气候变化领域集成服务门户(CCPortal): Hydrological functioning of thawing soil water in a permafrost-influenced alpine meadow hillslope

CCPortal

DOI	10.1002/vzj2.20022
	Hydrological functioning of thawing soil water in a permafrost-influenced alpine meadow hillslope
	Xiao, Xiong; Zhang, Fan; Li, Xiaoyan; Wang, Guanxing; Zeng, Chen; Shi, Xiaonan
通讯作者	Zhang, F (通讯作者)
发表日期	2020
EISSN	1539-1663
卷号	19 期号:1
英文摘要	The complex variation of the hydrological functioning of soil water has been widely studied using measurements of the stable isotopic composition of either the bulk soil water (BSW) collected by the cryogenic vacuum extraction method or the mobile soil water (MSW) collected by the zero-tension soil lysimeter method. We collected samples of precipitation, BSW, MSW, and hillslope runoff in an alpine meadow hillslope influenced by permafrost to investigate the hydrological functioning of thawing soil water. The results showed that the delta H-2 values in BSW were generally more negative than those of the MSW, which may be a result of the depleted spring snowmelt that formed the tightly bound soil water. The relatively stable characteristics of delta H-2 in the MSW were related to the dynamic mixing of newly infiltrated precipitation with slightly enriched mobile water held by the low soil matrix potential. The delta H-2 values in the BSW showed higher temporal variations than the values in the MSW, which were mainly related to the mixing of depleted tightly bound soil water and enriched MSW in varying fractions. The MSW better represented the lateral subsurface flow (SSF, which further generated streamflow) than the BSW samples considering the relatively close stable isotopic values between the lateral SSF and the MSW in the same soil layer. The results of this study show the influences of the varying water level maintained by the underlying permafrost on the water and isotopic dynamics of both the soil water pools and streamflow.
关键词	QINGHAI-TIBET PLATEAU STABLE-ISOTOPES WORLDS HYPOTHESIS HEIHE RIVER EXTRACTION STREAMS CONNECTIVITY SYSTEMS RUNOFF SEPARATION
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Agriculture ; Water Resources
WOS类目	Environmental Sciences ; Soil Science ; Water Resources
WOS记录号	WOS:000618773300022
来源期刊	VADOSE ZONE JOURNAL
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/259858
推荐引用方式 GB/T 7714	Xiao, Xiong,Zhang, Fan,Li, Xiaoyan,et al. Hydrological functioning of thawing soil water in a permafrost-influenced alpine meadow hillslope[J]. 中国科学院青藏高原研究所,2020,19(1).
APA	Xiao, Xiong,Zhang, Fan,Li, Xiaoyan,Wang, Guanxing,Zeng, Chen,&Shi, Xiaonan.(2020).Hydrological functioning of thawing soil water in a permafrost-influenced alpine meadow hillslope.VADOSE ZONE JOURNAL,19(1).
MLA	Xiao, Xiong,et al."Hydrological functioning of thawing soil water in a permafrost-influenced alpine meadow hillslope".VADOSE ZONE JOURNAL 19.1(2020).