IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Temporal partitioning of water between plants and hillslope flow in a subtropical climate
Zhao, Pei1,2,4; Tang, Xiangyu2; Zhao, Peng3; Tang, Jialiang2
2018
Source PublicationCATENA
ISSN0341-8162
EISSN1872-6887
Volume165Pages:133-144
SubtypeArticle
AbstractRecent work has suggested that ecohydrological separation may exist between the water sources for recharge and plant water uptake. However, the temporal partitioning of plant transpiration and hillslope flow is still poorly understood. In a growing season, the stable isotopes of precipitation, soil water, groundwater, plant water and hillslope flow in a subtropical climate in Southwest China were determined to assess the compartmentalization of vegetation water use and flow generation. The results suggest that the hillslope flow and plant water have different isotopic characteristics in most cases. The lc-excess values of plants significantly differed from those of the hillslope flow. These different isotopic signatures for plants and the hillslope flow were associated with the different proportions of various water sources in each water pool. Precipitation, the hillslope flow and soil water plot approximately along the local meteoric water line (LMWL), and the studied plant xylem waters plot partly below the LMWL, supporting ecohydrological separation. In this subtropical climate with seasonal droughts, the hydrological separation is temporal and does not occur during the wet season due to the increase in hydrological connectivity. On dry days, the various water sources poorly mix in the subsurface. Thus, the ecohydrological separation between the plant water and hillslope flow water sources varies depending on the rooting depth of plant species and moisture conditions. The implications underlying these findings will be helpful for constructing a process-based ecohydrological model and for understanding the mechanisms underlying the hydrologic interactions between plants and subsurface water flow.
KeywordEcohydrological separation Mixing processes Plant water source Stable isotopes
DOI10.1016/j.catena.2018.01.031
Indexed BySCI
WOS KeywordSTABLE-ISOTOPE ANALYSIS ; SOIL-WATER ; LONG-TERM ; EXTRACTION ; GROUNDWATER ; PRECIPITATION ; FOREST ; SEPARATION ; VEGETATION ; STREAMFLOW
Language英语
Quartile2区
Funding ProjectNational Natural Science Foundation of China[41471188] ; National Natural Science Foundation of China[41371241] ; National Natural Science Foundation of China[41790431] ; Innovative Talents Promotion Plan in Shaanxi Province[2017KJXX-74] ; Key Research Program of Frontier Sciences[QYZDJ-SSW-DQC006] ; 135 Strategic Program of the Institute of Mountain Hazards and Environment, CAS[SDS-135-1702]
TOP
WOS Research AreaGeology ; Agriculture ; Water Resources
WOS SubjectGeosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS IDWOS:000430994900014
Funding OrganizationNational Natural Science Foundation of China ; Innovative Talents Promotion Plan in Shaanxi Province ; Key Research Program of Frontier Sciences ; 135 Strategic Program of the Institute of Mountain Hazards and Environment, CAS
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/21485
Collection山地表生过程与生态调控重点实验室
Corresponding AuthorTang, Xiangyu
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, Sichuan, Peoples R China
3.Sichuan Agr Univ, Coll Forestry, Chengdu 611130, Sichuan, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, 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
Corresponding 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. Temporal partitioning of water between plants and hillslope flow in a subtropical climate[J]. CATENA,2018,165:133-144.
APA Zhao, Pei,Tang, Xiangyu,Zhao, Peng,&Tang, Jialiang.(2018).Temporal partitioning of water between plants and hillslope flow in a subtropical climate.CATENA,165,133-144.
MLA Zhao, Pei,et al."Temporal partitioning of water between plants and hillslope flow in a subtropical climate".CATENA 165(2018):133-144.
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