Capillarity effect on groundwater dynamics during periodic forcing

IF 5.9 1区地球科学 Q1 ENGINEERING, CIVIL

Journal of Hydrology Pub Date : 2025-02-08 DOI:10.1016/j.jhydrol.2025.132827

Dawei Cheng , Hongbin Zhan , Xi Chen , Shengke Yang , Dongyong Sun , Xiuyu Liang

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引用次数: 0

Abstract

The capillarity effect, which refers to the movement of liquid in narrow spaces without the aid of external forces like gravity, plays a crucial role in water movement within soils and is often underrepresented in previous models. In cases where the capillary fringe is always below the soil surface, a new analytical model for saturated flow is developed, with the upper boundary located at the air-entry plane (

h_{a}

), to simulate groundwater dynamics under a single angular frequency harmonic forcing. This new analytical solution agrees well with previous experimental results and a specifically designed saturated–unsaturated flow finite element numerical model. The new model also addresses the assumptions regarding the upper boundary condition in previous models. The oscillatory behavior of the h_a plane are explored based on a simplified approximation of the new solution. The increase in hydraulic conductivity or time-averaged recharge rate will lead to an increase in phase lag and a decrease in amplitude decay. The increase of the initial h_a plane elevation, the average specific yield or the angular frequency of the harmonic forcing will lead to the decrease of the phase lag and the increase of the amplitude decay.

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来源期刊

Journal of Hydrology 地学-地球科学综合

CiteScore

11.00

自引率

12.50%

发文量

1309

审稿时长

7.5 months

期刊介绍： The Journal of Hydrology publishes original research papers and comprehensive reviews in all the subfields of the hydrological sciences including water based management and policy issues that impact on economics and society. These comprise, but are not limited to the physical, chemical, biogeochemical, stochastic and systems aspects of surface and groundwater hydrology, hydrometeorology and hydrogeology. Relevant topics incorporating the insights and methodologies of disciplines such as climatology, water resource systems, hydraulics, agrohydrology, geomorphology, soil science, instrumentation and remote sensing, civil and environmental engineering are included. Social science perspectives on hydrological problems such as resource and ecological economics, environmental sociology, psychology and behavioural science, management and policy analysis are also invited. Multi-and interdisciplinary analyses of hydrological problems are within scope. The science published in the Journal of Hydrology is relevant to catchment scales rather than exclusively to a local scale or site.