Naslov
Channel processes and sedimentation in the Kupa River (Croatia)

Autori
Frančišković-Bilinski, Stanislav ; Bhattacharya, Asok Kumar

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Goldschmidt Conference Abstracts 2009, supplement to Geochimica et Cosmochimica Acta / Podosek, Frank A. - Davos : Elsevier, 2009, A392-A392

Skup
Goldschmidt 2009 - Our volatile planet

Mjesto i datum
Davos, Švicarska, 21.06.2009. - 26.06.2009

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Kupa River; channel processes; sedimentation; sediment transport

Sažetak
Introduction Channel processes and sedimentation of the 300 km long Kupa River have been studied first time, after some previous research describing sediment pollution [1, 2, 3]. This river basin is of supraregional interest: besides its central position in Croatia, it is shared by two neighboring countries (Slovenia and Bosnia and Herzegovina) and is of strategic importance due to its rich water resources. Also, some of its parts in karstic areas are protected as national parks. Results, Discussion and Conclusions The generally meandering course starts from a karstic spring and flows to the plains with braided channels. The river basin material varies in size from bulders to fine sand. The bouldery and gravelly marginal bars and channel bars are quite conspicuous in the upper part and sandy point bars characterize some locations of the meander bends. Grain size data were used to predict sediment transport paths compared with literature [4]. Cumulative curves of fluvial deposits attain more and more lognormality with distance of transport, show two inflections, indicating breaks for rolling to saltation and saltation to suspension mode of transport. There is general fining of grain size downstream, Mz (φ ) increases. Majority of samples show moderate to poor sorting. The negative skewness in the upper stretch reflects addition of pebble sizes to the main sand fraction. Lower portion of river is getting moribund due its localized and arrested geomorphic setting and severe eutrophication with macroalgal blooms and marsh vegetation. Human interference caused modification to morphodynamics of the river channel. Systematic monitoring of its geomorphological and pollution status is suggested. [1] Frančišković-Bilinski (2007) Fres. Env. Bullet. 16, 561-575. [2] Frančišković-Bilinski (2007) J. Geochem. Explor. 88, 106-109. [3] Frančišković-Bilinski et al. (2005) Fres. Env. Bullet. 14, 282-290. [4] Mc Laren and Bowles (1985) J. Sed. Petrol. 55, 457-470.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA