{"id":19547,"date":"2024-03-19T09:49:31","date_gmt":"2024-03-19T08:49:31","guid":{"rendered":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/?p=19547"},"modified":"2024-03-19T09:49:31","modified_gmt":"2024-03-19T08:49:31","slug":"la-forca-de-laigua","status":"publish","type":"post","link":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/general\/la-forca-de-laigua\/","title":{"rendered":"La for\u00e7a de l’aigua"},"content":{"rendered":"

\"\"L\u2019alumnat de Geologia i Ci\u00e8ncies Ambientals de batxillerat de l\u2019Institut Montpedr\u00f3s<\/a> de Santa Coloma de Cervell\u00f3 i de l\u2019Institut Joanot Martorell<\/a> d\u2019Esplugues de Llobregat ha vingut dimecres 13 de mar\u00e7 a Les Escletxes del Papiol per estudiar els processos de vessant i els riscos naturals<\/a> associats a aquest fenomen.<\/p>\n

Nom\u00e9s arribar s\u2019han situat geogr\u00e0ficament amb un GPS professional i han diferenciat els materials superiors dels inferiors que es veien a simple vista. Despr\u00e9s, dividits en 2 equips de treball i amb el material de camp proporcionat, han analitzat la consist\u00e8ncia, la resist\u00e8ncia, la impermeabilitat, la ductilitat i la pres\u00e8ncia de carbonats en ambd\u00f3s materials. Amb l\u2019ajuda d\u2019una taula dicot\u00f2mica han identificat els materials superiors com a calc\u00e0ries fossil\u00edferes (amb bivalves i coralls) i els inferiors com a lutites (argiles).<\/p>\n

\"\"Despr\u00e9s d\u2019una pausa per esmorzar s\u2019han endinsat a l\u2019interior de 6 de les escletxes principals per tal de pendre\u2019n diferents mesures: direcci\u00f3, inclinaci\u00f3, profunditat i els despla\u00e7aments horitzontal i vertical. Amb totes les dades recollides, analitzant els fen\u00f2mens impulsors i de resist\u00e8ncia, han pogut elaborar un model te\u00f2ric de com s\u2019havien pogut formar, arribant a la seg\u00fcent conclusi\u00f3: com que les roques calc\u00e0ries es degraden a causa de l\u2019aigua de la pluja, lleugerament \u00e0cida, aquest efecte faria que les esquerdes s\u2019anessin eixamplant i aprofundint fins permetre a l\u2019aigua arribar a les argiles inferiors. Quan plou, les argiles es tornen fangoses i es comporten de manera pl\u00e0stica. Aix\u00f2, juntament amb el pendent, hauria provocat que les calc\u00e0ries llisquessin vessant avall fins a formar despr\u00e9s de milions d\u2019anys el fenomen geol\u00f2gic que veiem avui dia.<\/p>\n

\"\"Tamb\u00e9 han conegut el fenomen de reptaci\u00f3 o creep que afecta alguns arbres de la zona i que presenten una morfologia del tronc visiblement corbada.<\/p>\n

Finalment, tenint en compte l\u2019impacte que t\u00e9 aquest fenomen a les infraestructures del poble del Papiol, podran calcular el risc que suposa aquest proc\u00e9s de vessant en la fa\u00e7ana d\u2019un dels edificis tenint en compte el cost dels b\u00e9ns exposats, la vulnerabilitat i la probabilitat dels danys o per\u00edode de retorn.<\/p>\n

L\u2019enhorabona per la feina feta! Esperem que h\u00e0giu disfrutat travessant d\u2019una esquerda a una altra com ge\u00f2legs i ge\u00f2logues professionals!<\/p>\n","protected":false},"excerpt":{"rendered":"

L\u2019alumnat de Geologia i Ci\u00e8ncies Ambientals de batxillerat de l\u2019Institut Montpedr\u00f3s de Santa Coloma de Cervell\u00f3 i de l\u2019Institut Joanot Martorell d\u2019Esplugues de Llobregat ha vingut dimecres 13 de mar\u00e7 a Les Escletxes del Papiol per estudiar els processos de vessant i els riscos naturals associats a aquest fenomen. Nom\u00e9s arribar s\u2019han situat geogr\u00e0ficament amb […]<\/p>\n","protected":false},"author":3,"featured_media":19552,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","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":"","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":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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