气候变化领域集成服务门户(CCPortal): A Soil Moisture-Dependent Model to Simulate Water Table Depth and Proportions of Surface and Subsurface Runoff and Its Validation at the Basin Scale

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DOI	10.1029/2020JD033661
	A Soil Moisture-Dependent Model to Simulate Water Table Depth and Proportions of Surface and Subsurface Runoff and Its Validation at the Basin Scale
	Lv M.; Yang Z.-L.; Xu Z.; Dan L.; Lv M.; Zheng H.
发表日期	2021
ISSN	2169897X
卷号	126 期号:4
英文摘要	In land surface models, the ability to simulate runoff is a good diagnostic for the hydrological cycle and other surface parameterizations; however, the partitioning of total runoff into surface and subsurface runoff shows considerable uncertainties. The interaction between soil moisture and groundwater plays an important role in simulating the surface and subsurface runoff. Specific yield (Sy) is widely used to calculate water table depths, in which the error comes mainly from uncertainty in determining the Sy value. This study developed a new soil moisture-dependent model (SMD-model) to improve the simulations of water table depths and partitioning total runoff into subsurface and surface components. The validations against observations and the Community Noah Land Surface Model with MultiParameterization Options (Noah-MP) in three basins indicate that the SMD-model can simulate a realistic and stable water table series, which shows the detailed variations of observed water tables, avoiding the uncertainties in determining Sy; and it can generate accurate proportions of surface and subsurface runoff. However, when Sy is used to calculate the water table depth, keeping other processes the same as in the SMD-model, it produces a series of smoother and deeper water tables, and underestimates the proportion of subsurface runoff to total runoff by 24%–28%. Noah-MP captures the overall variation of observed water tables and overestimates the proportion of subsurface runoff by 20%–33%. This study can provide relatively accurate estimations of water tables and surface and subsurface runoff, and benefit the study of land-atmosphere interactions. © 2021. The Authors.
英文关键词	model development; runoff partitioning; water table depth
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185460
作者单位	CAS Key Laboratory of Regional Climate and Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Department of Geological Sciences, Jackson School of Geosciences, The University of Texas, Austin, TX, United States
推荐引用方式 GB/T 7714	Lv M.,Yang Z.-L.,Xu Z.,et al. A Soil Moisture-Dependent Model to Simulate Water Table Depth and Proportions of Surface and Subsurface Runoff and Its Validation at the Basin Scale[J],2021,126(4).
APA	Lv M.,Yang Z.-L.,Xu Z.,Dan L.,Lv M.,&Zheng H..(2021).A Soil Moisture-Dependent Model to Simulate Water Table Depth and Proportions of Surface and Subsurface Runoff and Its Validation at the Basin Scale.Journal of Geophysical Research: Atmospheres,126(4).
MLA	Lv M.,et al."A Soil Moisture-Dependent Model to Simulate Water Table Depth and Proportions of Surface and Subsurface Runoff and Its Validation at the Basin Scale".Journal of Geophysical Research: Atmospheres 126.4(2021).