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DOI	10.1016/j.jhydrol.2020.125882
	Suprapermafrost groundwater flow and exchange around a thermokarst lake on the Qinghai-Tibet Plateau, China
	Gao, Zeyong; Niu, Fujun; Wang, Yibo; Lin, Zhanju; Wang, Wei
通讯作者	Niu, FJ (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	0022-1694
EISSN	1879-2707
卷号	593
英文摘要	The dynamics of suprapermafrost groundwater regulate hydrological processes, including the fate and transport of carbon and nutrients, suitability of aquatic habitats, and evolution of permafrost in Arctic, boreal, and high-altitude regions. Nevertheless, relatively few studies have focused on these dynamics on the Qinghai-Tibet Plateau (QTP). In this study, soil hydraulic conductivities, saturated thicknesses, and related hydrological processes were observed in situ around a typical thermokarst lake during the warm season. The results showed that the water table in the active layer fluctuated markedly from June to October and at depths of up to 1.0 m. The discharge of suprapermafrost groundwater was often <0.1 m(2) d(-1), which was attributed to the thin aquifer and low permeability of the active layer. Groundwater fluxes were controlled by the freeze-thaw cycle and local factors, and were altered by rainfall events and evapotranspiration. The contributions of suprapermafrost groundwater to the thermokarst lake water were often <1.4 mm d(-1), and were greater in the late warm season. Moreover, surface runoff in initial warm season was the dominant water resource in some open parts of the lake, and the frequent exchange between surface runoff and lake water accelerated the degradation of the permafrost beneath the lake. These findings provide insights into the role of suprapermafrost groundwater in regional hydrological cycles and the evolution of thermokarst lakes on the Qinghai-Tibet Plateau.
英文关键词	Suprapermafrost groundwater; Thermokarst lake; Qinghai-Tibet Plateau; Water balance
语种	英语
WOS研究方向	Engineering ; Geology ; Water Resources
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000639853400066
来源期刊	JOURNAL OF HYDROLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254077
作者单位	[Gao, Zeyong; Niu, Fujun; Lin, Zhanju] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Wang, Yibo] Lanzhou Univ, Coll Earth & Environm Sci, Lanzhou 730000, Peoples R China; [Wang, Wei] Changan Univ, Key Lab Subsurface Hydrol & Ecol Effects Arid Reg, Minist Educ, Xian 710054, Peoples R China
推荐引用方式 GB/T 7714	Gao, Zeyong,Niu, Fujun,Wang, Yibo,et al. Suprapermafrost groundwater flow and exchange around a thermokarst lake on the Qinghai-Tibet Plateau, China[J]. 中国科学院西北生态环境资源研究院,2021,593.
APA	Gao, Zeyong,Niu, Fujun,Wang, Yibo,Lin, Zhanju,&Wang, Wei.(2021).Suprapermafrost groundwater flow and exchange around a thermokarst lake on the Qinghai-Tibet Plateau, China.JOURNAL OF HYDROLOGY,593.
MLA	Gao, Zeyong,et al."Suprapermafrost groundwater flow and exchange around a thermokarst lake on the Qinghai-Tibet Plateau, China".JOURNAL OF HYDROLOGY 593(2021).