Vertical profiles of phosphorus fractions in the sediment in a chain of reservoirs in North China: Implications for pollution source, bioavailability, and eutrophication

	Vertical profiles of phosphorus fractions in the sediment in a chain of reservoirs in North China: Implications for pollution source, bioavailability, and eutrophication
	Wen, Shuailong; Wang, Hongwei; Wu, Tao; Yang, Jie; Jiang, Xue; Zhong, Jicheng
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2020
卷号	704
英文摘要	The level of eutrophication in reservoirs is dependent on their internal and external P loads. Identifying the P pollution characteristics and its fractional composition in sediments is therefore necessary to determine the potential bioavailability and dominant sources of P for effective water pollution control. In this study, we investigated the P pollution characteristics in the overlying water and sediment in a chain of reservoirs (the Panjiakou (PJK), Daheiting (DHT) and Yucjiao (YQ) Reservoirs) in North China. Our results showed that the P concentrations in the overlying water of the YQ Reservoir was higher than that of the PJK and DHT Reservoirs, but the sediment P loading and P bio-availability were lower than the PJK and DHT Reservoirs. However, the sediment P release risk in the YQ Reservoir was higher than the DHT and PJK Reservoirs. The YQ Reservoir was mainly polluted by internal sediment P release and external sources predominantly derived from the inflowing polluted Sha River Basin. Various forms of P in the DHT Reservoir decreased with depth, and the P in the overlying water column was mainly sourced from internal P release due to sediment accumulation of excess P from human activities. In recent years, the proportion of bio-available P (BAP) in the PJK and YQ Reservoirs had increased, and the proportion of the more inert Al-P and Ca-P in the PJK Reservoir decreased. Ca-P in the YQ Reservoir had also decreased, indicating that inert P has been gradually transformed into active P in the PJK and YQ Reservoirs in recent years. The observed differences in P loading and sedimentary P fractions indicate different pollution characteristics and sources between the three reservoirs. We therefore recommend site-specific remediation strategies for effective control on P pollution in the three eutrophic reservoirs. (C) 2019 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://159.226.73.51/handle/332005/20213]
专题	中国科学院南京地理与湖泊研究所
推荐引用方式 GB/T 7714	Wen, Shuailong,Wang, Hongwei,Wu, Tao,et al. Vertical profiles of phosphorus fractions in the sediment in a chain of reservoirs in North China: Implications for pollution source, bioavailability, and eutrophication[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,704.
APA	Wen, Shuailong,Wang, Hongwei,Wu, Tao,Yang, Jie,Jiang, Xue,&Zhong, Jicheng.(2020).Vertical profiles of phosphorus fractions in the sediment in a chain of reservoirs in North China: Implications for pollution source, bioavailability, and eutrophication.SCIENCE OF THE TOTAL ENVIRONMENT,704.
MLA	Wen, Shuailong,et al."Vertical profiles of phosphorus fractions in the sediment in a chain of reservoirs in North China: Implications for pollution source, bioavailability, and eutrophication".SCIENCE OF THE TOTAL ENVIRONMENT 704(2020).