Eurasian Journal of Soil Science

Zhao,C., Dong ,S., Liu,S., Sylvie,I., Li,J., Liu,Q., Wang,C., 2015. Spatial distribution and environmental risk of major elements in surface sediments associated Manwan Dam in Lancang River, China. Eurasian J Soil Sci 4(1):22 - 29. DOI : 10.18393/ejss.37849

Zhao,C.Dong ,S.,Liu,S.Sylvie,I.Li,J.Liu,Q.,& Wang,C. Spatial distribution and environmental risk of major elements in surface sediments associated Manwan Dam in Lancang River, China Eurasian Journal of Soil Science, DOI : 10.18393/ejss.37849

Zhao,C.Dong ,S.,Liu,S.Sylvie,I.Li,J.Liu,Q., and ,Wang,C."Spatial distribution and environmental risk of major elements in surface sediments associated Manwan Dam in Lancang River, China" Eurasian Journal of Soil Science, DOI : 10.18393/ejss.37849

Zhao,C.Dong ,S.,Liu,S.Sylvie,I.Li,J.Liu,Q., and ,Wang,C. "Spatial distribution and environmental risk of major elements in surface sediments associated Manwan Dam in Lancang River, China" Eurasian Journal of Soil Science, DOI : 10.18393/ejss.37849

C,Zhao.S,Dong .S,Liu.I,Sylvie.J,Li.Q,Liu.C,Wang "Spatial distribution and environmental risk of major elements in surface sediments associated Manwan Dam in Lancang River, China" Eurasian J. Soil Sci, vol., no., pp., DOI : 10.18393/ejss.37849

Zhao,Chen ;Dong ,Shikui ;Liu,Shiliang ;Sylvie,Isange ;Li,Jinpeng ;Liu,Qi ;Wang,Cong Spatial distribution and environmental risk of major elements in surface sediments associated Manwan Dam in Lancang River, China. Eurasian Journal of Soil Science,. DOI : 10.18393/ejss.37849

How to cite

Zhao, C., Dong , S., Liu, S., Sylvie, I., Li, J., Liu, Q., Wang, C., 2015. Spatial distribution and environmental risk of major elements in surface sediments associated Manwan Dam in Lancang River, China. Eurasian J. Soil Sci. 4(1): 22 - 29. DOI : 10.18393/ejss.37849

Author information

Chen Zhao , Beijing Normal University, School of Environment, Beijing, China
Shikui Dong , Beijing Normal University, School of Environment, Beijing, China
Shiliang Liu , Beijing Normal University, School of Environment, Beijing, China
Isange Sylvie , Beijing Normal University, School of Environment, Beijing, China
Jinpeng Li , Beijing Normal University, School of Environment, Beijing, China
Qi Liu , Beijing Normal University, School of Environment, Beijing, China
Cong Wang , Beijing Normal University, School of Environment, Beijing, China

Publication information

Issue published online: 01 Jan 2015
Article first published online : 06 Dec 2014
Manuscript Accepted : 22 Nov 2014
Manuscript Received: 13 Jul 2014
DOI: 10.18393/ejss.37849
Stable URL: http://ejss.fesss.org/10.18393/ejss.37849

Abstract

Bulk elements and grain sizes in sediments collected at upstream and downstream of Manwan Dam were studied to demonstrate the spatial distribution of heavy metals in the sediments and to assess their risk. Correlation analysis showed that the spatial distribution of Cd, Zn and Mg were significantly affected by dam construction. PCA analysis demonstrate that Cd and Zn were both controlled by Ca, As, Pb, organic matter and clay. Mg was controlled by silt, Al, P and K. The risk assessment demonstrated that the pollution of Cd, As, Zn were more serious than other heavy metals. Fine-grained sediments with higher risk level were found in the section near the upstream of dam, while coarse-grained ones with lower risk level were found in the section far away from the downstream of dam. The sections in tributary were lower in risk than those in the main stream. Heavy metal concentrations in the mainstream sediments were influenced by dam construction and those in tributary were influenced by both dam construction and human activities in locality. Unusual high concentrations of Cd, As, and Zn in both sections implied that more pollution prevention measures are needed in the Manwan Dam in order to prevent increased heavy metal pollutions in the Lancang-Mekong River.

Keywords

Manwan Dam, elements, spatial distribution, environmental risk

Corresponding author

References

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Abstract
Bulk elements and grain sizes in sediments collected at upstream and downstream of Manwan Dam were studied to demonstrate the spatial distribution of heavy metals in the sediments and to assess their risk. Correlation analysis showed that the spatial distribution of Cd, Zn and Mg were significantly affected by dam construction. PCA analysis demonstrate that Cd and Zn were both controlled by Ca, As, Pb, organic matter and clay. Mg was controlled by silt, Al, P and K. The risk assessment demonstrated that the pollution of Cd, As, Zn were more serious than other heavy metals. Fine-grained sediments with higher risk level were found in the section near the upstream of dam, while coarse-grained ones with lower risk level were found in the section far away from the downstream of dam. The sections in tributary were lower in risk than those in the main stream. Heavy metal concentrations in the mainstream sediments were influenced by dam construction and those in tributary were influenced by both dam construction and human activities in locality. Unusual high concentrations of Cd, As, and Zn in both sections implied that more pollution prevention measures are needed in the Manwan Dam in order to prevent increased heavy metal pollutions in the Lancang-Mekong River.

Keywords: Manwan Dam, elements, spatial distribution, environmental risk

References