{"id":1772,"date":"2022-12-21T09:37:25","date_gmt":"2022-12-21T09:37:25","guid":{"rendered":"http:\/\/ptgeof.pl\/?page_id=1772"},"modified":"2022-12-25T14:33:09","modified_gmt":"2022-12-25T14:33:09","slug":"specyfika-ksztaltowania-sie-warunkow-termiczno-tlenowych-w-zbiorniku-solina","status":"publish","type":"page","link":"https:\/\/ptgeof.pl\/?page_id=1772","title":{"rendered":"Specyfika kszta\u0142towania si\u0119 warunk\u00f3w termiczno-tlenowych w zbiorniku Solina"},"content":{"rendered":"

<\/a><\/a>Specyfika kszta\u0142towania si\u0119 warunk\u00f3w termiczno-TLENOWYCH W zbiorniku Solina<\/span>
\nThe specificity of the formation of thermal and oxygen conditions in the Solina reservoir<\/span><\/span><\/p>\n

Alicja Dro\u017adzik<\/span><\/span><\/span><\/a>
\n<\/em>Przegl\u0105d Geofizyczny (2021) vol. 66, iss. 3-4, pp. 251-272<\/em><\/span>
\nhttps:\/\/doi.org\/10.32045\/PG-2021-027<\/span><\/p>\n

Streszczenie
\n<\/strong>Artyku\u0142 dotyczy problematyki kszta\u0142towania si\u0119 warunk\u00f3w termiczno-tlenowych w zbiorniku Solina. Zbiorniki zaporowe stanowi\u0105 specyficzny typ akwen\u00f3w, ale mimo \u017ce wykazuj\u0105 cechy po\u015brednie w\u00f3d lotycznych i lenitycznnych, to przez ustawodawc\u0119 zosta\u0142y jednoznacznie zdefiniowane jako wody p\u0142yn\u0105ce. Wieloakwenowa budowa zbiornika Solina sugeruje pewn\u0105 autonomiczno\u015b\u0107 funkcjonowania poszczeg\u00f3lnych cz\u0119\u015bci oraz brak mo\u017cliwo\u015bci \u0142atwego wydzielenia strefy rzecznej, przej\u015bciowej i jeziornej. Skomplikowana morfologia wp\u0142ywa na rzeczywisty czas retencji, kt\u00f3ry determinuje charakter proces\u00f3w fizyczno-chemiczno-biologicznych. Roczna dynamika mas wodnych w zbiorniku obejmuje cyrkulacj\u0119 w\u00f3d w czasie homotermii (wiosn\u0105 i jesieni\u0105) i ich stagnacj\u0119 w czasie stratyfikacji (latem i zim\u0105). Analiza warunk\u00f3w termiczno-tlenowych podczas cyrkulacji (w kwietniu) i stagnacji (w sierpniu) pozwoli\u0142a stwierdzi\u0107 dobre warunki tlenowe w zbiorniku we wszystkich badanych terminach w ka\u017cdej ze stref. Nigdy nie dosz\u0142o do wyczerpania tlenu i powstania warunk\u00f3w beztlenowych. W warstwie powierzchniowej pojawia\u0142y si\u0119 niejednokrotnie przesycenia wody tlenem. Zdiagnozowano ka\u017cdy typ krzywej tlenowej (orto-, klino-, heterograd\u0119 dodatni\u0105 i ujemn\u0105). Warstwy termiczne by\u0142y wyra\u017anie wykszta\u0142cone, zw\u0142aszcza w strefie przej\u015bciowej i jeziornej. Zaznacza\u0142 si\u0119 g\u0142\u0119boki hypolimnion, rosn\u0105ca ku zaporze \u015brednia grubo\u015b\u0107 metalimnionu przy jednoczesnym malej\u0105cym \u015brednim gradiencie jego temperatury, epilimnion za\u015b pozostawa\u0142 warstw\u0105 o zbli\u017conej grubo\u015bci w ka\u017cdej ze stref.<\/span><\/p>\n

S\u0142owa kluczowe:<\/strong> warunki termiczno-tlenowe, zbiornik Solina, pion hydrometryczny, krzywa tlenowa, warstwa termiczna.<\/span><\/p>\n

Abstract
\n<\/strong>The article deals with the issues of thermal and oxygen conditions in the Solina reservoir. Dam reservoirs are a specific type of water reservoirs because they combine the features of flowing and stagnant waters. Despite this, Polish law classifies them as inland flowing waters. The Solina reservoir is characterized by a multi-body water structure and there is no possibility of easy and unambiguous separation of the reservoir zones (riverine zone, transitional zone and lacustrine zone). Nevertheless, selected measurement-control points included in the analysis seems to reflect spatial differences and a slight autonomy in the functioning of individual parts. The complicated structure of the reservoir affects the actual retention time, which determines the nature of the physicochemical and biological processes. The rate of water flow through the reservoir determines the absorption of solar radiation and, together with the ambient temperature, affects the temperature of the water. This, in turn, affects the solubility of oxygen in water. The annual dynamics of water masses in reservoirs of the temperate climate zone is characterized by a dimictic nature \u2013 it includes the circulation of waters during homothermia (spring and autumn) and their stagnation during stratification (summer and winter). The analysis of thermal-oxygen conditions in the Solina reservoir covered the period of circulation (April) and stagnation (August). Each type of oxygen curve was found (orthograde, clinograde, positive heterograde and negative heterograde), and the decrease in oxygen concentration was never associated with the formation of anaerobic conditions. The analysis of water saturation with oxygen allows to notice supersaturation especially in the transitional and lacustrine zone during stagnation. April measurements reflecting the state of homothermia indicate good mixing of waters and homogeneity of temperature and oxygen concentration conditions in the whole hydrometric plumb. Due to the turbulent nature of the flow, which is especially visible in the riverine zone, while in transitional and lacustrine zones, slight thermal differentiation is noticeable even then. August measurements show thermal stratification. The decrease in temperature with depth is usually accompanied by a decrease in oxygen concentration resulting from its consumption in the decomposition process. The lower average concentration of oxygen in the riverine zone results from its consumption on the decomposition of organic matter deposited by the river from the catchment area. The temperature variability in the hydrometric plumbs of successive zones of the reservoir (riverine, transitional, lacustrine) increased both during homothermia and stratification, with a simultaneous decreasing variability of oxygen concentration. The variability of both these parameters during stagnation (August) in the lacustrine zone proves a well-developed hypolimnion. All thermal layers clearly developed during the stagnation, which was best visible in the transitional zone and in the lacustrine zone. The range of the hypolimnion towards the dam increased, what is related to the increasing depth of the reservoir. The average thickness of the metalimnion also increased, while the average temperature gradient of this layer was decreasing. The surface layer of warm water \u2013 epilimnion \u2013 had a similar range in each of the zones.<\/span><\/p>\n

Keywords<\/strong>: thermal-oxygen conditions, Solina reservoir, hydrometric plumb, oxygen curve, thermal layer.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"