui produisent des cartes tr&egrave;s pr&eacute;cises de la surface terrestre, peuvent &ecirc;tre cr&eacute;&eacute;s &agrave; l&rsquo;aide de photographies num&eacute;riques ou de la technologie lidar. Ces mod&egrave;les cr&eacute;&eacute;s &agrave; diff&eacute;rents moments peuvent &ecirc;tre compar&eacute;s pour d&eacute;finir avec pr&eacute;cision les zones d&rsquo;&eacute;rosion et de d&eacute;p&ocirc;t. Les donn&eacute;es recueillies &agrave; distance permettent une analyse d&eacute;taill&eacute;e des changements &agrave; l&rsquo;&eacute;chelle du bassin et une compr&eacute;hension plus approfondie de l&rsquo;eau et de l&rsquo;&eacute;volution g&eacute;ologique.<\/p>\n<\/div><\/section><br>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kqta1i5b-107d1a9c40127944f7fe3b907c4f1f41\">\n#top .hr.hr-invisible.av-kqta1i5b-107d1a9c40127944f7fe3b907c4f1f41{\nheight:30px;\n}\n<\/style>\n<div class=\"hr av-kqta1i5b-107d1a9c40127944f7fe3b907c4f1f41 hr-invisible  avia-builder-el-13  el_after_av_textblock  avia-builder-el-last \"><span class=\"hr-inner \"><span class=\"hr-inner-style\"><\/span><\/span><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-1iz7j36-2c9786a9f3f90bd1396461500bfb925f\">\n.flex_column.av-1iz7j36-2c9786a9f3f90bd1396461500bfb925f{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-1iz7j36-2c9786a9f3f90bd1396461500bfb925f av_two_fifth  avia-builder-el-14  el_after_av_three_fifth  el_before_av_three_fifth  flex_column_div av-zero-column-padding  \"><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kqtcpnnn-0ba1922f421194a8c0538b73d08d5390\">\n.avia-image-container.av-kqtcpnnn-0ba1922f421194a8c0538b73d08d5390 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-kqtcpnnn-0ba1922f421194a8c0538b73d08d5390 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<\/p><div class=\"avia-image-container av-kqtcpnnn-0ba1922f421194a8c0538b73d08d5390 av-styling- avia-align-center  avia-builder-el-15  el_before_av_textblock  avia-builder-el-first \" itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class=\"wp-image-11795 avia-img-lazy-loading-not-11795 avia_image \" src=\"https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/sediment.-white-river.jpg\" alt=\"\" title=\"sediment.-white-river\" height=\"1520\" width=\"1140\" itemprop=\"thumbnailUrl\" srcset=\"https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/sediment.-white-river.jpg 1140w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/sediment.-white-river-225x300.jpg 225w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/sediment.-white-river-773x1030.jpg 773w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/sediment.-white-river-768x1024.jpg 768w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/sediment.-white-river-1125x1500.jpg 1125w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/sediment.-white-river-529x705.jpg 529w\" sizes=\"(max-width: 1140px) 100vw, 1140px\"\/><\/div><\/div><\/div><br>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kqtcpuh7-d8db4528b4900c045b62972c54904769\">\n#top .av_textblock_section.av-kqtcpuh7-d8db4528b4900c045b62972c54904769 .avia_textblock{\nfont-size:14px;\n}\n<\/style>\n<section class=\"av_textblock_section av-kqtcpuh7-d8db4528b4900c045b62972c54904769 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock\" itemprop=\"text\"><p><em>La rivi&egrave;re White charg&eacute;e de s&eacute;diments &agrave; 11 km en aval du pont OR35. De fortes pluies ont entra&icirc;n&eacute; des charges &eacute;lev&eacute;es de s&eacute;diments au sein de cette rivi&egrave;re, qui draine le mont Hood, en Oregon.<\/em><\/p>\n<\/div><\/section><br>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-14hay76-b9bade6c53b94b7d00ae79f4a86820fd\">\n#top .hr.hr-invisible.av-14hay76-b9bade6c53b94b7d00ae79f4a86820fd{\nheight:30px;\n}\n<\/style>\n<div class=\"hr av-14hay76-b9bade6c53b94b7d00ae79f4a86820fd hr-invisible  avia-builder-el-17  el_after_av_textblock  avia-builder-el-last \"><span class=\"hr-inner \"><span class=\"hr-inner-style\"><\/span><\/span><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-18lbb6q-87550747df59579e54d808ac2931e107\">\n.flex_column.av-18lbb6q-87550747df59579e54d808ac2931e107{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-18lbb6q-87550747df59579e54d808ac2931e107 av_three_fifth  avia-builder-el-18  el_after_av_two_fifth  el_before_av_two_fifth  first flex_column_div av-zero-column-padding  \"><section class=\"av_textblock_section av-kqtndm82-562c4361a16fe4cf0e0a8660981b3296 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock\" itemprop=\"text\"><h3>Le suivi de la quantit&eacute; de s&eacute;diments et du d&eacute;bit des rivi&egrave;res permet d&rsquo;att&eacute;nuer les risques d&rsquo;inondation<\/h3>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-j4dmom-e2fc0bca4c69b3088ce572b05d481a83\">\n#top .hr.hr-invisible.av-j4dmom-e2fc0bca4c69b3088ce572b05d481a83{\nheight:20px;\n}\n<\/style>\n<div class=\"hr av-j4dmom-e2fc0bca4c69b3088ce572b05d481a83 hr-invisible  avia-builder-el-20  avia-builder-el-no-sibling \"><span class=\"hr-inner \"><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<p>Les instruments install&eacute;s dans les stations mesurent le niveau d&rsquo;eau, ou stade, des rivi&egrave;res toutes les 15 minutes, et des &eacute;chantillonneurs autopompes pr&eacute;l&egrave;vent fr&eacute;quemment des &eacute;chantillons d&rsquo;eau pour les analyser en laboratoire. En combinant un enregistrement continu du niveau d&rsquo;une rivi&egrave;re avec des mesures fr&eacute;quentes du d&eacute;bit d&rsquo;eau et de la concentration des s&eacute;diments en suspension, les scientifiques calculent le d&eacute;bit total d&rsquo;eau et de s&eacute;diments en suspension pour produire des totaux quotidiens, mensuels et annuels. Les technologies utilisant la transmission de la lumi&egrave;re (pour mesurer la turbidit&eacute;), le son (hydroacoustique) et l&rsquo;imagerie (&agrave; partir de satellites ou de cam&eacute;ras num&eacute;riques) permettent une plus grande pr&eacute;cision et efficacit&eacute; dans la documentation des charges s&eacute;dimentaires.<\/p>\n<\/div><\/section><br>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-2ku2vya-9e0955ca4cd05529245b4d0521926470\">\n#top .hr.hr-invisible.av-2ku2vya-9e0955ca4cd05529245b4d0521926470{\nheight:30px;\n}\n<\/style>\n<div class=\"hr av-2ku2vya-9e0955ca4cd05529245b4d0521926470 hr-invisible  avia-builder-el-21  el_after_av_textblock  avia-builder-el-last \"><span class=\"hr-inner \"><span class=\"hr-inner-style\"><\/span><\/span><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-jj5682-678197d27f776c3f98b140a2da919f02\">\n.flex_column.av-jj5682-678197d27f776c3f98b140a2da919f02{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-jj5682-678197d27f776c3f98b140a2da919f02 av_two_fifth  avia-builder-el-22  el_after_av_three_fifth  avia-builder-el-last  flex_column_div av-zero-column-padding  \"><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kqtct05s-b6bd28bb6955a6744dc1cdd6930a8641\">\n.avia-image-container.av-kqtct05s-b6bd28bb6955a6744dc1cdd6930a8641 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-kqtct05s-b6bd28bb6955a6744dc1cdd6930a8641 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<\/p><div class=\"avia-image-container av-kqtct05s-b6bd28bb6955a6744dc1cdd6930a8641 av-styling- avia-align-center  avia-builder-el-23  el_before_av_textblock  avia-builder-el-first \" itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class=\"wp-image-11799 avia-img-lazy-loading-not-11799 avia_image \" src=\"https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/suspended-sediment-sample.jpg\" alt=\"\" title=\"suspended-sediment-sample\" height=\"855\" width=\"1140\" itemprop=\"thumbnailUrl\" srcset=\"https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/suspended-sediment-sample.jpg 1140w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/suspended-sediment-sample-300x225.jpg 300w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/suspended-sediment-sample-1030x773.jpg 1030w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/suspended-sediment-sample-768x576.jpg 768w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/suspended-sediment-sample-705x529.jpg 705w\" sizes=\"(max-width: 1140px) 100vw, 1140px\"\/><\/div><\/div><\/div><br>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kqtcts5h-57c1b66f9f33e5409181efa0a1e49220\">\n#top .av_textblock_section.av-kqtcts5h-57c1b66f9f33e5409181efa0a1e49220 .avia_textblock{\nfont-size:14px;\n}\n<\/style>\n<section class=\"av_textblock_section av-kqtcts5h-57c1b66f9f33e5409181efa0a1e49220 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock\" itemprop=\"text\"><p><em>Collecte d&rsquo;&eacute;chantillons de s&eacute;diments en suspension dans la rivi&egrave;re Toutle de la fourche nord en amont de la structure de r&eacute;tention des s&eacute;diments, en aval du mont St. Helens.<\/em><\/p>\n<\/div><\/section><br>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mpxjnm-05fe96d43e6bb4872a43f0a4da0324e7\">\n#top .hr.hr-invisible.av-mpxjnm-05fe96d43e6bb4872a43f0a4da0324e7{\nheight:30px;\n}\n<\/style>\n<div class=\"hr av-mpxjnm-05fe96d43e6bb4872a43f0a4da0324e7 hr-invisible  avia-builder-el-25  el_after_av_textblock  el_before_av_image \"><span class=\"hr-inner \"><span class=\"hr-inner-style\"><\/span><\/span><\/div><br>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kqtd3ng6-d4d7f6de0bf4219138f8097ff209a531\">\n.avia-image-container.av-kqtd3ng6-d4d7f6de0bf4219138f8097ff209a531 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-kqtd3ng6-d4d7f6de0bf4219138f8097ff209a531 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div class=\"avia-image-container av-kqtd3ng6-d4d7f6de0bf4219138f8097ff209a531 av-styling- avia-align-center  avia-builder-el-26  el_after_av_hr  el_before_av_textblock \" itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class=\"wp-image-11802 avia-img-lazy-loading-not-11802 avia_image \" src=\"https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/annual-surveys-water-channels-mount-st-helens.jpg\" alt=\"\" title=\"annual-surveys-water-channels-mount-st-helens\" height=\"855\" width=\"1140\" itemprop=\"thumbnailUrl\" srcset=\"https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/annual-surveys-water-channels-mount-st-helens.jpg 1140w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/annual-surveys-water-channels-mount-st-helens-300x225.jpg 300w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/annual-surveys-water-channels-mount-st-helens-1030x773.jpg 1030w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/annual-surveys-water-channels-mount-st-helens-768x576.jpg 768w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/annual-surveys-water-channels-mount-st-helens-705x529.jpg 705w\" sizes=\"(max-width: 1140px) 100vw, 1140px\"\/><\/div><\/div><\/div><br>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kqtd4eq5-8230bd2338f4e8701330dd1be29564ec\">\n#top .av_textblock_section.av-kqtd4eq5-8230bd2338f4e8701330dd1be29564ec .avia_textblock{\nfont-size:14px;\n}\n<\/style>\n<section class=\"av_textblock_section av-kqtd4eq5-8230bd2338f4e8701330dd1be29564ec \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock\" itemprop=\"text\"><p><em>Les relev&eacute;s annuels des canaux d&rsquo;eau dans le crat&egrave;re du mont Saint Helens permettent de suivre les taux d&rsquo;&eacute;rosion, d&rsquo;aggradation.<\/em><\/p>\n<\/div><\/section><br>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-ptmgqq-9afde2fd95e777e2efc6ca42e532eeea\">\n#top .hr.hr-invisible.av-ptmgqq-9afde2fd95e777e2efc6ca42e532eeea{\nheight:30px;\n}\n<\/style>\n<div class=\"hr av-ptmgqq-9afde2fd95e777e2efc6ca42e532eeea hr-invisible  avia-builder-el-28  el_after_av_textblock  avia-builder-el-last \"><span class=\"hr-inner \"><span class=\"hr-inner-style\"><\/span><\/span><\/div><\/div>\n<\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Volcanic land is eroding rapidly, deforming the landscape and producing material that is washed away by rain and rivers.<br>\nIt is imperative to take into account the modelling and dispersion of materials to avoid socio-economic losses:<\/p>\n","protected":false},"author":8,"featured_media":11142,"parent":11720,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-11736","page","type-page","status-publish","has-post-thumbnail","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/pages\/11736","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/comments?post=11736"}],"version-history":[{"count":0,"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/pages\/11736\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/pages\/11720"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/media\/11142"}],"wp:attachment":[{"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/media?parent=11736"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}