{"id":39771,"date":"2026-01-15T18:23:14","date_gmt":"2026-01-15T17:23:14","guid":{"rendered":"https:\/\/agora.xtec.cat\/escolapaisoscatalans\/?p=39771"},"modified":"2026-03-05T16:15:54","modified_gmt":"2026-03-05T15:15:54","slug":"les-presses-una-construccio-de-gran-utilitat","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/escolapaisoscatalans\/construccions\/les-presses-una-construccio-de-gran-utilitat\/","title":{"rendered":"LES PRESES : una construcci\u00f3 de gran utilitat!"},"content":{"rendered":"

\"\"<\/a><\/p>\n

El Guerau i els seus pares ens van parlar d’una de les construccions m\u00e9s \u00fatils que han fet realitat els humans al llarg de la hist\u00f2ria.<\/p>\n

Les preses d\u2019aigua<\/strong> s\u00f3n construccions fetes per l\u2019\u00e9sser hum\u00e0 que serveixen per retenir l\u2019aigua d\u2019un riu i formar un embassament. Normalment es construeixen amb formig\u00f3, terra o una combinaci\u00f3 de materials resistents, i permeten controlar el cabal del riu.<\/p>\n

Les primeres preses conegudes es van construir fa milers d\u2019anys en civilitzacions antigues com l\u2019antic Egipte i Mesopot\u00e0mia. Una de les m\u00e9s antigues documentades \u00e9s la presa de Jawa Dam<\/span><\/span>, constru\u00efda aproximadament cap al 3000 aC a l\u2019actual Jord\u00e0nia.<\/p>\n

Actualment, la utilitat m\u00e9s important de les preses \u00e9s emmagatzemar aigua<\/strong> per al consum hum\u00e0, el reg agr\u00edcola i la producci\u00f3 d\u2019energia hidroel\u00e8ctrica. A m\u00e9s, tamb\u00e9 ajuden a prevenir inundacions i a regular el cabal dels rius. Tot i aix\u00f2 tamb\u00e9 tenen alguns desavantatges com: quan es construeixen, poden inundar boscos i espais naturals on viuen animals. Aix\u00f2 fa que alguns animals hagin de marxar o desapareguin. Tamb\u00e9 poden obligar persones a deixar casa seva si la zona queda coberta d\u2019aigua. A m\u00e9s, construir una presa costa molts diners i, si algun dia es trenqu\u00e9s, podria causar una gran inundaci\u00f3.<\/p>\n

Tamb\u00e9 ens van explicar que la presa de Les Tres Gorges \u00e9s la m\u00e9s gran del m\u00f3n i es troba situada a la Xina i que la presa de Camarasa ( que tenim molt a prop) durant molts anys va ser la m\u00e9s alta d’Europa.<\/p>\n

Moltes gr\u00e0cies fam\u00edlia per ajudar-nos a entendre la import\u00e0ncia de les preses, els seus avantatges i desavantatges i moltes gr\u00e0cies per haver-nos dedicat el vostre temps. Hem passat una tarda molt profitosa i hem apr\u00e8s moltes coses.<\/p>\n","protected":false},"excerpt":{"rendered":"

El Guerau i els seus pares ens van parlar d’una de les construccions m\u00e9s \u00fatils que han fet realitat els humans al llarg de la hist\u00f2ria. Les preses d\u2019aigua s\u00f3n construccions fetes per l\u2019\u00e9sser hum\u00e0 que serveixen per retenir l\u2019aigua d\u2019un riu i formar un embassament. Normalment es construeixen amb formig\u00f3, terra o una combinaci\u00f3 […]<\/p>\n","protected":false},"author":13,"featured_media":39772,"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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[60],"tags":[],"class_list":["post-39771","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-construccions"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/escolapaisoscatalans\/wp-json\/wp\/v2\/posts\/39771","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/escolapaisoscatalans\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/escolapaisoscatalans\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/escolapaisoscatalans\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/escolapaisoscatalans\/wp-json\/wp\/v2\/comments?post=39771"}],"version-history":[{"count":3,"href":"https:\/\/agora.xtec.cat\/escolapaisoscatalans\/wp-json\/wp\/v2\/posts\/39771\/revisions"}],"predecessor-version":[{"id":39818,"href":"https:\/\/agora.xtec.cat\/escolapaisoscatalans\/wp-json\/wp\/v2\/posts\/39771\/revisions\/39818"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/escolapaisoscatalans\/wp-json\/wp\/v2\/media\/39772"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/escolapaisoscatalans\/wp-json\/wp\/v2\/media?parent=39771"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/escolapaisoscatalans\/wp-json\/wp\/v2\/categories?post=39771"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/escolapaisoscatalans\/wp-json\/wp\/v2\/tags?post=39771"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}