干旱区生态环境知识资源中心(Arid): The Response of Carbonate System to Watershed Urbanization Process in a Semi-Arid River

Arid

DOI	10.1007/s11802-024-5674-1
	The Response of Carbonate System to Watershed Urbanization Process in a Semi-Arid River
	Li, Yunxiao; Dang, Jiajia; Huang, Xiao; Yang, Hong; Wang, Xiao; Li, Lina; Bai, Jie; Chen, Xi
通讯作者	Huang, X
来源期刊	JOURNAL OF OCEAN UNIVERSITY OF CHINA
ISSN	1672-5182
EISSN	1993-5021
出版年	2024
卷号	23 期号:4 页码:991-1002
英文摘要	Different from rivers in humid areas, the variability of riverine CO2 system in arid areas is heavily impacted by anthropogenic disturbance with the increasing urbanization and water withdrawals. In this study, the water chemistry and the controls of carbonate system in an urbanized river (the Fenhe River) on the semi-arid Loess Plateau were analyzed. The water chemistry of the river water showed that the high dissolved inorganic carbon (DIC) concentration (about 37 mg L-1) in the upstream with a karst land type was mainly sourced from carbonate weathering involved by H2CO3 and H2SO4, resulting in an oversaturated partial pressure of CO2 (pCO(2)) (about 800 mu atm). In comparison, damming resulted in the widespread appearance of non-free flowing river segments, and aquatic photosynthesis dominated the DIC and pCO(2) spatiality demonstrated by the enriched stable isotope of DIC (delta C-13(DIC)). Especially in the mid-downstream flowing through major cities in warm and low-runoff August, some river segments even acted as an atmospheric CO2 sink. The noteworthy is wastewater input leading to a sudden increase in DIC (> 55 mg L-1) and pCO(2) (> 4500 mu atm) in the downstream of Taiyuan City, and in cold November the increased DIC even extended to the outlet of the river. Our results highlight the effects of aquatic production induced by damming and urban sewage input on riverine CO2 system in semi-arid areas, and reducing sewage discharge may mitigate CO2 emission from the rivers.
英文关键词	dissolved inorganic carbon stable carbon isotope carbonate weathering aquatic photosynthesis sewage input the Fenhe River
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001261478100014
WOS关键词	DISSOLVED INORGANIC CARBON ; ISOTOPIC COMPOSITION ; PARTIAL-PRESSURE ; CO2 EMISSIONS ; YELLOW-RIVER ; URBAN RIVER ; FLUXES ; HUANGHE ; BASIN ; GEOCHEMISTRY
WOS类目	Oceanography
WOS研究方向	Oceanography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404652
推荐引用方式 GB/T 7714	Li, Yunxiao,Dang, Jiajia,Huang, Xiao,et al. The Response of Carbonate System to Watershed Urbanization Process in a Semi-Arid River[J],2024,23(4):991-1002.
APA	Li, Yunxiao.,Dang, Jiajia.,Huang, Xiao.,Yang, Hong.,Wang, Xiao.,...&Chen, Xi.(2024).The Response of Carbonate System to Watershed Urbanization Process in a Semi-Arid River.JOURNAL OF OCEAN UNIVERSITY OF CHINA,23(4),991-1002.
MLA	Li, Yunxiao,et al."The Response of Carbonate System to Watershed Urbanization Process in a Semi-Arid River".JOURNAL OF OCEAN UNIVERSITY OF CHINA 23.4(2024):991-1002.