气候变化领域集成服务门户(CCPortal): Imprints of COVID-19 lockdown on the surface water quality of Bagmati river basin, Nepal

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DOI	10.1016/j.jenvman.2021.112522
	Imprints of COVID-19 lockdown on the surface water quality of Bagmati river basin, Nepal
	Pant, Ramesh Raj; Bishwakarma, Kiran; Qaiser, Faizan Ur Rehman; Pathak, Lalit; Jayaswal, Gauri; Sapkota, Bhawana; Pal, Khadka Bahadur; Thapa, Lal Bahadur; Koirala, Madan; Rijal, Kedar; Maskey, Rejina
通讯作者	Qaiser, FUR (通讯作者)
发表日期	2021
ISSN	0301-4797
EISSN	1095-8630
卷号	289
英文摘要	COVID-19 pandemic has caused profound impacts on human life and the environment including freshwater ecosystems globally. Despite the various impacts, the pandemic has improved the quality of the environment and thereby creating an opportunity to restore the degraded ecosystems. This study presents the imprints of COVID-19 lockdown on the surface water quality and chemical characteristics of the urban-based Bagmati River Basin (BRB), Nepal. A total of 50 water samples were collected from 25 sites of BRB during the monsoon season, in 2019 and 2020. The water temperature, pH, electrical conductivity, total dissolved solids, dissolved oxygen (DO), and turbidity were measured in-situ, while the major ions, total hardness, biological oxygen demand (BOD), and chemical oxygen demand (COD) were analyzed in the laboratory. The results revealed neutral to mildly alkaline waters with relatively moderate mineralization and dissolved chemical constituents in the BRB. The average ionic abundance followed the order of Ca2+ > Na+ > Mg2+ > K+ > NH4+ for cations and HCO3- > Cl- > SO42- > NO3- > PO43- for anions. Comparing to the pre-lockdown, the level of DO was increased by 1.5 times, whereas the BOD and COD were decreased by 1.5 and 1.9 times, respectively during the post-lockdown indicating the improvement of the quality water which was also supported by the results of multivariate statistical analyses. This study confirms that the remarkable recovery of degraded aquatic ecosystems is possible with limiting anthropic activities.
关键词	CHEMISTRY
英文关键词	COVID-19 pandemic; Lockdown; Chemical characterization; Organic pollution; Water quality; Bagmati river
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000645569400005
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260397
推荐引用方式 GB/T 7714	Pant, Ramesh Raj,Bishwakarma, Kiran,Qaiser, Faizan Ur Rehman,et al. Imprints of COVID-19 lockdown on the surface water quality of Bagmati river basin, Nepal[J]. 中国科学院青藏高原研究所,2021,289.
APA	Pant, Ramesh Raj.,Bishwakarma, Kiran.,Qaiser, Faizan Ur Rehman.,Pathak, Lalit.,Jayaswal, Gauri.,...&Maskey, Rejina.(2021).Imprints of COVID-19 lockdown on the surface water quality of Bagmati river basin, Nepal.JOURNAL OF ENVIRONMENTAL MANAGEMENT,289.
MLA	Pant, Ramesh Raj,et al."Imprints of COVID-19 lockdown on the surface water quality of Bagmati river basin, Nepal".JOURNAL OF ENVIRONMENTAL MANAGEMENT 289(2021).