干旱区生态环境知识资源中心(Arid): Response of soil water movement and groundwater recharge to extreme precipitation in a headwater catchment in the North China Plain

Arid

DOI	10.1016/j.jhydrol.2019.06.071
	Response of soil water movement and groundwater recharge to extreme precipitation in a headwater catchment in the North China Plain
	Zheng, Wenbo 1; Wang, Shiqin 1; Sprenger, Matthias 2,3; Liu, Bingxia 1; Cao, Jiansheng 1
通讯作者	Wang, Shiqin
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2019
卷号	576 页码:466-477
英文摘要	Soil water storage and movement are highly heterogeneous across landscapes and their response to spatio-temporal variations in meteorological forcing is complex. While different pools of soil water (including bound and mobile water) are observed, the mechanisms of soil water movement in semi-arid and sub-humid regions are not well understood due to high variation in soil water storage conditions. The Taihang Mountain is a headwater region that recharges both groundwater and surface water systems of the North China Plain, where groundwater levels have been declining and water storage loss is serious. Increasing land cultivation in the Taihang Mountain areas has increased evapotranspiration and reduced both surface runoff and groundwater recharge. Although extreme precipitation is critical for groundwater recharge in the headwater regions, the response mechanism of soil water movement and groundwater recharge remains unclear. In this study, soil water movement and groundwater recharge mechanisms in a cultivated farmland (FL) and land under natural vegetation (NV) were determined for a normal and an extreme precipitation year through the combined use of soil water content and stable isotopes of water (O-18 and H-2). Soil water got enriched in delta O-18 and delta H-2 (delta O-18 changed from -11.2 to -7.0 parts per thousand at NV and from -11.1 to -4.4 parts per thousand at FL; delta H-2 changed from -71 to -49 parts per thousand at NV and from -73 to - 30% at FL) with increasing soil depth during the growing season suggesting that winter precipitation was generally transported via advection dispersion flow mechanism. However, this process was accompanied by the mixing of previously enriched soil water after large rain events (20-50 mm/day) during the rainy season in a normal precipitation year. Water movement changed from translatory flow to preferential flow after extreme precipitation in a wet precipitation year. Cultivation intensified water evaporation in the top soil layer (upper 10-20 cm), and induced preferential flow down to 50 cm soil depth under FL relative to land under NV. Thus, cropping significantly reduced groundwater recharge. Excessive storm during a wet year produced bypass flow after the first rainstorm, which rapidly recharged deep soil layers (50-100 cm depth). Bypass flow induced by excessive precipitation and contributed the most to groundwater in FL. The observed rapid response of soil water and groundwater to extreme precipitation events is critical for soil and water management to mitigate problems such as nitrate leaching and groundwater contamination in headwater regions of semi-arid and sub-humid areas.
英文关键词	Excessive rainstorm Stable isotopes Soil water movement Groundwater recharge Soil hydrology North China Plain
类型	Article
语种	英语
国家	Peoples R China ; Spain ; USA
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000486092200035
WOS关键词	PREFERENTIAL FLOW ; TAIHANG MOUNTAIN ; STABLE-ISOTOPES ; 2 SITES ; CLIMATE ; DELTA-O-18 ; HYDROLOGY ; FLUXES ; REGION ; EXPLOITATION
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217178
作者单位	1.Chinese Acad Sci, Inst Genet & Dev Biol, Ctr Agr Resources Res Inst, Key Lab Agr Water Resources, Shijiazhuang 050021, Hebei, Peoples R China; 2.CSIC, Inst Environm Assessment & Water Res IDAEA, Barcelona, Spain; 3.North Carolina State Univ, Dept Forestry & Environm Resources, Raleigh, NC 27606 USA
推荐引用方式 GB/T 7714	Zheng, Wenbo,Wang, Shiqin,Sprenger, Matthias,et al. Response of soil water movement and groundwater recharge to extreme precipitation in a headwater catchment in the North China Plain[J],2019,576:466-477.
APA	Zheng, Wenbo,Wang, Shiqin,Sprenger, Matthias,Liu, Bingxia,&Cao, Jiansheng.(2019).Response of soil water movement and groundwater recharge to extreme precipitation in a headwater catchment in the North China Plain.JOURNAL OF HYDROLOGY,576,466-477.
MLA	Zheng, Wenbo,et al."Response of soil water movement and groundwater recharge to extreme precipitation in a headwater catchment in the North China Plain".JOURNAL OF HYDROLOGY 576(2019):466-477.