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Research on the Sustainable Development of the Bistrita Ardeleana River in Order to Stop the Erosion of the Riverbanks and the Thalweg

Author

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  • Aurelian Cosmin Moldovan

    (Faculty of Materials and Environmental Engineering, Department of Environment Engineering and Entrepreneurship of Sustainable Development, Technical University of Cluj-Napoca, 103-105 Muncii Blvd., 400641 Cluj-Napoca, Romania)

  • Tomi Alexandrel Hrăniciuc

    (Faculty of Hydrotechnics, Geodesy and Environmental Engineering, “Gheorghe Asachi” Technical University of Iasi, Dimitrie Mangeron Blvd. nr. 65, 70050 Iasi, Romania)

  • Valer Micle

    (Faculty of Materials and Environmental Engineering, Department of Environment Engineering and Entrepreneurship of Sustainable Development, Technical University of Cluj-Napoca, 103-105 Muncii Blvd., 400641 Cluj-Napoca, Romania)

  • Nicolae Marcoie

    (Faculty of Hydrotechnics, Geodesy and Environmental Engineering, “Gheorghe Asachi” Technical University of Iasi, Dimitrie Mangeron Blvd. nr. 65, 70050 Iasi, Romania)

Abstract

The impact of dams and reservoirs on the aquatic ecosystem of rivers is a very important topic for water resource management. These hydrotechnical facilities change the natural hydromorphological regime of the rivers. This paper analyzed the hydrodynamic characteristics of an undeveloped riverbed section downstream of the Colibița reservoir, from the Bistrita Ardeleana River hydrographic basin. After processing the data obtained on the field, two hydraulic models were made using the MIKE 11 program, which aimed to identify the hydraulic parameters such as the wet section, the depth, and the water velocity. The first modeling was used for the flow rate of Q = 54.5 m 3 /s: the water depth was between 1.952 m and 2.559 m; and the water velocity varied between 1.148 m/s and 1.849 m/s. The second modeling was used for a flow rate of Q = 178 m 3 /s and showed that the water depth had values between 3.701 m and 4.427 m; and the water velocity varied between 1.316 m/s and 2.223 m/s. Following the granulometric analysis, the average diameter of the particle in the thalweg was D50 = 25.18 mm. The conclusion reached as a result of hydraulic modeling and granulometric analyses indicated that hydromorphological processes take place along the length of the analyzed sector, which have negative effects on water quality as well as on the instability of the riverbed. To make the riverbed safe along the entire studied length, we managed to identify some alternative solutions that have the role of stabilizing the banks, respectively, to stop the deepening of the thalweg. The alternative hydrotechnical constructions will increase the roughness of the riverbed, essentially reducing the water speed and increasing the favorable conditions for the retention of alluvium.

Suggested Citation

  • Aurelian Cosmin Moldovan & Tomi Alexandrel Hrăniciuc & Valer Micle & Nicolae Marcoie, 2023. "Research on the Sustainable Development of the Bistrita Ardeleana River in Order to Stop the Erosion of the Riverbanks and the Thalweg," Sustainability, MDPI, vol. 15(9), pages 1-22, April.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:9:p:7431-:d:1137326
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    References listed on IDEAS

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    1. Aloyce Amasi & Maarten Wynants & William Blake & Kelvin Mtei, 2021. "Drivers, Impacts and Mitigation of Increased Sedimentation in the Hydropower Reservoirs of East Africa," Land, MDPI, vol. 10(6), pages 1-22, June.
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    4. Xuan Zhang & Changling Fang & Yuan Wang & Xiaoyi Lou & Ying Su & Dongmei Huang, 2022. "Review of Effects of Dam Construction on the Ecosystems of River Estuary and Nearby Marine Areas," Sustainability, MDPI, vol. 14(10), pages 1-16, May.
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    6. Jacek Florek & Maciej Wyrębek, 2023. "Procedure of Numerical Modelling and Estimation of Sieve Curve Changes as a Tool to Define Riverbed’s Erodibility," Sustainability, MDPI, vol. 15(2), pages 1-13, January.
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