气候变化领域集成服务门户(CCPortal): Long-term water quality variations and influencing factors in Dianchi Lake, China

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DOI	10.2166/wrd.2024.013
	Long-term water quality variations and influencing factors in Dianchi Lake, China - insights from 30-year data
	Shen, MoYu; Liao, Anran; Pan, Min; Chen, Zhuo; Lu, Yun; Tao, Yi
发表日期	2024
ISSN	2709-6092
EISSN	2709-6106
英文摘要	Changes in water quality in Dianchi Lake over a long temporal scale have been closely related to climate change and the issuance of governance policies. In this study, the Mann-Kendall test and the Theil-Sen estimation were utilized to examine the average trends of water quality changes at ten monitoring sites within Dianchi Lake over the past 30 years (1989-2018) and the corresponding impacts of policies (including point-source, nonpoint-source (NPS) pollution control, ecological restoration (ER), and enforcement and supervision) and climatic conditions. Analysis of regression curves indicates that NH4+-N and total nitrogen (TN) in Dianchi Lake slightly increased, while total phosphorus (TP), biochemical oxygen demand (BOD5), permanganate index (CODMn), and Chl-a decrease when compared to baseline concentrations at the initial study period. During the medium phase of the study period, policy impacts on water quality were inconspicuous, with certain pollutants exhibiting no relationship with policy issuance, evidenced instead by water temperature-induced fluctuations in Chl-a, which inversely correlated with nutrient trends. During the 11th Five-Year Plan, pollutants including NH4+-N, TN, TP, and CODMn, which reached peak levels, subsequently underwent a marked reduction between 2009 and 2015. This pronounced decrease is likely attributable to the implementation of comprehensive NPS and ER policies during this period.
英文关键词	Dianchi Lake; eutrophication; Mann-Kendall test; Theil-Sen estimation; water quality
语种	英语
WOS研究方向	Engineering ; Water Resources
WOS类目	Engineering, Environmental ; Water Resources
WOS记录号	WOS:001235695300001
来源期刊	WATER REUSE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/295380
作者单位	Suzhou University of Science & Technology; Tsinghua University; Tsinghua University; Tsinghua Shenzhen International Graduate School
推荐引用方式 GB/T 7714	Shen, MoYu,Liao, Anran,Pan, Min,et al. Long-term water quality variations and influencing factors in Dianchi Lake, China - insights from 30-year data[J],2024.
APA	Shen, MoYu,Liao, Anran,Pan, Min,Chen, Zhuo,Lu, Yun,&Tao, Yi.(2024).Long-term water quality variations and influencing factors in Dianchi Lake, China - insights from 30-year data.WATER REUSE.
MLA	Shen, MoYu,et al."Long-term water quality variations and influencing factors in Dianchi Lake, China - insights from 30-year data".WATER REUSE (2024).