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An Approximate Model for Predicting the Specific Yield Under Periodic Water Table Oscillations
Pozdniakov, Sergey P.1; Wang, Ping2; Lekhov, Vladimir A.1
2019-07-01
Source PublicationWATER RESOURCES RESEARCH
ISSN0043-1397
Volume55Issue:7Pages:6185-6197
Corresponding AuthorWang, Ping(wangping@igsnrr.ac.cn)
AbstractPredicting specific yield for a given aquifer remains a great challenge due to its dynamic characteristics, especially under periodic (e.g., seasonal and diurnal) groundwater level fluctuations. In this study, a dimensionless period of groundwater level fluctuations, which depends on the saturated hydraulic conductivity, the length of the groundwater level fluctuation period, and the soil water retention properties, is first introduced. Then, the relationship between the predicted specific yield and the dimensionless period of groundwater level fluctuations is defined based on the theory of variably saturated flow. The proposed approximate formula is tested by series of simulations of variably saturated flow within homogeneous and isotropic porous media with the Hydrus-1D program. The results of numerical experiments demonstrate an invariant relationship between the predicted specific yield and the dimensionless period for a wide range of changes in the dimensionless period of groundwater level oscillations. Furthermore, the sensitivity analysis of the dependence of the predicted specific yield on the van Genuchten parameters indicates the applicability of estimating the specific yield via van Genuchten parameters, which can be predicted by the soil texture classes for a given length of the oscillation period and a known saturated hydraulic conductivity in the zone of groundwater level fluctuations. The proposed model can be used for predicting the dynamics of the specific yield under seasonal or diurnal groundwater level fluctuations.
DOI10.1029/2019WR025053
WOS KeywordHYDRAULIC CONDUCTIVITY ; EVAPOTRANSPIRATION ; EXPRESSIONS ; FLOW
Indexed BySCI
Language英语
Funding ProjectRussian Science Foundation[16-17-10187] ; National Natural Science Foundation of China[41671023] ; NSFC-RFBR Programme 2018-2019[41811530084] ; NSFC-RFBR Programme 2018-2019[18-55-53025GammaPhiEH_a] ; Special Exchange Program of the Chinese Academy of Sciences 2019-2020
Funding OrganizationRussian Science Foundation ; National Natural Science Foundation of China ; NSFC-RFBR Programme 2018-2019 ; Special Exchange Program of the Chinese Academy of Sciences 2019-2020
WOS Research AreaEnvironmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
WOS SubjectEnvironmental Sciences ; Limnology ; Water Resources
WOS IDWOS:000481444700057
PublisherAMER GEOPHYSICAL UNION
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Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/68884
Collection中国科学院地理科学与资源研究所
Corresponding AuthorWang, Ping
Affiliation1.Lomonosov Moscow State Univ, Dept Hydrogeol, Moscow, Russia
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Pozdniakov, Sergey P.,Wang, Ping,Lekhov, Vladimir A.. An Approximate Model for Predicting the Specific Yield Under Periodic Water Table Oscillations[J]. WATER RESOURCES RESEARCH,2019,55(7):6185-6197.
APA Pozdniakov, Sergey P.,Wang, Ping,&Lekhov, Vladimir A..(2019).An Approximate Model for Predicting the Specific Yield Under Periodic Water Table Oscillations.WATER RESOURCES RESEARCH,55(7),6185-6197.
MLA Pozdniakov, Sergey P.,et al."An Approximate Model for Predicting the Specific Yield Under Periodic Water Table Oscillations".WATER RESOURCES RESEARCH 55.7(2019):6185-6197.
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