IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Mixing of event and pre-event water in a shallow Entisol in sloping farmland based on isotopic and hydrometric measurements, SW China
Zhao, Pei1,2; Tang, Xiangyu2; Zhao, Peng3; Zhang, Wei2; Tang, Jialiang2
Corresponding AuthorXiangyu Tang
2016
Source PublicationHYDROLOGICAL PROCESSES
ISSN0885-6087
EISSN1099-1085
Volume30Issue:19Pages:3478-3493
SubtypeArticle
AbstractWater percolation and flow processes in subsurface geologic media play an important role in determining the water source for plants and the transport of contaminants or nutrients, which is essential for water resource management and the development of measures for pollution mitigation. During June 2013, the dynamics of the rainwater, soil water, subsurface flows and groundwater in a shallow Entisol on sloping farmland were monitored using a hydrometric and isotopic approach. The results showed that effective mixing of rainwater and soil water occurred in hours. The rebound phenomenon of D profiles in soils showed that most isotope-depleted rainwater largely bypassed the soil matrix when the water saturation in the soil was high. Preferential-flow, which was the dominant water movement pattern in the vadose zone, occurred through the whole soil profile, and infrequent piston-flow was mainly found at 20-40cm in depth. The interflow in the soil layer, composed of 75.2% rainwater, was only generated when the soil profile had been saturated. Underflow in the fractured mudrock was the dominant flow type in this hillslope, and outflow was dominated by base flow (groundwater flow) with a mean contribution of 76.7%. The generation mechanism of underflow was groundwater ridging, which was superimposed upon preferential-flow composed mainly of rainwater. The quick mixing process of rainwater and soil water and the rapid movement of the mixture through preferential channels in the study soil, which shows a typical bimodal pore size distribution, can explain the prompt release of pre-event water in subsurface flow. Water sources of subsurface flows at peak discharge could be affected by the antecedent soil water content, rain characteristics and antecedent groundwater levels. Copyright (c) 2016 John Wiley & Sons, Ltd.
KeywordStable Isotopes Preferential-flow Percolation Mechanism Vadose Zone Flow Generation
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1002/hyp.10867
WOS Subject ExtendedWater Resources
Indexed BySCI
WOS KeywordHYDROGRAPH SEPARATION ; RUNOFF GENERATION ; STABLE-ISOTOPES ; SOIL-WATER ; STORMFLOW GENERATION ; PREFERENTIAL FLOW ; SOLUTE TRANSPORT ; STREAM-FLOW ; CATCHMENT ; HILLSLOPE
Language英语
Quartile2区
TOP
WOS SubjectWater Resources
WOS IDWOS:000383569200010
Funding OrganizationMinistry of Science and Technology of China(2012CB417101) ; National Natural Science Foundation of China(41471188 ; Chinese Academy of Sciences ; Sichuan Province ; 41371241)
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18069
Collection山地表生过程与生态调控重点实验室
Affiliation1.Shangluo Univ, Coll Urban Rural Planning & Architectural Engn, Shangluo 726000, Peoples R China
2.Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
3.Sichuan Univ, Coll Water Resource & Hydropower, Chengdu 610065, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Zhao, Pei,Tang, Xiangyu,Zhao, Peng,et al. Mixing of event and pre-event water in a shallow Entisol in sloping farmland based on isotopic and hydrometric measurements, SW China[J]. HYDROLOGICAL PROCESSES,2016,30(19):3478-3493.
APA Zhao, Pei,Tang, Xiangyu,Zhao, Peng,Zhang, Wei,&Tang, Jialiang.(2016).Mixing of event and pre-event water in a shallow Entisol in sloping farmland based on isotopic and hydrometric measurements, SW China.HYDROLOGICAL PROCESSES,30(19),3478-3493.
MLA Zhao, Pei,et al."Mixing of event and pre-event water in a shallow Entisol in sloping farmland based on isotopic and hydrometric measurements, SW China".HYDROLOGICAL PROCESSES 30.19(2016):3478-3493.
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