![\"\"](\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\")
<\/a>\nObr.\u00a011. \u00dahrny sr\u00e1\u017eek v\u00a0letech 2015\u20132019 jako procento norm\u00e1lu 1981\u20132010 (zdroj: \u010cHM\u00da)
\nFig. 11. Amount of precipitation in 2015\u20132019 year period expressed as percentage normal 1981\u20132010 (source: \u010cHM\u00da)<\/h6>\n
Povod\u00ed Blatn\u00e9ho rybn\u00edka m\u00e1 oproti ostatn\u00edm zkouman\u00fdm povod\u00edm odli\u0161n\u00fd odtokov\u00fd re\u017eim s\u00a0pod\u00edlem odtoku ze spadl\u00fdch sr\u00e1\u017eek okolo 75 %. V\u00fdraznou m\u011brou se na odtoku pod\u00edl\u00ed jak dotace podpovrchov\u00e9 vody z\u00a0pramenn\u00fdch ra\u0161elini\u0161\u0165, tak vysok\u00e1 nadmo\u0159sk\u00e1 v\u00fd\u0161ka, kdy doch\u00e1z\u00ed k\u00a0postupn\u00e9mu odt\u00e1v\u00e1n\u00ed sn\u011bhov\u00e9 pokr\u00fdvky b\u011bhem zimy a\u00a0na ja\u0159e, a\u00a0to i\u00a0p\u0159esto, \u017ee v\u00a0roce 2015 a\u00a02018 byly zimy sr\u00e1\u017ekov\u011b velmi chud\u00e9 (zejm\u00e9na v\u00a0\u00fanoru). Jak uv\u00e1d\u00ed hydrologick\u00e1 ro\u010denka \u010cHM\u00da [4], na d\u00edl\u010d\u00ed povod\u00ed Horn\u00edho a\u00a0st\u0159edn\u00edho Labe spadlo v\u00a0\u00fanoru 2018 jen 9\u00a0mm sr\u00e1\u017eek, co\u017e \u010din\u00ed 21 % norm\u00e1lu, respektive vodn\u00ed hodnota sn\u011bhu byla v\u00a0\u00fanoru 2018 jen 9,3 mm (32 % norm\u00e1lu).<\/p>\n
Rok 2018 a\u00a0p\u0159edev\u0161\u00edm jeho letn\u00ed m\u011bs\u00edce (nejv\u00edce srpen) jsou v\u00a0r\u00e1mci sledovan\u00e9ho obdob\u00ed 2015\u20132019 jednozna\u010dn\u011b nejsu\u0161\u0161\u00ed v\u00a0p\u0159\u00edpad\u011b odtok\u016f na v\u0161ech zpracovan\u00fdch povod\u00edch. Hydrologick\u00e9 sucho zas\u00e1hlo v\u00fdznamn\u011b cel\u00e9 \u00fazem\u00ed \u010cR, v\u00a0mnoha vodom\u011brn\u00fdch stanic\u00edch byly zaznamen\u00e1ny pr\u016ftoky pod hranici Q<\/em>355d<\/sub>, respektive Q<\/em>364d<\/sub> [8].<\/p>\nV\u00a0povod\u00ed S\u00e1zavy k\u00a0profilu stanice \u017d\u010f\u00e1r nad S\u00e1zavou byl odtok z\u00a0povod\u00ed v\u00a0letech 2015, 2017 a\u00a02019 v\u00fdrazn\u011b vy\u0161\u0161\u00ed ne\u017e spadl\u00e9 sr\u00e1\u017eky (odtokov\u00e9 koeficienty v\u011bt\u0161\u00ed ne\u017e 1) a\u00a0rovn\u011b\u017e v\u00a0letech 2016 a\u00a02018 byly pod\u00edly odtoku v\u016f\u010di sr\u00e1\u017ek\u00e1m v\u00fdrazn\u011b vy\u0161\u0161\u00ed ne\u017e v\u00a0ostatn\u00edch zkouman\u00fdch povod\u00edch (krom\u011b Blatn\u00e9ho potoka). Odtoky z\u00a0povod\u00ed S\u00e1zavy jsou pravd\u011bpodobn\u011b zkreslen\u00e9 stavebn\u00edmi pracemi na vodn\u00edch d\u00edlech v\u00a0povod\u00ed a\u00a0vypou\u0161t\u011bn\u00edm Velk\u00e9ho D\u00e1\u0159ka p\u0159i v\u00fdlovu ryb na podzim. Detaily o\u00a0manipulac\u00edch v\u0161ak autor\u016fm v\u00a0dob\u011b zpracov\u00e1n\u00ed p\u0159\u00edsp\u011bvku nebyly zn\u00e1my. Velmi pravd\u011bpodobn\u011b doch\u00e1z\u00ed tak\u00e9 k\u00a0dotaci povrchov\u00e9ho odtoku z\u00a0ra\u0161elini\u0161\u0165 v\u00a0pramenn\u00e9 \u010d\u00e1sti, stejn\u011b jako u\u00a0povod\u00ed Blatn\u00e9ho rybn\u00edka.<\/p>\n
Ve v\u011bt\u0161in\u011b povod\u00ed byla maxim\u00e1ln\u00ed hodnota evapotranspirace v\u00a0\u010dervnu 2019, vysok\u00e9 hodnoty byly odvozeny i\u00a0v\u00a0roce 2017. Naopak ve velmi such\u00e9m a\u00a0sr\u00e1\u017ekov\u011b chud\u00e9m roce 2018 vych\u00e1zej\u00ed hodnoty evapotranspirace relativn\u011b n\u00edzk\u00e9. V\u00a0\u010dervnu 2019 byla tak\u00e9 na v\u0161ech povod\u00edch nejv\u011bt\u0161\u00ed z\u00e1porn\u00e1 hydrologick\u00e1 bilance ur\u010den\u00e1 podle v\u00fd\u0161e uveden\u00e9 rovnice (od 37 do 102 mm), co\u017e m\u016f\u017ee b\u00fdt zp\u016fsobeno ji\u017e zm\u00edn\u011bnou vysokou evapotranspirac\u00ed. Nejvy\u0161\u0161\u00edch hodnot nab\u00fdv\u00e1 evapotranspirace shodn\u011b v\u00a0m\u011bs\u00edc\u00edch \u010dervnu a\u00a0\u010dervenci. Lze tedy konstatovat, \u017ee z\u00a0pohledu evapotranspirace byl ve zkouman\u00e9 period\u011b 2015\u20132019 kritick\u00fdm rok 2019.<\/p>\n
Hydrologickou bilanci povod\u00ed v\u00fdznamn\u011b ovliv\u0148uj\u00ed manipulace na vodn\u00edch d\u00edlech a\u00a0mal\u00fdch vodn\u00edch n\u00e1dr\u017e\u00edch, vypou\u0161t\u011bn\u00ed p\u0159ed v\u00fdlovy rybn\u00edk\u016f, p\u0159evody vody atp. Pro spr\u00e1vn\u00e9 stanoven\u00ed hydrologick\u00e9 bilance je nezbytn\u00e9 m\u00edt tyto informace k\u00a0dispozici a\u00a0um\u011bt je p\u0159i v\u00fdpo\u010dtu bilance kvantifikovat. U\u00a0mal\u00fdch vodn\u00edch n\u00e1dr\u017e\u00ed je z\u00a0tohoto pohledu p\u0159esn\u00e1 kvantifikace veli\u010din hydrologick\u00e9 bilance \u0159\u00e1dov\u011b obt\u00ed\u017en\u011bj\u0161\u00ed ne\u017e pro velk\u00e1 \u00fazem\u00ed, jak je zpracov\u00e1v\u00e1 \u010cHM\u00da ve sv\u00fdch ka\u017edoro\u010dn\u00edch publikac\u00edch. Jako vhodn\u00e9 dopln\u011bn\u00ed do budoucna se jev\u00ed porovn\u00e1n\u00ed vybran\u00fdch povod\u00ed s\u00a0ohledem na odvozen\u00ed \u00fahrnu sr\u00e1\u017eek za cel\u00e9 zkouman\u00e9 p\u011btilet\u00ed 2015\u20132019 a\u00a0jeho porovn\u00e1n\u00ed s\u00a0norm\u00e1lov\u00fdm obdob\u00edm 1981\u20132010, a\u00a0to v\u00a0\u0161ir\u0161\u00edm prostorov\u00e9m m\u011b\u0159\u00edtku se zam\u011b\u0159en\u00edm na distribuci sr\u00e1\u017eek pro cel\u00e9 \u00fazem\u00ed \u010cR. Pro p\u0159esn\u011bj\u0161\u00ed zhodnocen\u00ed rozd\u00edl\u016f mezi jednotliv\u00fdmi povod\u00edmi by bylo tak\u00e9 vhodn\u00e9 roz\u0161\u00ed\u0159it zkouman\u00e9 lokality o\u00a0povod\u00ed na \u00fazem\u00ed z\u00e1padn\u00edch \u010cech a\u00a0Moravy. V\u00fdsledky prezentovan\u00e9 v\u00a0tomto p\u0159\u00edsp\u011bvku jsou sou\u010d\u00e1st\u00ed a\u00a0budou d\u00e1le vyu\u017eity p\u0159i \u0159e\u0161en\u00ed uveden\u00e9ho projektu TITSMZP809.<\/p>\n
Pod\u011bkov\u00e1n\u00ed<\/h3>\n
Tento p\u0159\u00edsp\u011bvek vznikl v r\u00e1mci projektu Technologick\u00e9 agentury \u010cR programu BETA 2 s n\u00e1zvem TITSMZP809 \u201eVliv mal\u00fdch vodn\u00edch n\u00e1dr\u017e\u00ed na hladinu podzemn\u00edch vod a celkovou hydrologickou bilanci s d\u016frazem na such\u00e1 obdob\u00ed\u201c. Pod\u011bkov\u00e1n\u00ed d\u00e1le pat\u0159\u00ed koleg\u016fm Petru \u0160erclovi a Kl\u00e1\u0159e Sedl\u00e1kov\u00e9 za poskytnut\u00e1 rastrov\u00e1 data sr\u00e1\u017eek a evapotranspirace.
\n<\/em><\/p>\nP\u0159\u00edsp\u011bvek pro\u0161el lektorsk\u00fdm \u0159\u00edzen\u00edm.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"The contribution is aimed to the determination and assessment of a hydrological balance at selected watersheds in Czech Republic during the dry period 2015\u20132019. Hydrological balance was processed in gauging stations of watershed Blatn\u00fd stream, Lomnice, Skalice, \u017dehrovka, Javorka, Cidlina, Boti\u010d and upper S\u00e1zava river using data from Czech hydrometeorological institute. Monthly, long-term monthly and annual values were calculated for precipitation, runoff and evapotranspiration. Results were compared across the selected watersheds and with long-term period 1981\u20132010. Runoffs from watersheds were compared with gauging average discharge of an entire observation period.<\/p>\n","protected":false},"author":8,"featured_media":12396,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2,86],"tags":[121,2809,302,2810,2808],"coauthors":[1824,235,124],"class_list":["post-30902","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-from-the-world-of-water-management","category-hydraulics-hydrology-and-hydrogeology","tag-drought","tag-runoff-coefficient","tag-small-water-reservoirs","tag-time-series","tag-watershed-runoff"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.vtei.cz\/en\/wp-json\/wp\/v2\/posts\/30902","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vtei.cz\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vtei.cz\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vtei.cz\/en\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vtei.cz\/en\/wp-json\/wp\/v2\/comments?post=30902"}],"version-history":[{"count":6,"href":"https:\/\/www.vtei.cz\/en\/wp-json\/wp\/v2\/posts\/30902\/revisions"}],"predecessor-version":[{"id":30908,"href":"https:\/\/www.vtei.cz\/en\/wp-json\/wp\/v2\/posts\/30902\/revisions\/30908"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.vtei.cz\/en\/wp-json\/wp\/v2\/media\/12396"}],"wp:attachment":[{"href":"https:\/\/www.vtei.cz\/en\/wp-json\/wp\/v2\/media?parent=30902"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vtei.cz\/en\/wp-json\/wp\/v2\/categories?post=30902"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vtei.cz\/en\/wp-json\/wp\/v2\/tags?post=30902"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/www.vtei.cz\/en\/wp-json\/wp\/v2\/coauthors?post=30902"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"\"](\"https:\/\/www.vtei.cz\/wp-content\/uploads\/2021\/07\/Tyl-1.jpg\")
<\/a>\n![\"\"](\"https:\/\/www.vtei.cz\/wp-content\/uploads\/2021\/07\/Tyl-vzorec-2.jpg\")
<\/a>\n