气候变化领域集成服务门户(CCPortal): Development and Verification of a Three-Dimensional Variably Saturated Flow Model for Assessment of Future Global Water Resources

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DOI	10.1029/2020MS002093
	Development and Verification of a Three-Dimensional Variably Saturated Flow Model for Assessment of Future Global Water Resources
	Miura Y.; Yoshimura K.
发表日期	2020
ISSN	19422466
卷号	12 期号:8
英文摘要	Global water resource assessment has been conducted primarily for surface water and shallow groundwater (unconfined aquifers). Groundwater is a major water resource worldwide. Nevertheless, future water resource assessment integrating surface water and groundwater has not been carried out at the global scale. Large grid sizes are used in global-scale models due to computer resource constraints. Underground, the unsaturated zone that connects surface water and groundwater is expressed using a vertically one-dimensional grid of fixed size. However, the thickness of the unsaturated zone varies greatly between dry and humid areas, and future unsaturated zone conditions may differ from those at present due to climate change. In addition, for mountainous areas with steep slopes, representing the unsaturated zone in one vertical dimension is a major limitation. We believe that such a representation causes difficulty in adequately expressing underground water flow and thus introduces uncertainties into future prediction results. In this study, we developed a code to represent variably saturated flow with groundwater storativity in three dimensions based on physical equations, which can be used as references for parameterization in the future. To confirm the accuracy of this code, we verified it using vertical one- and two-dimensional infiltration problems, a three-dimensional groundwater pumping problem, hillslope problem, and water balance. The code achieved reliable results for each problem. © 2020. The Authors.
语种	英语
scopus关键词	Aquifers; Climate change; Flow of water; Hydrogeology; One dimensional; Surface waters; Global water resources; Resource assessments; Shallow groundwater; Surface water and groundwaters; Three-dimensional groundwater; Unconfined aquifers; Underground water flow; Variably saturated flow; Groundwater resources; climate change; flow modeling; groundwater; groundwater-surface water interaction; hillslope; infiltration; three-dimensional modeling; unconfined aquifer; vadose zone; water flow; water resource
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156670
作者单位	Department of Civil Engineering, School of Engineering, University of Tokyo, Tokyo, Japan; Institute of Industrial Science, University of Tokyo, Tokyo, Japan; Earth Observation Research Center, Japan Aerospace Exploration Agency, Ibaraki, Japan
推荐引用方式 GB/T 7714	Miura Y.,Yoshimura K.. Development and Verification of a Three-Dimensional Variably Saturated Flow Model for Assessment of Future Global Water Resources[J],2020,12(8).
APA	Miura Y.,&Yoshimura K..(2020).Development and Verification of a Three-Dimensional Variably Saturated Flow Model for Assessment of Future Global Water Resources.Journal of Advances in Modeling Earth Systems,12(8).
MLA	Miura Y.,et al."Development and Verification of a Three-Dimensional Variably Saturated Flow Model for Assessment of Future Global Water Resources".Journal of Advances in Modeling Earth Systems 12.8(2020).