{"id":6794,"date":"2025-10-23T17:49:10","date_gmt":"2025-10-23T15:49:10","guid":{"rendered":"https:\/\/agora.xtec.cat\/iesgallecs\/?p=6794"},"modified":"2025-10-23T17:49:10","modified_gmt":"2025-10-23T15:49:10","slug":"el-servei-comunitari-de-4t-eso-realitza-estudi-al-riu-besos","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/iesgallecs\/general\/el-servei-comunitari-de-4t-eso-realitza-estudi-al-riu-besos\/","title":{"rendered":"El servei comunitari de 4t ESO realitza estudi al riu Bes\u00f2s"},"content":{"rendered":"
En data de 22 d’octubre, un equip del Servei Comunitari de 4t d’ESO ha realitzat la prospecci\u00f3 de tardor del riu Bes\u00f2s al seu pas per Mollet, i s’han detectat diverses q\u00fcestions interessants.<\/i><\/div>\n
–\u00a0A nivell d’accessos<\/b>, cal dir que les pluges han fet cr\u00e9ixer for\u00e7a matolls i ha costat accedir al riu, caldria un m\u00ednim manteniment per la banda de la llera de Sant Fost.\u00a0<\/i><\/div>\n
–\u00a0La morfologia del riu ha anat patint canvis<\/b>\u00a0deguts a l’erosi\u00f3 i els materials que arrossega, a m\u00e9s de la vegetaci\u00f3 que ha crescut en illes centrals. S’ha observat que quan el cabal supera els 800L\/s, hi\u00a0ha aigua del Bes\u00f2s que s’introdueix a la desembocadura de la Riera de Gallecs. Tamb\u00e9 s’ha observat, en aquestes condicions hidrom\u00e8triques, que el curs del riu es bifurca en una illa central que serveix de refugi d’\u00e0necs. En aquesta ocasi\u00f3, el cabal estimat era d’uns 890 L\/s.<\/i><\/div>\n
–\u00a0Par\u00e0metres fisico-qu\u00edmics<\/b>. Igual que en les vegades anteriors, l’aigua presenta una gran transpar\u00e8ncia, no t\u00e9 color, i fa una olor molt lleugera a claveguera, quasi indetectable quan el cabal \u00e9s gener\u00f3s. El pH \u00e9s adequat, poc per sobre del 7. La temperatura de l’aigua era de 22\u00baC, for\u00e7a c\u00e0lida.<\/i><\/div>\n
A nivell d’oxigen, se situa en la franja propera als 4 mg\/L, amb una saturaci\u00f3 aproximada d’un 42%. Uns valors acceptables per a una m\u00ednima qualitat biol\u00f2gica, per\u00f2 no \u00f2ptims. D’altra banda, la concentraci\u00f3 de nitrats \u00e9s massa elevada, amb un valor proper als 60 mg\/L. Aix\u00f2 \u00e9s degut a que la majoria del cabal \u00e9s depurat, i tamb\u00e9 hi podria afectar l’aportaci\u00f3 de la riera de Gallecs.\u00a0<\/i><\/div>\n
–\u00a0Macrofauna.<\/b>\u00a0En aquesta prospecci\u00f3 hem pogut observar molts ocells: corbs marins, bernat pescaire, \u00e0necs collverd, cuereta, mosquiters, i fins i tot un blauet. Tamb\u00e9 hem observat llebres, peixos a l’aiguabarreig amb la riera, i hem sentit ficar-se a l’aigua una tortuga.\u00a0<\/i><\/div>\n
–\u00a0Macroinvertebrats aqu\u00e0tics<\/b>. S’han detectat oligoquets, plan\u00e0ries, \u00e0cars de riu, espiadimonis i efem\u00e8rids.\u00a0<\/i><\/div>\n
Un cop m\u00e9s, certifiquem que el Bes\u00f2s mant\u00e9 una qualitat biol\u00f2gica tra\u00e7able, per\u00f2 en uns l\u00edmits fr\u00e0gils que cal preservar\u00a0 i millorar.\u00a0<\/i><\/div>\n
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En data de 22 d’octubre, un equip del Servei Comunitari de 4t d’ESO ha realitzat la prospecci\u00f3 de tardor del riu Bes\u00f2s al seu pas per Mollet, i s’han detectat diverses q\u00fcestions interessants. –\u00a0A nivell d’accessos, cal dir que les pluges han fet cr\u00e9ixer for\u00e7a matolls i ha costat accedir al riu, caldria un m\u00ednim […]<\/p>\n","protected":false},"author":36,"featured_media":6795,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","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":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-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":"","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-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":"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":""},"mobile":{"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":""}},"footnotes":""},"categories":[1,29],"tags":[250,142,215],"class_list":["post-6794","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general","category-portada","tag-curs-25-26","tag-eso","tag-gallecs-sostenible"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/iesgallecs\/wp-json\/wp\/v2\/posts\/6794","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/iesgallecs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/iesgallecs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesgallecs\/wp-json\/wp\/v2\/users\/36"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesgallecs\/wp-json\/wp\/v2\/comments?post=6794"}],"version-history":[{"count":2,"href":"https:\/\/agora.xtec.cat\/iesgallecs\/wp-json\/wp\/v2\/posts\/6794\/revisions"}],"predecessor-version":[{"id":6800,"href":"https:\/\/agora.xtec.cat\/iesgallecs\/wp-json\/wp\/v2\/posts\/6794\/revisions\/6800"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesgallecs\/wp-json\/wp\/v2\/media\/6795"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/iesgallecs\/wp-json\/wp\/v2\/media?parent=6794"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesgallecs\/wp-json\/wp\/v2\/categories?post=6794"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesgallecs\/wp-json\/wp\/v2\/tags?post=6794"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}