Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR028386 |
Analytical, experimental and numerical investigation of partially penetrating barriers for expanding island freshwater lenses | |
Min Yan; Chunhui Lu; Adrian D. Werner; Jian Luo | |
2021-02-12 | |
发表期刊 | Water Resources Research
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出版年 | 2021 |
英文摘要 | Freshwater lenses are of great importance in supporting both the vulnerable ecosystems of small‐to‐medium oceanic islands and the lives of local inhabitants. Recently, an engineering approach that embeds a low‐permeability, fully penetrating barrier along the shoreline was proposed and demonstrated under controlled conditions to be effective in enhancing island lens size. The current study extends that work by investigating the effect of partially penetrating barriers placed at the shoreline on both circular and strip island lenses, using: (1) sharp‐interface analytical solutions, (2) dispersive numerical modelling, and (3) sand tank experimentation. Analytical, experimental and numerical results are in reasonable agreement in terms of the freshwater‐seawater interface. The findings indicate that partially penetrating barriers of sufficient depth (i.e., the freshwater depth in barrier from the fully penetrating barrier case) produce comparable results to fully penetrating barriers, and therefore, the former is more cost‐effectiveness. Moreover, the minimum barrier depth (i.e., the “critical depth”) required to obtain approximately the same lens as that achieved using the fully penetrating barrier is estimable from the analytical solution, as verified by laboratory experiments and numerical simulations. The sensitivity analysis based on the analytical solution indicates that a lower barrier permeability and a greater barrier thickness, which lead to a higher freshwater storage (as expected), require a larger critical depth. The guidance on the design of partially penetrating shoreline barriers arising from this research adds to existing engineering techniques for enhancing freshwater resources on circular and strip islands. This article is protected by copyright. All rights reserved. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/313863 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Min Yan,Chunhui Lu,Adrian D. Werner,et al. Analytical, experimental and numerical investigation of partially penetrating barriers for expanding island freshwater lenses[J]. Water Resources Research,2021. |
APA | Min Yan,Chunhui Lu,Adrian D. Werner,&Jian Luo.(2021).Analytical, experimental and numerical investigation of partially penetrating barriers for expanding island freshwater lenses.Water Resources Research. |
MLA | Min Yan,et al."Analytical, experimental and numerical investigation of partially penetrating barriers for expanding island freshwater lenses".Water Resources Research (2021). |
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