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Contamination and Ecological Risk Assessment of Long-Term Polluted Sediments with Heavy Metals in Small Hydropower Cascade

Author

Listed:
  • Yovana Todorova

    (Sofia University “St. Kliment Ohridski”)

  • Stilyana Lincheva

    (Sofia University “St. Kliment Ohridski”)

  • Ivaylo Yotinov

    (Sofia University “St. Kliment Ohridski”)

  • Yana Topalova

    (Sofia University “St. Kliment Ohridski”)

Abstract

The identification of contamination level and ecological risks, associated with heavy metal pollution of sediments in small hydropower cascade was done on the base of index analyses approach. The concentration of As, Cd, Cu, Hg, Pb, Zn, total organic carbon and percentage of fines were determined in sediments of two habitats in cascade sequence – river and dam. Correlation and multivariate analyses suggest that As, Cu, Pb and Zn are associated with similar anthropogenic source. Cadmium and mercury originate from different source and have specific moving. Based on the contamination and background indices the sediments in Middle Iskar cascade are moderate contaminated at least and are subject of intensive hydrological and technological mixing. The potential ecological risk index (PERI) classifies the sediments in dam site with the higher risk level. Suitable indicators for express assessment of metal pollution in “river” sediments are contamination/enrichment indices which are more sensitive for local concentration increase of less toxic metals. In “dam” sites the process of sedimentation affects strongly the degree of metals accumulation and differences in toxicity are clearly presented – PER/PERI in combination with content of fine sediment fractions and TOC have a potential for rapid identification of sediment-associated risks.

Suggested Citation

  • Yovana Todorova & Stilyana Lincheva & Ivaylo Yotinov & Yana Topalova, 2016. "Contamination and Ecological Risk Assessment of Long-Term Polluted Sediments with Heavy Metals in Small Hydropower Cascade," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 30(12), pages 4171-4184, September.
    • Handle: RePEc:spr:waterr:v:30:y:2016:i:12:d:10.1007_s11269-016-1413-8
    DOI: 10.1007/s11269-016-1413-8
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    References listed on IDEAS

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    1. Jinglu Wu & Haiao Zeng & Hong Yu & Long Ma & Longsheng Xu & Boqiang Qin, 2012. "Water and Sediment Quality in Lakes along the Middle and Lower Reaches of the Yangtze River, China," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 26(12), pages 3601-3618, September.
    2. P. Singh & Virendra Kumar & R. Purohit & Mahesh Kothari & P. Dashora, 2009. "Application of Principal Component Analysis in Grouping Geomorphic Parameters for Hydrologic Modeling," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 23(2), pages 325-339, January.
    3. Andre Ferreira & Ramesh Teegavarapu, 2012. "Optimal and Adaptive Operation of a Hydropower System with Unit Commitment and Water Quality Constraints," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 26(3), pages 707-732, February.
    4. Manish Goyal & Vishal Singh & Akshay Meena, 2015. "Geospatial and hydrological modeling to assess hydropower potential zones and site location over rainfall dependent Inland catchment," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 29(8), pages 2875-2894, June.
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    Cited by:

    1. Beibei Shen & Jinglu Wu & Shuie Zhan & Miao Jin, 2022. "Spatial Distributions, Sources and Risk Assessment of Toxic Elements in Waters of a Central Asian Basin," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 36(15), pages 6187-6203, December.
    2. Elica Valkova & Vasil Atanasov & Milena Tzanova & Stefka Atanassova & Ivaylo Sirakov & Katya Velichkova & Margarita H. Marinova & Kristian Yakimov, 2022. "Content of Pb and Zn in Sediments and Hydrobionts as Ecological Markers for Pollution Assessment of Freshwater Objects in Bulgaria—A Review," IJERPH, MDPI, vol. 19(15), pages 1-25, August.
    3. Yafei Wu & Ke Hu & Yaofeng Han & Qilin Sheng & Ya Fang, 2020. "Spatial Characteristics of Life Expectancy and Geographical Detection of Its Influencing Factors in China," IJERPH, MDPI, vol. 17(3), pages 1-15, February.
    4. Kuriqi, Alban & Pinheiro, António N. & Sordo-Ward, Alvaro & Bejarano, María D. & Garrote, Luis, 2021. "Ecological impacts of run-of-river hydropower plants—Current status and future prospects on the brink of energy transition," Renewable and Sustainable Energy Reviews, Elsevier, vol. 142(C).

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