A new comprehensive ecological risk index for risk assessment on Luanhe River, China
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With the enhancement of human activities which influence the physical and chemical integrity of ecosystem, it was bound to increase ecological risk to the ecosystem, and the risk assessment of small scale, single pollutant, or only on water quality have been not satisfied the demand of sustainable development of basin water environment. Based on the response relationship between environmental flow requirements guarantee ratio (GEF) and river ecological risk index (ERI), the Sediment Quality Guideline Quotient index (SQG-Q), and the Biotic Index (BI), we construct a new comprehensive ecological risk index (CERI) to evaluate the ecological risk of Luanhe River, China. According to the response relationship between GEF and ERI, upper and lower reaches of Luanhe River (Goutaizi to Hanjiaying) were at moderate risk level (0.41 < ERI < 0.56) in dry season, and all sites were at low risk level (ERI < 0.40) in wet season; considering the contribution of heavy metals contamination in the SQG-Q, the Luanhe River was the most influenced by higher levels of heavy metals in dry season and wet season; when this index was applied to the PAHs levels, only 30 and 20% of the sampling sites appeared to be moderately impacted (0.1 < SQG-Q PAHs < 0.5) by the PAHs in dry season and wet season, respectively. The results of BI showed that half of the sites appeared to be at moderately polluted level (50% of the sites, 0.25 < BI < 0.32) and heavily polluted level (Zhangbaiwan, BI = 0.36) in dry season, and 40% of the sites appeared to be at moderately polluted level (0.26 < BI < 0.29) in wet season. The CERI showed that 70 and 30% of the sites were at moderate risk level in dry season (0.25 < CERI < 0.36) and wet season (0.26 < CERI < 0.29), respectively. The results could give insight into risk assessment of water environment and decision-making for water source security.
KeywordsLuanhe River Ecological risk assessment Contaminant Sediments
This study was supported by Research and Development of Ecological Water supplement and Eco-Hydrological Regulation Technology of Degraded Wetland (2016YFC0500402), the National Water Pollution Control Major Project of China (2012ZX07203-006) and The National Natural Science Foundation of China (No. 41271496). We acknowledge Professor Xianguo Lv from Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, and Professor Baoqing Shan from Research Center for Eco-Environmental Sciences, Chinese Academic of Sciences. We are indebted to all the people who helped with the sampling.
- Acquavita, A., Falomo, J., Predonzani, S., Tamberlich, F., Bettoso, N., & Mattassi, G. (2014). The PAH level, distribution and composition in surface sediments from a Mediterranean Lagoon: The Marano and Grado Lagoon (Northern Adriatic Sea, Italy). Marine Pollution Bulletin, 81, 234–241.CrossRefGoogle Scholar
- Hao, H., Gao, B., Wang, J. K., Zhou, H. D., Lu, J., Yin, S. H., et al. (2012). Distribution characteristic and potential ecological risk assessment of heavy metals in sediments of the Luanhe River. Rock and Mineral Analysis, 31, 1000–1005.Google Scholar
- Kanzari, F., Syakti, A. D., Asia, L., Malleret, L., Piram, A., Mille, G., et al. (2014). Distributions and sources of persistent organic pollutants (aliphatic hydrocarbons, PAHs, PCBs and pesticides) in surface sediments of an industrialized urban river (Huveaune), France. Science of the Total Environment, 478, 141–151.CrossRefGoogle Scholar
- Liu, Z. Y., He, L. X., Lu, Y. Z., Su, J., Song, H., Zeng, X. Y., et al. (2015). Distribution, source, and ecological risk assessment of polycyclic aromatic hydrocarbons (PAHs) in surface sediments from the Hun River, northeast China. Environmental Monitoring and Assessment, 187, 290.CrossRefGoogle Scholar
- MacDonald, D. D., Carr, R. S., Eckenrod, D., Greening, H., Grabe, S., Ingersoll, C. G., et al. (2004). Development, evaluation, and application of sediment quality targets for assessing and managing contaminated sediments in Tampa Bay, Florida. Archives of Environmental Contamination and Toxicology, 46, 147–161.Google Scholar
- Song, G. F., & Shen, B. (2012). Research on river eco-environmental water requirements based on water function regionalization. Journal of Xi’an University of Technology, 1, 49–55.Google Scholar
- Yuan, K., Wang, X. W., Lin, L., Zou, S. C., Li, Y., Yang, Q. S., et al. (2015). Characterizing the parent and alkyl polycyclic aromatic hydrocarbons in the Pearl River Estuary, Daya Bay and northern South China Sea: Influence of riverine input. Environmental Pollution, 199, 66–72.CrossRefGoogle Scholar
- Zhang, G. G. (2015). Characterization and ecological risk assessment of nutrients and heavy metal pollution in the surface sediments of Dongting Lake. Journal of Hydroecology, 36, 25–31.Google Scholar