Za posledn\u00ed t\u0159i desetilet\u00ed pro\u0161la velk\u00e1 \u010d\u00e1st \u0159ek ve Spojen\u00fdch st\u00e1tech v\u00fdraznou prom\u011bnou barvy, kter\u00e1 se zm\u011bnila z odst\u00edn\u016f modr\u00e9 na \u017elutou a zelenou. Tato zm\u011bna vyvolala obavy v\u011bdc\u016f a ekolog\u016f, proto\u017ee m\u016f\u017ee nazna\u010dovat zhor\u0161en\u00ed zdrav\u00ed vodn\u00edch tok\u016f v na\u0161\u00ed zemi.<\/p>\n\n
V\u011bdci z University of North Carolina v Chapel Hill analyzovali t\u00e9m\u011b\u0159 235 000 satelitn\u00edch sn\u00edmk\u016f po\u0159\u00edzen\u00fdch NASA a Geologickou slu\u017ebou USA v letech 1984 a\u017e 2018. Jejich zji\u0161t\u011bn\u00ed, publikovan\u00e1 v \u010dasopise Geophysical Research Letters, odhalila, \u017ee t\u0159etina zkouman\u00fdch \u0159ek zm\u011bnila barvu v pr\u016fb\u011bhu desetilet\u00ed.<\/p>\n\n
Anal\u00fdza uk\u00e1zala, \u017ee 56 procent velk\u00fdch \u0159ek vypadalo \u017elut\u011b, zat\u00edmco 38 procent vypadalo zelen\u011b. P\u0159esto\u017ee \u0159eky mohou p\u0159irozen\u011b m\u011bnit barvu v pr\u016fb\u011bhu roku kv\u016fli faktor\u016fm, jako je taj\u00edc\u00ed sn\u00edh nebo d\u00e9\u0161\u0165, v\u011bdci zjistili, \u017ee asi jedna t\u0159etina \u0159ek zaznamenala dlouhodob\u00e9 barevn\u00e9 zm\u011bny.<\/p>\n\n
Barva \u0159eky m\u016f\u017ee poskytnout cenn\u00e9 informace o jej\u00edm zdrav\u00ed. Modr\u00e1 barva obvykle znamen\u00e1 \u010distou, zdravou vodu, zat\u00edmco sedimenty mohou zp\u016fsobit, \u017ee se \u0159eky zbarv\u00ed do \u017eluta, a \u0159asov\u00e9 kv\u011bty mohou v\u00e9st k zelen\u00fdm odst\u00edn\u016fm.<\/p>\n\n
V\u011bdci zjistili, \u017ee nejv\u00fdrazn\u011bj\u0161\u00ed zm\u011bny barev se vyskytovaly kolem p\u0159ehrad, zem\u011bd\u011blsk\u00fdch oblast\u00ed a m\u011bstsk\u00fdch center. P\u0159ehrady mohou zachycovat sedimenty, co\u017e vede ke zv\u00fd\u0161en\u00e9 z\u00e1kalu a ze\u017eloutnut\u00ed vody. Zem\u011bd\u011blsk\u00fd odpad m\u016f\u017ee tak\u00e9 p\u0159isp\u00edvat ke zne\u010di\u0161t\u011bn\u00ed sedimenty, zat\u00edmco m\u011bstsk\u00e9 oblasti mohou vypou\u0161t\u011bt zne\u010di\u0161\u0165uj\u00edc\u00ed l\u00e1tky, kter\u00e9 stimuluj\u00ed r\u016fst \u0159as.<\/p>\n\n
Zdrav\u00ed na\u0161ich \u0159ek m\u00e1 p\u0159\u00edm\u00fd vliv na lidsk\u00e9 zdrav\u00ed. \u0158eky poskytuj\u00ed pitnou vodu, podporuj\u00ed vodn\u00ed ekosyst\u00e9my a nab\u00edzej\u00ed rekrea\u010dn\u00ed p\u0159\u00edle\u017eitosti. Zm\u011bny barvy \u0159eky mohou nazna\u010dovat zhor\u0161en\u00ed kvality vody, co\u017e m\u016f\u017ee p\u0159edstavovat rizika pro lidsk\u00e9 zdrav\u00ed.<\/p>\n\n
Sedimenty mohou ucpat vodn\u00ed filtry a zt\u00ed\u017eit \u00fapravu vody. \u0158asov\u00e9 kv\u011bty mohou produkovat toxiny, kter\u00e9 mohou zp\u016fsobit onemocn\u011bn\u00ed u lid\u00ed a zv\u00ed\u0159at. Krom\u011b toho m\u016f\u017ee b\u00fdt zne\u010di\u0161t\u011bn\u00e1 voda esteticky nep\u0159\u00edjemn\u00e1 a odrazuje lidi od koup\u00e1n\u00ed, ryba\u0159en\u00ed nebo plavby lod\u00ed.<\/p>\n\n
Tradi\u010dn\u011b se v\u011bdci spol\u00e9hali na vzorky vody, aby posoudili zdrav\u00ed \u0159ek. Odb\u011br vzork\u016f vody v\u0161ak m\u016f\u017ee b\u00fdt \u010dasov\u011b n\u00e1ro\u010dn\u00fd a n\u00e1kladn\u00fd. Satelitn\u00ed sn\u00edmky nab\u00edzej\u00ed n\u00e1kladov\u011b efektivn\u00ed a \u00fa\u010dinn\u00fd zp\u016fsob, jak monitorovat zdrav\u00ed \u0159ek na rozs\u00e1hl\u00fdch \u00fazem\u00edch.<\/p>\n\n
Anal\u00fdzou satelitn\u00edch sn\u00edmk\u016f mohou v\u011bdci identifikovat oblasti, kde se \u0159eky rychle m\u011bn\u00ed barvu. Tyto informace jim mohou pomoci stanovit priority oblast\u00ed pro dal\u0161\u00ed studium a c\u00edlen\u00e9 ochran\u00e1\u0159sk\u00e9 \u00fasil\u00ed.<\/p>\n\n
Ochrana a obnova zdrav\u00ed na\u0161ich \u0159ek vy\u017eaduje mnohostrann\u00fd p\u0159\u00edstup. P\u0159ehrady by m\u011bly b\u00fdt navr\u017eeny a provozov\u00e1ny tak, aby minimalizovaly zachycov\u00e1n\u00ed sediment\u016f. Zem\u011bd\u011blsk\u00e9 praktiky by m\u011bly b\u00fdt zavedeny tak, aby se sn\u00ed\u017eil odtok a eroze. M\u011bstsk\u00e9 oblasti by m\u011bly investovat do syst\u00e9m\u016f hospoda\u0159en\u00ed s de\u0161\u0165ovou vodou, aby se zabr\u00e1nilo vnik\u00e1n\u00ed zne\u010di\u0161\u0165uj\u00edc\u00edch l\u00e1tek do vodn\u00edch cest.<\/p>\n\n
Krom\u011b toho je z\u00e1sadn\u00ed ve\u0159ejn\u00e9 vzd\u011bl\u00e1v\u00e1n\u00ed a osv\u011bta, aby se zv\u00fd\u0161ilo pov\u011bdom\u00ed o v\u00fdznamu zdrav\u00ed \u0159ek a aby byli jednotlivci povzbuzov\u00e1ni k p\u0159ij\u00edm\u00e1n\u00ed opat\u0159en\u00ed na ochranu na\u0161ich vodn\u00edch tok\u016f.<\/p>\n\n
Spoluprac\u00ed mohou v\u011bdci, politici a ve\u0159ejnost zajistit, aby na\u0161e \u0159eky z\u016fstaly zdrav\u00e9 a \u017eiv\u00e9 pro budouc\u00ed generace.<\/p>","protected":false},"excerpt":{"rendered":"
Zdrav\u00ed \u0159ek ve Spojen\u00fdch st\u00e1tech: M\u011bn\u00edc\u00ed se krajina Za posledn\u00ed t\u0159i desetilet\u00ed pro\u0161la velk\u00e1 \u010d\u00e1st \u0159ek ve Spojen\u00fdch st\u00e1tech v\u00fdraznou prom\u011bnou barvy, kter\u00e1 se zm\u011bnila z odst\u00edn\u016f modr\u00e9 na \u017elutou…<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38],"tags":[9566,890,889,821,20137,34],"class_list":["post-15071","post","type-post","status-publish","format-standard","hentry","category-environmental-science","tag-water-quality","tag-environmental-monitoring","tag-satellite-imagery","tag-data-visualization","tag-river-health","tag-climate-change"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/15071","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/comments?post=15071"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/15071\/revisions"}],"predecessor-version":[{"id":15072,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/15071\/revisions\/15072"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=15071"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=15071"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=15071"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}