Geochemical fluxes in sandy beach aquifers: Modulation due to major physical stressors, geologic heterogeneity, and nearshore morphology
Geochemical fluxes in sandy beach aquifers: Modulation due to major physical stressors, geologic heterogeneity, and nearshore morphology
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DOI：
10.1016/j.earscirev.2021.103800
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发表时间：
2021-10
影响因子：
12.1
通讯作者：
X. Geng;James W. Heiss;H. Michael;Hailong Li;B. Raubenheimer;M. Boufadel
中科院分区：
文献类型：
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作者：
X. Geng;James W. Heiss;H. Michael;Hailong Li;B. Raubenheimer;M. Boufadel
沿海海滩含水层是地球化学活跃的系统，介导海陆界面的化学和物质通量。本文综述了影响沿海海滩含水层水流和溶质归宿及运移的主要物理应力源和地质特征。我们概述了目前的理解，这些因素之间的相互作用及其对水和地球化学通量的相关影响内和跨这些含水层。控制海滩含水层中的流动、运输以及反应区的形成和分布的物理过程（例如，潮汐、波浪、密度梯度、降水、偶发海洋事件和蒸发）在重叠的时间和空间尺度上运作，并对沿海地下水系统中的物理流动和生物地球化学过程的测量和建模提出了挑战。地质异质性通过改变流动路径、混合模式和生物转化速率而引入了进一步的复杂性。这些物理压力源和地质控制因素之间的相互作用很可能随着海平面、气候多变性、人类住区、海岸侵蚀和其他自然和人为压力的变化而演变，从而为科学探索海滩含水层作为陆地和海洋之间化学介质的未来作用提供了途径。
Coastal beach aquifers are biogeochemically active systems that mediate chemical and material fluxes across the land-sea interface. This paper provides a review of major physical stressors and geologic features that influence flow and solute fate and transport in coastal beach aquifers. We outline current understanding of the interactions between these factors and their associated impacts on water and geochemical fluxes within and across these aquifers. The physical processes that control flow, transport, and the formation and distribution of reactive zones in beach aquifers (e.g., tides, waves, density gradients, precipitation, episodic ocean events, and evaporation) operate across overlapping temporal and spatial scales, and present challenges for measuring and modeling physical flow and biogeochemical processes in coastal groundwater systems. Geologic heterogeneity introduces further complexity by modifying flowpaths, mixing patterns, and rates of biotransformation. Interactions between these physical stressors and geological controls are likely to evolve with changes in sea level, climate variability, human settlement, coastal erosion, and other natural and anthropogenic stresses, providing avenues for scientific exploration into the future role of beach aquifers as chemical mediators between the land and ocean.