[1] Håkanson L. An ecological risk index for aquatic pollution control: A sedimentological approach[J]. Water Research, 14, 975-1001(1980).

[2] Fernández J A, Carballeira A. Evaluation of contamination, by different elements, in Terrestrial Mosses[J]. Archives of Environmental Contamination and Toxicology, 40, 461-468(2001).

[3] Nemerow N L. Scientific stream pollution analysis[J]. Washington: Scripta Book Co., 210-231(1974).

[5] Cui Z W, Wang Y, Zhao N et al. Spatial distribution and risk assessment of heavy metals in paddy soils of Yongshuyu Irrigation Area from Songhua River Basin, Northeast China[J]. Chinese Geographical Science, 28, 797-809(2018).

[6] Vu C T, Lin C, Shern C C et al. Contamination, ecological risk and source apportionment of heavy metals in sediments and water of a contaminated river in Taiwan[J]. Ecological Indicators, 82, 32-42(2017).

[9] Liu J L, Yang T, Chen Q Y et al. Distribution and potential ecological risk of heavy metals in the typical eco-units of Haihe River Basin[J]. Frontiers of Environmental Science and Engineering, 10, 103-113(2016).

[10] Liu J L, Li Y L, Zhang B et al. Ecological risk of heavy metals in sediments of the Luan River source water[J]. Ecotoxicology, 18, 748-758(2009).

[18] He M C, Wang Z J, Tang H X. The chemical toxicological and ecological studies in assessing the heavy metal pollution in Lean River, China[J]. Water Research, 32, 510-518(1998).

[20] Dauvalter V. Heavy metals in the lake sediments of the Kola Peninsula, Russia[J]. The Science of the Total Environment, 158, 51-61(1994).

[21] Fernandes H M. Heavy metal distribution in sediments and ecological risk assessment: The role of diagenetic processes in reducing metal toxicity in bottom sediments[J]. Environmental Pollution, 97, 317-325(1997).