地下水通过盐沼潮汐溪流持续向上排放

IF 5.1 2区 地球科学 Q1 LIMNOLOGY Limnology and Oceanography Letters Pub Date : 2023-10-03 DOI:10.1002/lol2.10359
Lucheng Zhan, Pei Xin, Jiansheng Chen, Xiaogang Chen, Ling Li
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引用次数: 0

摘要

盐沼可以通过海底地下水排放(SGD)向海洋输出大量养分和碳。然而,人们对盐沼中复杂的地下水排放过程仍然知之甚少。在此,我们首次报道了在华东盐沼系统中发现的大量高盐度自流泉现象。我们结合了多种方法,包括时间序列热监测、同位素特征和高分辨率电阻率层析成像,来确定它们的起源和轨迹。有力的证据表明,这些泉水即使在涨潮时也在持续排放,代表了非承压含水层中被困的远古海水的长期再分布过程。这种新的泉源地下水流模式表明了一种隐蔽的 SGD 途径,对类似的多含水层-无水层沿岸系统的 SGD 通量研究具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Sustained upward groundwater discharge through salt marsh tidal creeks

Salt marshes can export considerable nutrients and carbon to the ocean through submarine groundwater discharge (SGD). However, the complicated SGD processes in salt marshes remain poorly understood. Here, we first report the phenomenon of numerous highly saline artesian springs found in a salt marsh system of East China. Multiple methods including time-series thermal monitoring, isotope signatures, and high-resolution electrical resistivity tomography were combined to determine their origin and trajectory. Strong evidence suggests that these springs keep discharging even during high tide and represent a long-term re-distribution process of the ancient marine water trapped in the unconfined aquifer. This new pattern of spring-derived groundwater flow indicates a hidden SGD pathway and has significant implications for studies concerning SGD-derived fluxes in similar multi-aquifer-aquitard coastal systems.

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来源期刊
CiteScore
10.00
自引率
3.80%
发文量
63
审稿时长
25 weeks
期刊介绍: Limnology and Oceanography Letters (LO-Letters) serves as a platform for communicating the latest innovative and trend-setting research in the aquatic sciences. Manuscripts submitted to LO-Letters are expected to present high-impact, cutting-edge results, discoveries, or conceptual developments across all areas of limnology and oceanography, including their integration. Selection criteria for manuscripts include their broad relevance to the field, strong empirical and conceptual foundations, succinct and elegant conclusions, and potential to advance knowledge in aquatic sciences.
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