{"id":901,"date":"2018-09-20T15:38:42","date_gmt":"2018-09-20T13:38:42","guid":{"rendered":"https:\/\/www.enviblog.cz\/blog\/?p=901"},"modified":"2018-10-06T10:35:34","modified_gmt":"2018-10-06T08:35:34","slug":"jak-se-meri-prutoky","status":"publish","type":"post","link":"https:\/\/www.enviblog.cz\/blog\/2018\/09\/20\/jak-se-meri-prutoky\/","title":{"rendered":"Jak se m\u011b\u0159\u00ed pr\u016ftoky"},"content":{"rendered":"

Jedn\u00edm z dopl\u0148uj\u00edc\u00edch \u00fakol\u016f hydrolog\u016f je p\u0159edstavovat a p\u0159ibli\u017eovat na\u0161i pr\u00e1ci ve\u0159ejnosti. Pravideln\u011b k n\u00e1m chod\u00ed na exkurze \u017e\u00e1ci a studenti ze \u0161kol, zaj\u00edmaj\u00ed se ale i skupinky senior\u016f. Na ja\u0159e m\u011b oslovili kamar\u00e1di ze studentsk\u00e9ho spolku EGEA p\u0159i Masarykov\u011b univerzit\u011b (G\u00da P\u0159F), jestli bychom jim na p\u0159ipravovan\u00e9 v\u011bdeck\u00e9 konferenci mohli ud\u011blat uk\u00e1zku m\u011b\u0159en\u00ed pr\u016ftok\u016f pro skupinku student\u016f geografie z r\u016fzn\u00fdch kout\u016f Evropy. V angli\u010dtin\u011b pochopiteln\u011b. Takov\u00e1 v\u00fdzva tu je\u0161t\u011b nebyla. Tak jsem k\u00fdvla.<\/p>\n

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Practic with experts – t\u0159i hydrologov\u00e9, t\u0159i p\u0159\u00edstroje a osm mlad\u00fdch geograf\u016f<\/figcaption><\/figure>\n

Practic with experts, jak se odpoledn\u00ed program konference jmenoval, padl na sobotu 8. z\u00e1\u0159\u00ed. Poda\u0159ilo se mi p\u0159emluvit k sobotn\u00ed pr\u00e1ci dva povrch\u00e1\u0159e – Standu a Jirku. Vybrali jsme \u010dty\u0159i p\u0159\u00edstroje, kter\u00fdmi u n\u00e1s nej\u010dast\u011bji m\u011b\u0159\u00edme pr\u016ftoky – hydrometrickou vrtuli, FlowTracker, lo\u010f ADCP a lo\u010f ADCP s d\u00e1lkov\u00fdm ovl\u00e1d\u00e1n\u00edm. Lo\u010fku na d\u00e1lkov\u00e9 ovl\u00e1d\u00e1n\u00ed jsme vzali sp\u00ed\u0161e na uk\u00e1zku, proto\u017ee ji p\u0159i stavu 32 cm nebylo mo\u017en\u00e9 pou\u017e\u00edt.<\/p>\n

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Skupinku osmi nad\u0161en\u00fdch mlad\u00fdch budouc\u00edch odborn\u00edk\u016f jsme nejprve vzali do vodom\u011brn\u00e9 stanice Po\u0159\u00ed\u010d\u00ed, Svratka. Pot\u00e9 jsme vybrali dv\u011b genderov\u011b rozd\u011blen\u00e9 polovi\u010dky – d\u011bv\u010data a chlapce. Prvn\u00ed skupina si pod veden\u00edm Jirky vyslechla v\u0161e o m\u011b\u0159en\u00ed pr\u016ftok\u016f s lo\u010fkou ADCP v \u010de\u0161tin\u011b. Jeho projev se maxim\u00e1ln\u011b p\u0159esn\u011b sna\u017eil p\u0159ekl\u00e1dat Pe\u0165a Boucn\u00edk, organiz\u00e1tor cel\u00e9ho odpoledne z EGEA Brno.<\/p>\n

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Jirka p\u0159edstavil lo\u010f ADCP. Studenti si mohli vyzkou\u0161et vodit lo\u010f p\u0159i m\u011b\u0159en\u00ed z mostu. P\u0159i t\u0159ech p\u0159ejezdech tam a zp\u011bt zajistili standardn\u00ed kontroln\u00ed m\u011b\u0159en\u00ed<\/figcaption><\/figure>\n

Druh\u00e1 skupina \u0161la neohro\u017een\u011b rovnou do vody p\u0159\u00edmo u stanice. Standa jim vysv\u011btlil, jak funguje hydrometrick\u00e1 vrtule, jak FlowTracker, a jak\u00fd je mezi nimi rozd\u00edl a pak si to mohli vyzkou\u0161et.<\/p>\n

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Standa kluk\u016fm vysv\u011btluje, jak se ode\u010d\u00edt\u00e1 stav na souty\u010d\u00ed hydrometrick\u00e9 vrtule<\/figcaption><\/figure>\n
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Hol\u010di\u010d\u00ed \u010d\u00e1st zkou\u0161\u00ed, jak dlouho trv\u00e1 prom\u011b\u0159it jednu svislici vrtul\u00ed a FlowTrackerem<\/figcaption><\/figure>\n

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Kr\u00e1tce k pou\u017eit\u00fdm zp\u016fsob\u016fm m\u011b\u0159en\u00ed pr\u016ftok\u016f:<\/strong>
\nLo\u010f ADCP<\/strong> – na plov\u00e1ku je um\u00edst\u011bn p\u0159\u00edstroj funguj\u00edc\u00ed na principu dopplerova posunu zvukov\u00e9ho sign\u00e1lu. P\u0159\u00edstroj vys\u00edl\u00e1 sign\u00e1l, kter\u00fd se odr\u00e1\u017e\u00ed od \u010d\u00e1stic rozpt\u00fdlen\u00fdch ve vod\u011b a vrac\u00ed se zp\u011bt. T\u00edmto zjist\u00edme informace o rychlosti proud\u011bn\u00ed v cel\u00e9m vodn\u00edm sloupci.\u00a0Soub\u011b\u017en\u011b je mapov\u00e1n profil dna stejn\u011b jako pohyb \u010dlunu nap\u0159\u00ed\u010d tokem.<\/p>\n

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ADCP od americk\u00e9 firmy SonTek. Vhodn\u00fd pro m\u011b\u0159en\u00ed na st\u0159edn\u00edch a v\u011bt\u0161\u00edch toc\u00edch s hloubkou alespo\u0148 30 cm a rychlostmi, kter\u00e9 nejsou v\u011bt\u0161\u00ed ne\u017e hloubka pod \u010dlunem.<\/figcaption><\/figure>\n

Hydrometrick\u00e1 vrtule<\/strong> – m\u011b\u0159\u00ed bodov\u00e9 rychlosti proud\u011bn\u00ed v jednotliv\u00fdch \u010d\u00e1stech p\u0159\u00ed\u010dn\u00e9ho profilu. Vrtule se ot\u00e1\u010d\u00ed kolem osy a p\u0159ipojen\u00e9\u00a0 po\u010ditadlo registruje po\u010det ot\u00e1\u010dek za stanoven\u00fd \u010das. Zapisovatel na b\u0159ehu zaznamen\u00e1v\u00e1 po\u010det zm\u011b\u0159en\u00fdch ot\u00e1\u010dek v jednotliv\u00fdch svislic\u00edch v p\u0159edem stanoven\u00fdch hloubk\u00e1ch (nap\u0159. p\u0159i hloubce do 50 cm se m\u011b\u0159\u00ed ve 20 a 80 % hloubky). Prom\u011b\u0159\u00ed se cel\u00fd profil toku. Zapsan\u00e9 hodnoty se pot\u00e9 vyhodnot\u00ed v p\u0159\u00edslu\u0161n\u00e9m programu.<\/p>\n

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Hydrometrick\u00e1 vrtule od n\u011bmeck\u00e9 firmy OTT Hydromet se pou\u017e\u00edv\u00e1 p\u0159i m\u011b\u0159en\u00ed pr\u016ftok\u016f p\u0159i vodn\u00edm stavu ji\u017e od 4 cm<\/figcaption><\/figure>\n

FlowTracker<\/strong> – funguje na stejn\u00e9m principu jako ADCP, vyu\u017e\u00edv\u00e1 tedy dopplerova jevu. M\u011b\u0159\u00ed se bodov\u00e9 rychlosti stejn\u011b jako u hydrometrick\u00e9 vrtule. V\u00fdsledn\u00fd pr\u016ftok vyhodnot\u00ed p\u0159\u00edstroj hned po dom\u011b\u0159en\u00ed posledn\u00ed svislice.<\/p>\n

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Detail displeje FlowTrackeru.<\/figcaption><\/figure>\n
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Podvodn\u00ed detail m\u011b\u0159\u00edc\u00edho za\u0159\u00edzena FlowTrackeru. Na odkraj\u00edch „vidlice“ jsou vys\u00edla\u010de sign\u00e1lu a uprost\u0159ed je p\u0159ij\u00edma\u010d odra\u017een\u00e9ho sign\u00e1lu, kter\u00fd se vrac\u00ed zp\u011bt k p\u0159\u00edstroji<\/figcaption><\/figure>\n

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Jedn\u00edm z dopl\u0148uj\u00edc\u00edch \u00fakol\u016f hydrolog\u016f je p\u0159edstavovat a p\u0159ibli\u017eovat na\u0161i pr\u00e1ci ve\u0159ejnosti. Pravideln\u011b k n\u00e1m chod\u00ed na exkurze \u017e\u00e1ci a studenti ze \u0161kol, zaj\u00edmaj\u00ed se ale i skupinky senior\u016f. Na ja\u0159e m\u011b oslovili kamar\u00e1di ze studentsk\u00e9ho spolku EGEA p\u0159i Masarykov\u011b univerzit\u011b (G\u00da P\u0159F), jestli bychom jim na p\u0159ipravovan\u00e9 v\u011bdeck\u00e9 konferenci mohli ud\u011blat uk\u00e1zku m\u011b\u0159en\u00ed pr\u016ftok\u016f […]<\/p>\n","protected":false},"author":5,"featured_media":912,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false},"version":2}},"categories":[4],"tags":[50,58],"coauthors":[32],"class_list":["post-901","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-voda","tag-mereni","tag-prutoky","entry","has-media"],"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/www.enviblog.cz\/blog\/wp-content\/uploads\/2018\/09\/41666402_10204811563605401_697992388156588032_o.jpg","jetpack_shortlink":"https:\/\/wp.me\/pa1A1I-ex","_links":{"self":[{"href":"https:\/\/www.enviblog.cz\/blog\/wp-json\/wp\/v2\/posts\/901","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.enviblog.cz\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.enviblog.cz\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.enviblog.cz\/blog\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.enviblog.cz\/blog\/wp-json\/wp\/v2\/comments?post=901"}],"version-history":[{"count":7,"href":"https:\/\/www.enviblog.cz\/blog\/wp-json\/wp\/v2\/posts\/901\/revisions"}],"predecessor-version":[{"id":932,"href":"https:\/\/www.enviblog.cz\/blog\/wp-json\/wp\/v2\/posts\/901\/revisions\/932"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.enviblog.cz\/blog\/wp-json\/wp\/v2\/media\/912"}],"wp:attachment":[{"href":"https:\/\/www.enviblog.cz\/blog\/wp-json\/wp\/v2\/media?parent=901"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.enviblog.cz\/blog\/wp-json\/wp\/v2\/categories?post=901"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.enviblog.cz\/blog\/wp-json\/wp\/v2\/tags?post=901"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/www.enviblog.cz\/blog\/wp-json\/wp\/v2\/coauthors?post=901"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}