On the flow behaviour of unconfined dual porosity aquifers with sloping base

IF 4 2区环境科学与生态学 Q1 WATER RESOURCES

Advances in Water Resources Pub Date : 2025-01-01 DOI:10.1016/j.advwatres.2024.104856

Konstantinos N. Moutsopoulos , John N.E. Papaspyros , Antonis D. Koussis , Frederick Delay , Marwan Fahs

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Abstract

The flow in an unconfined double-porosity aquifer with a sloping base is investigated and equations are developed for its description. In order to obtain a relatively simple description of the problem, similar assumptions as in Moutsopoulos (2021) have been adopted; the pressure in the unsaturated zone, especially in the fractures’ network, is considered to be atmospheric, and the Dupuit-Forchheimer approximation is invoked, reducing the dimensionality by eliminating the vertical direction. The derived equations have been linearized and solved analytically for a problem involving interaction between an inclined aquifer and an adjacent surface water body similar to the one examined by Akylas and Koussis (2007). The analytical solution has been checked against results obtained with state-of-the-art numerical codes. The agreement between the two approaches is excellent. The solution tools were used to gain insight in the influence of the aquifer's base inclination on the flow quantities.

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斜基底无约束双孔隙含水层渗流特性研究

研究了具有倾斜基底的无侧限双孔隙含水层的渗流问题，并建立了描述渗流的方程。为了获得对问题的相对简单的描述，采用了与Moutsopoulos（2021）相似的假设；非饱和带的压力，特别是裂缝网络中的压力，被认为是大气压力，并调用Dupuit-Forchheimer近似，通过消除垂直方向来降低维数。对于一个涉及倾斜含水层与相邻地表水体之间相互作用的问题，推导出的方程已被线性化并解析求解，该问题与Akylas和Koussis（2007）所研究的问题类似。解析解已与最先进的数值代码得到的结果进行了核对。这两种方法的一致性非常好。该解决工具用于深入了解含水层基底倾角对流量的影响。

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来源期刊

Advances in Water Resources 环境科学-水资源

CiteScore

9.40

自引率

6.40%

发文量

171

审稿时长

36 days

期刊介绍： Advances in Water Resources provides a forum for the presentation of fundamental scientific advances in the understanding of water resources systems. The scope of Advances in Water Resources includes any combination of theoretical, computational, and experimental approaches used to advance fundamental understanding of surface or subsurface water resources systems or the interaction of these systems with the atmosphere, geosphere, biosphere, and human societies. Manuscripts involving case studies that do not attempt to reach broader conclusions, research on engineering design, applied hydraulics, or water quality and treatment, as well as applications of existing knowledge that do not advance fundamental understanding of hydrological processes, are not appropriate for Advances in Water Resources. Examples of appropriate topical areas that will be considered include the following: • Surface and subsurface hydrology • Hydrometeorology • Environmental fluid dynamics • Ecohydrology and ecohydrodynamics • Multiphase transport phenomena in porous media • Fluid flow and species transport and reaction processes