Marine electrical imaging reveals novel freshwater transport mechanism in Hawai'i.
Marine electrical imaging reveals novel freshwater transport mechanism in Hawai'i.
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DOI：
10.1126/sciadv.abd4866
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发表时间：
2020-11
期刊：
影响因子：
13.6
通讯作者：
Constable S
中科院分区：
文献类型：
--
作者：
Attias E;Thomas D;Sherman D;Ismail K;Constable S
海洋电成像揭示了火山岛上新的陆上到近海海底淡水输送机制。传统的水文地质框架模型用于计算海洋岛屿可持续产量和含水层储存量，忽略了近岸和近海海底环境的复杂性。然而，夏威夷岛的陆上含水层在高海拔淡水补给和沿海排放之间表现出明显的体积差异。在这项研究中，我们提出了一种新的运输机制，淡水从陆上移动到海上通过多层形成的水饱和层状玄武岩与互层低渗透层的灰/土。海洋电磁成像显示，有135公里的横向连续电阻层，延伸到夏威夷海岸线以西至少4公里处，其中含有约3.5公里3的淡水。我们建议，这种新发现的运输机制的淡水可能是在其他火山岛的管理机制。在这种情况下，世界各地的火山岛可以利用这些可再生的近海水库作为新的水资源，这些水库被认为对气候变化导致的干旱更具适应力。
Marine electrical imaging reveals novel onshore-to-offshore submarine freshwater transport mechanism in volcanic islands. Conventional hydrogeologic framework models used to compute ocean island sustainable yields and aquifer storage neglect the complexity of the nearshore and offshore submarine environment. However, the onshore aquifer at the island of Hawai‘i exhibits a notable volumetric discrepancy between high-elevation freshwater recharge and coastal discharge. In this study, we present a novel transport mechanism of freshwater moving from onshore to offshore through a multilayer formation of water-saturated layered basalts with interbedded low-permeability layers of ash/soil. Marine electromagnetic imaging reveals ∼35 km of laterally continuous resistive layers that extend to at least 4 km from west of Hawai‘i’s coastline, containing about 3.5 km3 of freshened water. We propose that this newly found transport mechanism of fresh groundwater may be the governing mechanism in other volcanic islands. In such a scenario, volcanic islands worldwide can use these renewable offshore reservoirs, considered more resilient to climate change-driven droughts, as new water resources.
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影响因子：
3.3
作者：
Constable, Steven
通讯作者：
Constable, Steven
影响因子：
5.3
作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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DOI：
10.1007/s10967-015-4580-9
发表时间：
2016-03-01
影响因子：
1.6
作者：
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通讯作者：
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影响因子：
5.2
作者：
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