干旱区生态环境知识资源中心(Arid): Evaluation of the ecohydrological separation of different geomorphological units in a semi-arid area

Arid

DOI	10.1016/j.apgeochem.2023.105885
	Evaluation of the ecohydrological separation of different geomorphological units in a semi-arid area
	Zhang, Yu; Zhang, Mingjun; Qiang, Yuquan; Wang, Jiaxin; Guo, Rong; Qu, Deye; Wang, Shengjie
通讯作者	Zhang, MJ
来源期刊	APPLIED GEOCHEMISTRY
ISSN	0883-2927
EISSN	1872-9134
出版年	2024
卷号	161
英文摘要	The ecohydrological separation (ES) phenomenon which states that there are two incompletely mixing subsurface water pools, one of which is supplied to plants for transpiration while the other flows to groundwater and river water, has far-reaching implications for hydrological model simulation and water resources management. Specifically, it is unclear whether it occurs under different geomorphological units (hillside, foothill, and floodplain) within the same climate zone, as well as the reasons for such variations. We collected samples of precipitation, groundwater, river water, soil water, and plant stem water from April to October 2019 and analyzed their stable isotopic composition. Moreover, in order to further confirm whether the ES phenomenon exists in both hillside, foothill, and floodplain, we also calculated the line-conditioned excess and the isotope values of source water. The isotope values of plant stem water were similar to that of soil water rather than groundwater on the hillside. Groundwater on the foothill in April, June, July, and August had considerably different isotope values from plant stem water. The isotopic composition of plant stem water was comparable to that of groundwater in the floodplain, but there were differences in the isotope values of source water and lineconditioned excess. On the hillside, foothill, and floodplain, this study found evidence of the ES phenomenon. As a result of preferential flows through soils that cause soil-water heterogeneity, the ES phenomenon under various geomorphic units differs from one another. This research disproved theories about translational flow across the rooting zone and offered a new perspective on the ES phenomenon.
英文关键词	Ecohydrological separation Stable isotopes Line-conditioned excess Preferential flow Semi-arid area
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001151456400001
WOS关键词	RATIO INFRARED-SPECTROSCOPY ; WATER WORLDS HYPOTHESIS ; SOIL-WATER ; STABLE-ISOTOPE ; LOESS PLATEAU ; UNSATURATED ZONE ; PORE-WATER ; GROUNDWATER RECHARGE ; CRYOGENIC EXTRACTION ; PLANT
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/402862
推荐引用方式 GB/T 7714	Zhang, Yu,Zhang, Mingjun,Qiang, Yuquan,et al. Evaluation of the ecohydrological separation of different geomorphological units in a semi-arid area[J],2024,161.
APA	Zhang, Yu.,Zhang, Mingjun.,Qiang, Yuquan.,Wang, Jiaxin.,Guo, Rong.,...&Wang, Shengjie.(2024).Evaluation of the ecohydrological separation of different geomorphological units in a semi-arid area.APPLIED GEOCHEMISTRY,161.
MLA	Zhang, Yu,et al."Evaluation of the ecohydrological separation of different geomorphological units in a semi-arid area".APPLIED GEOCHEMISTRY 161(2024).