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Vpliv računskih kriterijev na vrednosti recesijskih konstant nizkih pretokov v nehomogenem porečju v Sloveniji [Elektronski vir] = Influence of calculation criteria on the values of low-flow recession constants in a non-homogenous catchment in SloveniaLebar, Klaudija ; Rusjan, Simon ; Šraj, Mojca, hidrologijaV prispevku smo analizirali vpliv izbire treh kriterijev na vrednost recesijskih konstant nizkih pretokov, in sicer vpliv izbire metode izračuna, vpliv izbire dolžine segmenta recesijske krivulje (4, ... 5, 6 ali 7 dni) in vpliv izbire obdobja (celotno obdobje, mesečno, sezonsko), na podlagi katerega se določi začetni pretok, ki določa mejo za vključitev padajočih delov hidrograma v recesijsko analizo. Analiza je izdelana na dnevnih podatkih pretokov 11 vodomernih postaj hidrogeološko nehomogenega porečja Ljubljanice. Za vsako od obravnavanih postaj smo z različno kombinacijo kriterijev izračunali 24 vrednosti recesijskih konstant, na podlagi katerih smo s statističnimi testi in grafičnimi pristopi določili vpliv posameznega kriterija na končni rezultat. Analiza je pokazala, da se rezultati, dobljeni po različnih metodah, statistično značilno razlikujejo na vseh obravnavanih postajah. Vrednosti recesijskih konstant po metodi posameznih recesijskih segmentov (IRS) so v povprečju za 3,1 dan višje od vrednosti po metodi glavne recesijske krivulje (MRC). Vpliv ostalih dveh kriterijev, tj. dolžine segmenta in izbire obdobja, ni tako enoznačen, saj je najverjetneje pogojen z lastnostmi porečja, ki vplivajo na časovno dinamiko odtoka.Source: Acta hydrotechnica [Elektronski vir]. - ISSN 1581-0267 (Letn. 32, št. 56, 2019, str. 1-19)Type of material - e-articlePublish date - 2019Language - slovenianCOBISS.SI-ID - 8851041
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Lebar, Klaudija | 38531 |
Rusjan, Simon | 24342 |
Šraj, Mojca, hidrologija | 16258 |
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