{"id":5971,"date":"2017-02-22T20:53:38","date_gmt":"2017-02-22T20:53:38","guid":{"rendered":"https:\/\/escobarsl.com\/\/transportar-aigua-ve-de-lluny\/"},"modified":"2017-02-22T20:53:38","modified_gmt":"2017-02-22T20:53:38","slug":"transportar-aigua-ve-de-lluny","status":"publish","type":"post","link":"https:\/\/escobarsl.com\/ca\/transportar-aigua-ve-de-lluny\/","title":{"rendered":"Transportar aigua ve de lluny"},"content":{"rendered":"<p>No diem m\u00e9s que una obvietat quan parlem que l&#8217;aigua potable \u00e9s essencial per a la vida, ara i durant tota la hist\u00f2ria de la humanitat. \u00c9s per aix\u00f2, que des dels nostres avantpassats m\u00e9s passats s&#8217;han dedicat molts esfor\u00e7os a transportar aigua i acostar-la al nucli de conviv\u00e8ncia humana per emmagatzemar-la i consumir-la.<\/p>\n<p>Amb el comen\u00e7ament de l&#8217;exist\u00e8ncia humana, la vida ha transcorregut a prop dels rius i llacs. Les possibilitats t\u00e8cniques eren prec\u00e0ries i el transport d&#8217;aigua es feia complicat o impossible. \u00c9s per aquest motiu que els primers assentaments es van produir prop de llocs on l&#8217;aigua potable fora de f\u00e0cil acc\u00e9s.<\/p>\n<p>Aquestes comunitats anaven creixent i cada vegada era m\u00e9s complicat viure tots a prop dels rius i llacs i les necessitats anaven canviant, per aquest motiu es van comen\u00e7ar a crear els primers canals per transportar aigua i aix\u00ed els primers pous, fa 7.000 anys a Jeric\u00f3 (Israel). Aquests canals eren molt rudimentaris, simplement excavacions a la sorra o a la roca.<\/p>\n<p>A poc a poc, els mecanismes de transport d&#8217;aigua es van anar sofisticant, van comen\u00e7ar les primeres &#8220;canonades&#8221; amb els egipcis que van utilitzar arbres buits i els Xinesos i Japonesos amb canyes de bamb\u00fa.<\/p>\n<p>Les comunitats eren cada vegada m\u00e9s grans, aix\u00ed com les seves necessitats. Les dist\u00e0ncies augmentaven i la qualitat de l&#8217;aigua precisava de tractaments. Els primers a aplicar t\u00e8cniques per depurar aigua van ser els egipcis al 1.500 a.C. Les t\u00e8cniques de potabilitzaci\u00f3 d&#8217;aigua que utilitzaven era mitjan\u00e7ant ebullici\u00f3 amb foc, el Sol o submergint una pe\u00e7a de ferro cremant dins l&#8217;aigua. Un altre m\u00e8tode per a la filtraci\u00f3 d&#8217;aigua consistia en bullir-la i colar-la entre grava o sorra.<\/p>\n<p>Despr\u00e9s dels egipcis va arribar l&#8217;antiga Gr\u00e8cia que per les seves necessitats en nombre d&#8217;habitants i la m\u00e9s avan\u00e7ada societat van comen\u00e7ar amb sistemes de recollida, purificaci\u00f3 i distribuci\u00f3 a gran escala de l&#8217;aigua, a m\u00e9s millorant els materials utilitzats i servint-se de cer\u00e0mica, fusta o metall per a realitzar aquest transport. Tamb\u00e9 es van preocupar per construir sistemes d&#8217;evacuaci\u00f3 d&#8217;aig\u00fces ja utilitzades i la recollida i purificaci\u00f3 de les aig\u00fces pluvials.<\/p>\n<p>Per\u00f2 van ser els romans a posteriori qui van fer les megaconstruccions per a la distribuci\u00f3 d&#8217;aigua i el seu emmagatzematge, en grans quantitats, en preses artificials. A partir de les preses l&#8217;aigua es distribu\u00efa mitjan\u00e7ant canonades fetes amb materials diversos (ciment, roca, bronze, plom, &#8230;).<\/p>\n<p>Despr\u00e9s vam entrar en un fosc temps de no evoluci\u00f3 en aquest sentit, fins i tot donant passos enrere, per exemple en l&#8217;edat mitjana on la contaminaci\u00f3 d&#8217;aigua era permanent creant greus problemes de salut.<\/p>\n<p>Amb la revoluci\u00f3 industrial tornen els grans aven\u00e7os en aquest camp, conjuntament amb la in\u00e8rcia d&#8217;innovaci\u00f3 que es vivia a l&#8217;\u00e8poca.<\/p>\n<p>Per\u00f2 no va ser fins 1804 on trobem la primera ciutat amb subministrament d&#8217;aigua potable per a tota la ciutat, va ser a Paisley (Esc\u00f2cia).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>No decimos m\u00e1s que una obviedad cuando hablamos que el agua potable es esencial para la vida, ahora y durante toda la historia de la humanidad.<\/p>\n","protected":false},"author":1,"featured_media":5701,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5971","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sin-categorizar"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - 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