Morphological Changes of the Fluvial Islets from the Danube River (Turcescu Islet-Cernavodă Sector) between 1908 and 2016

Autor: IORDACHE, Gabriel, BONDAR, Constantin, ANGHEL, Sorin, MALAGEANU, Marian
Jazyk: angličtina
Rok vydání: 2017
Předmět:
DOI: 10.5281/zenodo.1688236
Popis: The studied area in this paper, belongs to the lower sector of the Danube River and is comprised between Turcescu islet (km 345) and Cernavodă (km 297). This area is characterized by numerous branches, secondary branches and islets, indicating a state of hydro- morphological instability of the riverbed. The hydro-morphological changes that occurred over the time in the analysed sector, have significantly affected the morpho-hydrography of the secondary branches. The consequences of riverbed changes in the Bala branch-Danube bifurcation area were reflected by increasing the takeover capacity of water by Bala branch to the detriment of the Old Danube. As a result of this process, a deepening of the Bala branch occurs at low waters, endangering the optimal depths for navigation, the occurrence of critical points for navigation downstream, morphological changes of the islets and the main elements of the riverbed. Along the analysed range, the number of islets present in the Old Danube riverbed increased during the period 1908-2008; in the last part of the interval (2008-2016) the number remained unchanged. Also, it is observed an increase in the total length of the islets and also changes in their geometry and position.
{"references":["Bondar C. (2004). Caracterizarea complexă a sectorului Dunării care prezintă interes pentru sistemul de funcţionare multiunitate de răcire cu apă CNE Cernavodă şi sistemul de primire a sarcinii termice pentru operarea ecologică de siguranţă, GeoEcoMar Archive, Bucureşti, 9 p.","Bondar, C. (2015). Soluție hidraulică de redistribuire a debitelor de apă ale Dunării la ostrovul Turcescu, Conferință Științifică Anuală a INHGA, București.","Constantinescu, Şt., Achim, D., Rus, I., Giosan, L. (2015). Embanking the Lower Danube: From Natural to Engineered Floodplains and Back, Geomorphic Approaches to Integrated Floodplain Management of Lowland Fluvial Systems in North America and Europe, p. 265-288.","Marin, A.F., Armaş, I., Nenciu Posner, C. (2015). Schimbări plan-spaţiale în evoluţia ostroavelor. Aplicaţie în sectorul dunărean Giurgiu (km 493) – Olteniţa (km 430), Institutul Naţional de Hidrologie şi Gospodărire a Apelor, Conferinţa Ştiinţifică Anuală, Bucureşti.","McCarney-Castle, K., Voulgaris, G., Kettner, A.J., Giosan, L. (2011). Simulating fluvial fluxes in the Danube watershed: The 'Little Ice Age' versus modern day, The Holocene, no. 22 (I), p. 91-105.","Perșoiu, I., Rădoane, M. (2011). Spatial and temporal controls on historical channel responses – study of an atypical case: Someșu Mic River, Romania, Earth Surface Processes and Landforms, 36, p. 1279-1418.","Posea, Gr. (2005). Geomorfologia României: reliefuri, tipuri, geneză, evoluţie, regionare, Ediţia a II-a, Bucureşti, Editura Fundaţiei România de Mâine, 328 p.","Stănescu, V. Al., Stănculescu S (Eds.) (1967). Dunărea între Baziaș și Ceatal Izmail. Monografie hidrologică, Editura Tehnică, București, 369 p.","Stagl, J.C., Hattermann, F.F., (2016). Impacts of Climate Change on Riverine Ecosystems: Alterations of Ecologically Relevant Flow Dynamics in the Danube River and Its Major Tributaries, Water, 8(12), 566 p., doi:10.3390/w8120566.","Surian, N. (1999). Channel changes due to river regulation: The case of the Piave River, Italy. Earth Surface Processes and Landforms 24, p. 1135-1151.","Wyrick, J.R. (2005). On the Formation of Fluvial Islands. PhD Thesis, Oregon State University. USA, 284 p.","https://earthexplorer.usgs.gov/","http://www.geo-spatial.org/download/harile-austriece-1910-reproiectate- in-stereo70"]}
Databáze: OpenAIRE
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