气候变化领域集成服务门户(CCPortal): Spatial characteristics of hydrochemistry and stable isotopes in river and groundwater, and runoff components in the Shule River Basin, Northeastern of Tibet Plateau

CCPortal

DOI	10.1016/j.jenvman.2023.119512
	Spatial characteristics of hydrochemistry and stable isotopes in river and groundwater, and runoff components in the Shule River Basin, Northeastern of Tibet Plateau
	Xie, Cong; Liu, Hang; Li, Xingru; Zhao, Haichen; Dong, Xiying; Ma, Keke; Wang, Ninglian; Zhao, Liangju
发表日期	2024
ISSN	0301-4797
EISSN	1095-8630
卷号	349
英文摘要	Water resources play a crucial role in constraining the high-quality development of the arid, necessitating an in-depth investigation and understanding of hydrological processes, hydrochemical characteristics, and their influencing factors amidst climate change. This study meticulously examined and analyzed the hydrochemistry and stable isotope composition (delta O-18 and delta D) of river and groundwater within the Shule River Basin (SRB). Results showed that both river (mean: 8.01) and groundwater (mean: 7.92) had alkaline pH values, while average total dissolved solids were measured at 709.25 mg/L in river and 861.88 mg/L in groundwater, indicating predominance of fresh water sources. HCO3-, SO42-, Na+ and Ca2+ were the most abundant ions, influenced by evaporation-crystallization processes and rock weathering. The dominated hydrochemical facies in both river and groundwater were Ca-HCO3 type in the upper (UR) and the middle reaches (MR), while Ca-Mg-Cl type in the lower reaches (LR). The local meteoric water line (LMWL) was defined as delta D = 8.01 delta O-18 + 18.48 (R-2 = 0.98, n = 163; P < 0 0.001). The more negative delta O-18 and delta D values in river and groundwater were plotted nearby and lower right of the LMWL, implying that the important recharge source of those waters is from precipitation. The relationship between river delta O-18 and elevation showed an increase of 0.14 parts per thousand/100 m in the UR, but a negative correlation with a rate of -0.47 parts per thousand/100 m in the MR and LR. Precipitation, groundwater, baseflow and meltwater accounted for 62.5%, 19.8%, 11.9% and 5.8% of the UR river, respectively, during the observed period, according to the end-member mixing analysis. These runoff components displayed distinct seasonal variations, primarily driven by precipitation during the early and groundwater/baseflow during the rapid and end-stage ablation periods. The observed alterations in hydrological elements present both opportunities and challenges for water resource management across the SRB, and adaptive measures have been proposed based on our study. These findings provide valuable insights into efficient utilization of water resources from water chemistry and environmental isotopes.
关键词	Stable isotopes Major ions Hydrograph separation Shule river basin
英文关键词	CLIMATE-CHANGE; HEIHE RIVER; QILIAN MOUNTAINS; WATER SECURITY; ARID REGION; PRECIPITATION; EVOLUTION; RECHARGE; MECHANISMS; SULFATE
WOS研究方向	Environmental Sciences
WOS记录号	WOS:001110800800001
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283542
作者单位	Northwest University Xi'an; Northwest University Xi'an
推荐引用方式 GB/T 7714	Xie, Cong,Liu, Hang,Li, Xingru,et al. Spatial characteristics of hydrochemistry and stable isotopes in river and groundwater, and runoff components in the Shule River Basin, Northeastern of Tibet Plateau[J],2024,349.
APA	Xie, Cong.,Liu, Hang.,Li, Xingru.,Zhao, Haichen.,Dong, Xiying.,...&Zhao, Liangju.(2024).Spatial characteristics of hydrochemistry and stable isotopes in river and groundwater, and runoff components in the Shule River Basin, Northeastern of Tibet Plateau.JOURNAL OF ENVIRONMENTAL MANAGEMENT,349.
MLA	Xie, Cong,et al."Spatial characteristics of hydrochemistry and stable isotopes in river and groundwater, and runoff components in the Shule River Basin, Northeastern of Tibet Plateau".JOURNAL OF ENVIRONMENTAL MANAGEMENT 349(2024).