Don River Delta hydrological and geomorphological transformation under anthropogenic and natural forcings. Dynamics of delta shoreline, risk of coastal flooding and related management options

Venevsky, Sergey; Berdnikov, Sergey; Day, John W.; Sorokina, Vera; Gong, Peng; Kleshchenkov, Aleksey; Kulygin, Valerii; Li, Wenyu; Misirov, Samir; Sheverdyaev, Igor; Yuan, Cui

doi:10.1016/j.ocecoaman.2024.107364

Ocean & Coastal Management

2024

DOI: 10.1016/j.ocecoaman.2024.107364

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Don River Delta hydrological and geomorphological transformation under anthropogenic and natural forcings. Dynamics of delta shoreline, risk of coastal flooding and related management options

Sergey Venevsky,

Sergey Berdnikov,

John W. Day

et al.

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Cited by 2 publications

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Pollution and Ecological Risk Assessment of Potentially Toxic Elements in Sediments Along the Fluvial-to-Marine Transition Zone of the Don River

Konstantinova,

Minkina,

Nevidomskaya

et al. 2024

Water

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The quality of sediments in the mixing zone of river freshwater and marine saline water as an important geochemical barrier for potentially toxic elements (PTEs) remains poorly understood. This study aims to analyze the current pollution with PTEs and associated ecological risks in sediments of the Don River delta and the surrounding area of the Taganrog Bay of the Sea of Azov (Russia). The PTE content was determined in fifty-four collected samples using the WDXRF and assessed using geochemical and ecotoxicological indicators. The source of Cr, Mn, Ni and Pb is mainly river runoff, and Cu, Zn and Cd are from a variety of anthropogenic sources. As shown by the assessment of the geoaccumulation index (Igeo), single pollution index (PI) and contamination factor (CF), these elements are the priority pollutants. According to these estimates, high and very high contamination of sediments in the estuarine zone of the Don River with Cd and Pb was detected in 72–94% and 2–57% of samples, respectively. However, environmental risks are determined almost exclusively by the level of Cd. Total contamination as assessed by the Nemerow pollution index (NPI), modified degree of contamination (mCd) and metal pollution index (MPI) is of concern in 83–98% of the samples studied. The most heavily polluted sediments are in the vicinity of residential areas of the Taganrog Bay. Despite the lower average pollution levels of deltaic sediments, freshwater biota are exposed to higher potential toxic risks of adverse effects by PTE, particularly from Ni and Pb. Thus, the complex hydrological regime and uneven anthropogenic impact predetermine the geochemical state of the sediments of the estuarine zone of the Don River.

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Pollution and Ecological Risk Assessment of Potentially Toxic Elements in Sediments Along the Fluvial-to-Marine Transition Zone of the Don River

Konstantinova,

Minkina,

Nevidomskaya

et al. 2024

Water

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The Sea of Azov’s Hydrodynamic Response to Different Atmospheric Forcing Resolutions

Korshenko,

Panasenkova,

Fomin

2024

Water

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This article is devoted to the analysis of the simulated meteorological and hydrodynamic characteristics of the Sea of Azov using the WRF (Weather Research and Forecasting) model and INMOM (Institute of Numerical Mathematics Ocean Model). The goal is to investigate the sea’s response to atmospheric forcing using two different horizontal resolutions. A comparison of the atmospheric simulation results with available meteorological in situ data from the land-based hydrometeorological stations (HMSs) did not reveal any significant differences between the simulations with different atmospheric forcing resolutions. A spatiotemporal analysis of the WRF model and INMOM results showed the most prominent differences along the entire coastal zone, especially in Taganrog Bay, along the spits in the north part of the sea, and in the Kerch Strait. Here, the wind speed obtained at a high spatial resolution (3.3 km) was ~10–15% higher than that obtained at a coarse resolution (10 km), and the surface and bottom currents were up to ~40% and ~15% higher. In marine coastal zones, the greatest differences were noted in a band of ~5 km, and differences in the rest of the Sea of Azov were negligible. An analysis of the bottom current speed revealed the presence of a counter-current flowing into Taganrog Bay. This shows the necessity of using three-dimensional marine circulation models to study the Sea of Azov’s dynamics.

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Don River Delta hydrological and geomorphological transformation under anthropogenic and natural forcings. Dynamics of delta shoreline, risk of coastal flooding and related management options

Cited by 2 publications

References 28 publications

Pollution and Ecological Risk Assessment of Potentially Toxic Elements in Sediments Along the Fluvial-to-Marine Transition Zone of the Don River

Pollution and Ecological Risk Assessment of Potentially Toxic Elements in Sediments Along the Fluvial-to-Marine Transition Zone of the Don River

The Sea of Azov’s Hydrodynamic Response to Different Atmospheric Forcing Resolutions

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