DOI: 10.5194/hess-23-2245-2019
论文题名: Modelling of shallow water table dynamics using conceptual and physically based integrated surface-water-groundwater hydrologic models
作者: Bizhanimanzar M. ; Leconte R. ; Nuth M.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2019
卷: 23, 期: 5 起始页码: 2245
结束页码: 2260
语种: 英语
Scopus关键词: Catchments
; Computational efficiency
; Groundwater flow
; Groundwater resources
; Infiltration
; Rain
; Soil moisture
; Surface waters
; Watersheds
; Calibration parameters
; Ground water recharge
; Hydrological modeling
; Hydrostatic equilibrium
; Integrated hydrological modelling
; Numerical experiments
; Soil moisture deficits
; Water table fluctuations
; Recharging (underground waters)
; accuracy assessment
; catchment
; comparative study
; groundwater-surface water interaction
; hydrological modeling
; recharge
; shallow water
; water table
英文摘要: We present a new conceptual scheme of the interaction between unsaturated and saturated zones of the MOBIDIC (MOdello Bilancio Idrologico DIstributo e Continuo) hydrological model which is applicable to shallow water table conditions. First, MODFLOW was coupled to MOBIDIC as the physically based alternative to the conceptual groundwater component of the MOBIDIC-MODFLOW. Then, assuming a hydrostatic equilibrium moisture profile in the unsaturated zone, a dynamic specific yield that is dependent on the water table level was added to MOBIDIC-MODFLOW, and calculation of the groundwater recharge in MOBIDIC was revisited using a power-type equation based on the infiltration rate, soil moisture deficit, and a calibration parameter linked to the initial water table depth, soil type, and rainfall intensity. Using the water table fluctuation (WTF) method for a homogeneous soil column, the parameter of the proposed groundwater recharge equation was determined for four soil types, i.e. sand, loamy sand, sandy loam, and loam under a pulse of rain with different intensities. The fidelity of the introduced modifications in MOBIDIC-MODFLOW was assessed by comparison of the simulated water tables against those of MIKE SHE, a physically based integrated hydrological modelling system simulating surface and groundwater flow, in two numerical experiments: a two-dimensional case of a hypothetical watershed in a vertical plane (constant slope) under a 1cmd-1 uniform rainfall rate and a quasi-real three-dimensional watershed under 1 month of a measured daily rainfall hyetograph. The comparative analysis confirmed that the simplified approach can mimic simple and complex groundwater systems with an acceptable level of accuracy. In addition, the computational efficiency of the proposed approach (MIKE SHE took 180 times longer to solve the three-dimensional case than the MOBIDIC-MODFLOW framework) demonstrates its applicability to real catchment case studies. © 2019 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162977
Appears in Collections: 气候变化与战略
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作者单位: Bizhanimanzar, M., Department of Civil Engineering, Université de Sherbrooke, Sherbrooke, J1K2R1, Canada; Leconte, R., Department of Civil Engineering, Université de Sherbrooke, Sherbrooke, J1K2R1, Canada; Nuth, M., Department of Civil Engineering, Université de Sherbrooke, Sherbrooke, J1K2R1, Canada
Recommended Citation:
Bizhanimanzar M.,Leconte R.,Nuth M.. Modelling of shallow water table dynamics using conceptual and physically based integrated surface-water-groundwater hydrologic models[J]. Hydrology and Earth System Sciences,2019-01-01,23(5)