Naslov
Low Flow Analysis of the Drava River

Autori
Sekelj, Valentina ; Tadić, Lidija ; Brleković, Tamara

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Conference proceedings-Full papers / Daňhelka, Jan - Brno : Czech Hydrometeorological Institute, 2021, 48-60

ISBN
978-80-7653-031-7

Skup
29th Conference of the Danubian Countries on Hydrological Forecasting and Hydrological Bases of Water Management

Mjesto i datum
Brno, Češka Republika, 06.09.2021. - 08.09.2021

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
low flow ; standardised streamflow index ; flow duration curve ; streamflow deficit duration

Sažetak
Low-flow periods are considered equally critical from both water management and ecological perspectives. According to catchments’ hydrological and physical features, levels of resilience to both extremes–floods and lowflow periods (or hydrological droughts) can be different. Low-flow episodes are very difficult to recognize owing to the ambiguous definition of ‘low flow’. Several indices have been recommended ; the most frequently used ones include those obtained from low-flow statistics and the standardized streamflow index (SSI). The most common low-flow indices are the mean flow, coefficient of variation in the annual mean flow, flowduration curve, annual minimum flows, streamflow deficit durations, streamflow deficit volumes, recession indices. In this paper, an analysis of proposed low-flow indices is presented, based on daily discharges from 1962 to 2019 measured on two hydrological stations of the Drava River in Croatia . The hydrological stations Terezino Polje and Donji Miholjac are about 70 kilometers apart, so there are no significant differences in the course of the minimum daily flows. During the summer months, the decrease in the value of minimum daily flows is most pronounced, and further analysis of the data leads to the conclusion that the descending trend for both stations in the summer period is statistically significant. The negative trend during the summer months of the hydrological station Donji Miholjac is also shown by the Sen’s slope.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

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