干旱区生态环境知识资源中心(Arid): Key factors driving dissolved organic matter composition and bioavailability in lakes situated along the Eastern Route of the South-to-North Water Diversion Project, China

Arid

DOI	10.1016/j.watres.2023.119782
	Key factors driving dissolved organic matter composition and bioavailability in lakes situated along the Eastern Route of the South-to-North Water Diversion Project, China
	Zhou, Yongqiang; Chen, Lili; Zhou, Lei; Zhang, Yunlin; Peng, Kai; Gong, Zhijun; Jang, Kyoung-Soon; Spencer, Robert G. M.; Jeppesen, Erik; Brookes, Justin D.; Kothawala, Dolly N.; Wu, Fengchang
通讯作者	Zhou, YQ
来源期刊	WATER RESEARCH
ISSN	0043-1354
EISSN	1879-2448
出版年	2023
卷号	233
英文摘要	The Eastern Route of the South-to-North Water Diversion Project (SNWDP-ER) is a large scale multi-decade infrastructure project aiming to divert substantial amounts of water (approximate to 45 billion m3 yr-1) to alleviate water shortage in comparatively arid regions of northern China. The project has ramifications for hydrological con-nectivity and biogeochemical cycling of dissolved organic matter (DOM) in regional lakes affected by the project. We carried out an extensive field sampling campaign along the SNWDP-ER in different hydrological seasons of 2018 and monthly observations in Lake Hongze and Lake Luoma from April 2018 to June 2021. We found the lakes connecting to the SNWDP-ER had higher mean DOC, specific UV absorbance, higher ratio of humic-like to protein-like fluorophores (Humic : Protein), and shallower spectral slope (S275-295) in the wet season compared to the wet-to-dry transition, and dry seasons. The southern lakes and Yangtze River had lower DOC concen-tration, bioavailable DOC (BDOC), and higher DOM aromaticity compared to the northern two downstream lakes. Ultrahigh-resolution mass spectrometry (FT-ICR MS) revealed higher relative abundance of CHO-containing and aromatic compounds in the Yangtze River and the southern three upstream lakes compared to the northern two lakes. The data from Lake Hongze and Lake Luoma, studied in different hydrological seasons, suggest that water delivery had high consistency in DOM composition and BDOC over the season. We conclude that positioning along the watercourse and seasonally variable hydrological conditions play an important role in influencing the DOM composition and bioavailability of key lakes connecting to the SNWDP-ER. Our results indicated that the water diversion project delivers water with low DOC concentration and higher aromaticity and thus is of higher quality since it has higher DOM removal potential during drinking water treatment.
英文关键词	Water diversion project Dissolved organic matter BDOC DOC FT-ICR MS
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000952465400001
WOS关键词	FLUORESCENCE SPECTROSCOPY ; CARBON ; QUALITY ; BIODEGRADABILITY ; INDICATOR ; TRACKING ; SYSTEMS ; SOILS ; RIVER ; THAW
WOS类目	Engineering, Environmental ; Environmental Sciences ; Water Resources
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/399123
推荐引用方式 GB/T 7714	Zhou, Yongqiang,Chen, Lili,Zhou, Lei,et al. Key factors driving dissolved organic matter composition and bioavailability in lakes situated along the Eastern Route of the South-to-North Water Diversion Project, China[J],2023,233.
APA	Zhou, Yongqiang.,Chen, Lili.,Zhou, Lei.,Zhang, Yunlin.,Peng, Kai.,...&Wu, Fengchang.(2023).Key factors driving dissolved organic matter composition and bioavailability in lakes situated along the Eastern Route of the South-to-North Water Diversion Project, China.WATER RESEARCH,233.
MLA	Zhou, Yongqiang,et al."Key factors driving dissolved organic matter composition and bioavailability in lakes situated along the Eastern Route of the South-to-North Water Diversion Project, China".WATER RESEARCH 233(2023).