Linking regional sources and pathways for submarine groundwater discharge at a reef by electrical resistivity tomography, 222Rn, and salinity measurements

被引：45

作者：

Cardenas, M. Bayani ^{[1
]}

Zamora, Peter B. ^{[2
]}

Siringan, Fernando P. ^{[2
]}

Lapus, Mark R. ^{[3
]}

Rodolfo, Raymond S. ^{[3
]}

Jacinto, Gil S. ^{[2
]}

Lourdes San Diego-McGlone, Maria ^{[2
]}

Villanoy, Cesar L. ^{[2
]}

Cabrera, Olivia ^{[2
]}

Isabel Senal, Maria ^{[2
]}

机构：

[1] Univ Texas Austin, Dept Geol Sci, Austin, TX 78712 USA

[2] Univ Philippines Diliman, Inst Marine Sci, Quezon City 1101, Philippines

[3] Univ Philippines Diliman, Natl Inst Geol Sci, Quezon City 1101, Philippines

来源：

GEOPHYSICAL RESEARCH LETTERS | 2010年 / 37卷

关键词：

COASTAL ZONE; CORAL-REEFS; WATER EXCHANGE; INPUTS; PHILIPPINES; JAMAICA; FLUXES; OCEAN; FACE; BAY;

D O I：

10.1029/2010GL044066

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Submarine groundwater discharge (SGD) is an important component of the hydrologic cycle connecting terrestrial to marine environments. SGD in fringing reefs and its consequences on biogeochemistry and ecology remain mostly unexplored. The Rn-222 activity and salinity of seawater indicate a substantial groundwater contribution throughout most of the 20 km(2) studied tropical reef in Pangasinan, Philippines. Over 30 km of electrical resistivity profiles with a penetration depth of 12.5 m shows widespread zones within the reef that are much more resistive than porous reef rocks or sediment saturated with typical seawater. Some discrete resistive areas are located close to where seawater has Rn-222 peaks and where geologic lineaments are likely located suggesting that these are preferential pathways for fresher groundwater discharging to the reef. SGD at the site could be a major ecological factor connecting the reef to the subsurface environment which in turn may lead to connections to land. Citation: Cardenas, M. B., P. B. Zamora, F. P. Siringan, M. R. Lapus, R. S. Rodolfo, G. S. Jacinto, M. L. San Diego-McGlone, C. L. Villanoy, O. Cabrera, and M. I. Senal (2010), Linking regional sources and pathways for submarine groundwater discharge at a reef by electrical resistivity tomography, Rn-222, and salinity measurements, Geophys. Res. Lett., 37, L16401, doi:10.1029/2010GL044066.

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