The impact of large dams on fluvial sedimentation: The Iron Gates Reservoir on the Danube River

Constantin Nistor; Ionuț Săvulescu; Bogdan-Andrei Mihai; Liliana Zaharia; Marina Vîrghileanu; Sorin Carablaisă

doi:10.3986/AGS.7856

Avtorji

Constantin Nistor University of Bucharest, Faculty of Geography, Department of Geomorphology, Pedology, and Geomatics, Bucharest, Romania https://orcid.org/0000-0003-1978-9980
Ionuț Săvulescu University of Bucharest, Faculty of Geography, Department of Geomorphology, Pedology, and Geomatics, Bucharest, Romania https://orcid.org/0000-0001-6054-7954
Bogdan-Andrei Mihai University of Bucharest, Faculty of Geography, Department of Geomorphology, Pedology, and Geomatics, Bucharest, Romania https://orcid.org/0000-0002-5834-8697
Liliana Zaharia University of Bucharest, Faculty of Geography, Department of Meteorology and Hydrology, Bucharest, Romania https://orcid.org/0000-0003-3069-0113
Marina Vîrghileanu University of Bucharest, Faculty of Geography, Department of Geomorphology, Pedology, and Geomatics, Bucharest, Romania http://orcid.org/0000-0003-4665-9620
Sorin Carablaisă University of Bucharest, Orșova Geographical Research Station Center, Bucharest, Romania

DOI:

https://doi.org/10.3986/AGS.7856

Ključne besede:

jez hidroelektrarne, akumulacija Železna vrata, sedimentacija, topografija, zaliv Cerna, reka Donava

Povzetek

Gradnja jezov je eden največjih človeških pritiskov, ki zaradi spremembe pretočnega režima izrečnega v rečno-jezerskega vplivajo na rečne procese, vključno s topografijo in vodno-sedimentnimi tokovi. Namen prispevka je raziskati geomorfne spremembe znotraj zajezitve Železna vrata I, največje zajezitve nareki Donavi, ki je bila dokončana leta 1972 in je namenjena proizvodnji hidroenergije ter plovbi. Študija se osredotoča na zaliv, ki je nastal ob izlivu reke Cerne v akumulacijsko jezero, s poudarkom na prostorskih spremembah v topografiji in razporeditvi usedlin. Raziskava temelji na diahroni analizi dveh nizov podatkov pred in po zgradbi jezu: prvi je bil izvzet iz zgodovinskih topografskih zemljevidov, drugi pa pridobljen z batimetrično sonarsko raziskavo, integrirano v GIS okolju. Rezultati razkrivajo prevlado sedimentacije z debelino aluvialnega sloja do 14m. Sedanji vzorec sedimenta je spremenil potopljeno morfologijo, kar je povzročilo nastanek vršaja ob ustju reke Cerne in sedimentnih nanosov med zalivom Cerna in Donavo. Proces siltacije skupaj z današnjo podvodno morfologijo omejuje ladijski rečni promet in tudi sedimentno zmogljivost akumulacije.

Prenosi

Podatki o prenosih še niso na voljo.

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