Evolution of the Danube River’s islands on the Bulgaria-Romania border over the last century DOI Creative Commons
Gabriela Ioana‐Toroimac, Marina Vîrghileanu

PLoS ONE, Journal Year: 2025, Volume and Issue: 20(1), P. e0317711 - e0317711

Published: Jan. 30, 2025

The border line between Bulgaria and Romania was established a century ago on the Danube River’s thalweg, going around islands. Over time, islands migrated; to avoid conflicts, located are declared neutral territory by both countries they exit from use. In this context, paper aims draw conclusions spatial dynamics of sandy along Bulgaria-Romania border. This approach is mostly GIS work various documents over last century, with interpretations specific fluvial geomorphology. Our showed patterns evolution (i) trajectory half can be reconstituted (i.e., merging each other and/or migrated). redrawn century. form dimensions did not statistically change at any time scale. (ii) At scale decades, we noticed slow formation bars lee deposition due sediment excess then migration alluvial until an island or bank, followed stabilization vegetation recruitment. (iii) Islands their migrated countries’ line, but in time. invites national authorities periodically inventory geomorphological bars, transfer decision-making process for stable local order put them into green use benefits communities.

Language: Английский

Shifted Flood and Ecology Regimes Due To Channel Bar Greening and Increased Flow Resistance in a Large Dammed River DOI Creative Commons
Yong Hu, Jinyun Deng, Dongfeng Li

et al.

Geophysical Research Letters, Journal Year: 2024, Volume and Issue: 51(20)

Published: Oct. 21, 2024

Abstract Damming profoundly affects downstream flow‐sediment regimes, altering channel bar dynamics and thereby affecting floods riverine biodiversity. Here, we investigate the response of bars to upstream damming by examining patterns, mechanisms, impacts in Middle Yangtze River (∼1,000 km). Over a decade post‐damming observational data reveal substantial increases revegetation Leaf Area Index. Shorter flood duration stable size collectively drive greening. Consequently, denser vegetation has slowed flow velocity 17% ± 2% increased resistance 21% 5%, offsetting water‐level decrease from expansion due scouring even causing slight rise floodwater levels. Furthermore, markedly altered river connectivity, thermal solute dynamics, detrimentally fish habitats aquatic life. These findings, along with refined stage simulation considering flow‐sediment‐vegetation interactions, facilitate sustainable reservoir operation management big systems.

Language: Английский

Citations

4
Evolution of the Danube River’s islands on the Bulgaria-Romania border over the last century DOI Creative Commons
Gabriela Ioana‐Toroimac, Marina Vîrghileanu

PLoS ONE, Journal Year: 2025, Volume and Issue: 20(1), P. e0317711 - e0317711

Published: Jan. 30, 2025

The border line between Bulgaria and Romania was established a century ago on the Danube River’s thalweg, going around islands. Over time, islands migrated; to avoid conflicts, located are declared neutral territory by both countries they exit from use. In this context, paper aims draw conclusions spatial dynamics of sandy along Bulgaria-Romania border. This approach is mostly GIS work various documents over last century, with interpretations specific fluvial geomorphology. Our showed patterns evolution (i) trajectory half can be reconstituted (i.e., merging each other and/or migrated). redrawn century. form dimensions did not statistically change at any time scale. (ii) At scale decades, we noticed slow formation bars lee deposition due sediment excess then migration alluvial until an island or bank, followed stabilization vegetation recruitment. (iii) Islands their migrated countries’ line, but in time. invites national authorities periodically inventory geomorphological bars, transfer decision-making process for stable local order put them into green use benefits communities.

Language: Английский

Citations

0