Finite analytic method based on mixed-form Richards’ equation for simulating water flow in vadose zone
Zaiyong Zhang,Wenke Wang,Tian Chyi Jim Yeh,Li Chen,Zhoufeng Wang,Lei Duan,Kedong An,Chengcheng Gong +7 more
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TL;DR: In this article, a finite analytic method (FAMM) is proposed to solve the mixed-form Richards' equation, which combines flexibility of numerical methods and advantages of analytical solutions.
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About: This article is published in Journal of Hydrology. The article was published on 01 Jun 2016. and is currently open access. The article focuses on the topics: Richards equation & Finite difference method.
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Citations
Response of the groundwater system in the Guanzhong Basin (central China) to climate change and human activities
Wenke Wang,Zaiyong Zhang,Lei Duan,Zhoufeng Wang,Yaqian Zhao,Qian Zhang,Meiling Dai,Huizhong Liu,Xiaoyan Zheng,Yibo Sun +9 more
TL;DR: In this paper, an integrated approach was used to assess the impact of climate change and human activities on the groundwater system and the base flow of the Guanzhong Basin in central China, and the results indicated a clear warming trend and a decreasing trend in rainfall since the 1960s, in addition to increased human activities since the 1970s.
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Numerical solution of the Kirchhoff-transformed Richards equation for simulating variably saturated flow in heterogeneous layered porous media
Heejun Suk,Eungyu Park +1 more
TL;DR: In this article, a truncated Taylor series expansion was applied to the Kirchhoff head at the material interface to avoid the dyadic characteristics at the interface between different soil types, which could be used to simulate complicated heterogeneous flow at a large-scale watershed or regional scale.
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Application of an improved P(m)-SOR iteration method for flow in partially saturated soils
TL;DR: In this paper, the potential of using the successive over-relaxation iteration method with polynomial preconditioner (P(m)-SOR) to solve variably saturated flow problems described by the linearized Richards' equation was studied.
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Flow dynamics in vadose zones with and without vegetation in an arid region
Wenke Wang,Wenke Wang,Zaiyong Zhang,Zaiyong Zhang,Zaiyong Zhang,Tian Chyi Jim Yeh,Tian Chyi Jim Yeh,Gang Qiao,Wenmin Wang,Lei Duan,Lei Duan,Shao-Yang Huang,Jet-Chau Wen +12 more
TL;DR: In this paper, the authors investigated flow dynamics in a thick vadose zone in an arid region, China using a field experiment at plots with bare soils and vegetated soils, and found that vegetation affected flow dynamics even at 3m below land surface during its growth seasons.
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Approximate solution of a one-dimensional soil water infiltration equation based on the Brooks-Corey model
TL;DR: In this article, the authors used second-, third-and fourth-order Taylor series expansions to obtain an approximate analytical solution for a one-dimensional, constant water head, vertical infiltration equation.
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