title: Comprehensive assessment of seldom monitored trace elements pollution in the riparian soils of the Miyun Reservoir, China.
abstract: The South-to-North Water Diversion Project has aroused widespread concerns about the potential ecological risks posed by the project, especially for the Miyun Reservoir (MYR). The potential release risk of metals from the flooded riparian soils into MYR after water impoundment is one of key scientific problems. In this study, riparian soil samples were collected considering three vertical heights (130, 140, and 145 m) and four types of land uses in the MYR areas, namely, forestland, grassland, wasteland, and recreational land. We analyzed soils texture, the content and chemical fractionations of seldom monitored trace elements (SMTEs): Li, Be, B, V, Co, Ni, Ga, Sn, Sb, Tl, and Bi). Results showed that the four types of soils in MYR had the similar textures, while recreational land showed significantly higher contents of Ni and V. Additionally, there were no significant differences found for most SMTEs (except for V) at different vertical heights in each soil type, while the concentrations of V at 140 and 145 m in forestland and recreational land were significantly higher than those at 130 m. However, a comprehensive evaluation of potential ecological risk (contamination factor (CF), modified degree of contamination (mCd), and geoaccumulation factor (Igeo)) consistently indicated the insignificant contaminations of all SMTEs in MYR soils before water impoundment. The Community Bureau of Reference (BCR) sequential extraction results showed that the chemical fractionations of SMTEs were independent of land use patterns and vertical heights. Co in reducible fractions and Ni were identified as the candidates which had potential to release into MYR when the lands were submerged. Principal component analysis (PCA) and cluster analysis (CA) results suggested that a portion of V, Co, and Ni may originate from anthropogenic activities, and the coal combustion was possibly the main anthropogenic source. The findings of this work would provide valuable information on the environment management of MYR and offer a reference for the investigation on the effect of water impoundment on potential release risk of SMTEs in MYR.
authors.affiliation: State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China.|State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China.
authors.forename: Lanfang
authors.initials: L
authors.lastname: Han
authors.affiliation: State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China. gaosky34@hotmail.com.
authors.forename: Bo
authors.initials: B
authors.lastname: Gao
authors.affiliation: Faculty of Engineering, University of Regina, S4S 0A2, Regina, SK, Canada.|Institute for Energy, Environment and Sustainable Communities, University of Regina, S4S 0A2, Regina, SK, Canada.
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China.
authors.forename: Dongyu
authors.initials: D
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China.
authors.forename: Li
authors.initials: L
authors.lastname: Gao
authors.affiliation: State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Yu
authors.affiliation: State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China.
authors.forename: Shiyan
authors.initials: S
authors.lastname: Wang
mesh_terms: D005591:Chemical Fractionation; D002681:China; D004784:Environmental Monitoring / Q000379:methods*; D055868:Floods; D019216:Metals, Heavy / Q000032:analysis; D019565:Metals, Light / Q000032:analysis; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*; D014131:Trace Elements / Q000032:analysis*; D062066:Water Resources
chemical_list: D019216:Metals, Heavy; D019565:Metals, Light; D012987:Soil; D012989:Soil Pollutants; D014131:Trace Elements
keywords: Beijing; Land use; Miyun Reservoir; Riparian zone; Seldom monitored trace elements; Soil