Sediment transport on the Romanian section of the Danube River

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Constantin BONDAR Gabriel IORDACHE

Abstract

The paper briefly presents the physico-geographical characteristics of the Danube River basin in order to introduce data and considerations on the river water and sediment discharges, focusing on the coarse-grained bed- and suspended loads.
The analysis of interactions between the water flow and the riverbed physical structure allowed to establish the empirical functions of the bed- and suspended coarse-grained sediment load transport. For a given cross-section a linear dependence between the average specific water discharge and the coarse sediment bed-load average specific discharge as well as the mean concentration of the suspended coarse sediment was found.


The coarse-grained sediment transport empirical functions based on a long series data for the period 1965 – 1989 allowed the determination of the daily coarse-grained bed- and suspended sediment discharges along the Romanian Danube River section for an extended period between 1840 and 2012.


The multiannual average values and maximum annual discharges of the bed- and suspended coarse-grained sediment load (d50%>0.063 mm) have been
computed for the cross-sections downstream the Iron Gates barrages.


For the coarse-grained bed load:


  • The multiannual average values of the bed-load discharge vary from 14.6 kg/s at Gruia (km 856.5) to 5.6 kg/s at Ceatal Ismail (Km 80.5);

  • The maximum values of the bed-load discharge vary between 23.9 kg/s at Zimnicea (km 553.23) and 47.9 kg/s at Grindu (km 141.3).

  • For the coarse-grained suspended load:

  • The multiannual average values of the coarse-grained suspended load discharge vary between 54.1 kg/s at Zimnicea and 130.1 kg/s at Ceatal Ismail;

  • The maximum values of the coarse-grained suspended load discharge vary from 400 kg/s at Corabia (km 624.2) to 2048 kg/s at Ceatal Ismail.

Article Details

How to Cite
BONDAR, Constantin; IORDACHE, Gabriel. Sediment transport on the Romanian section of the Danube River. Geo-Eco-Marina, [S.l.], v. 22, dec. 2016. ISSN 1224-6808. Available at: <https://journal.geoecomar.ro/geo-eco-marina/article/view/02_2016>. Date accessed: 08 feb. 2023. doi: https://doi.org/10.5281/zenodo.889809.
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