Recent advances in modeling of well hydraulics |
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Institution: | 1. Institute of Environmental Engineering, National Chiao Tung University, No. 1001, University Rd., East Dist., Hsinchu City 300, Taiwan;2. Graduate Institute of Hydrological and Oceanic Sciences, National Central University, No. 300, Jhongda Rd., Jhongli District, Taoyuan City 320, Taiwan |
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Abstract: | Well hydraulics is a discipline to understand the process of flow to the well in an aquifer which is regarded as a source of groundwater. A variety of analytical and numerical models have been developed over the last few decades to provide a framework for understanding and quantifying the flow behavior in aquifer systems. In this review, we first briefly introduce the background of the theory of well hydraulics and the concepts, methodologies, and applications of analytical, semi-analytical, numerical and approximate methods in solving the well-hydraulic problems. We then address the subjects of current interests such as the incorporation of effects of finite well radius, wellbore storage, well partial penetration, and the presence of skin into various practical problems of groundwater flow. Furthermore, we also summarize recent developments of flow modeling such as the flow in aquifers with horizontal wells or collector wells, the capture zone delineation, and the non-Darcian flow in porous media and fractured formations. Finally, we present a comprehensive review on the numerical calculations for five well functions frequently appearing in well-hydraulic literature and suggest some topics in groundwater flow for future research. |
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