Submarine groundwater discharge around Taiwan

CHEN Chen-Tung Arthur; ZHANG Jing; PENG Tsung-Ren; KANDASAMY Selvaraj; WANG Deli; LIN Yi-Jie

doi:10.1007/s13131-018-1216-2

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Article Navigation > Acta Oceanologica Sinica > 2018 > 37(6): 18-22

CHEN Chen-Tung Arthur, ZHANG Jing, PENG Tsung-Ren, KANDASAMY Selvaraj, WANG Deli, LIN Yi-Jie. Submarine groundwater discharge around Taiwan[J]. Acta Oceanologica Sinica, 2018, 37(6): 18-22. doi: 10.1007/s13131-018-1216-2

Citation:

CHEN Chen-Tung Arthur, ZHANG Jing, PENG Tsung-Ren, KANDASAMY Selvaraj, WANG Deli, LIN Yi-Jie. Submarine groundwater discharge around Taiwan[J]. Acta Oceanologica Sinica, 2018, 37(6): 18-22. doi: 10.1007/s13131-018-1216-2

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Submarine groundwater discharge around Taiwan

doi: 10.1007/s13131-018-1216-2

1.
Department of Oceanography, National Sun Yat-sen University, Kaohsiung 804, Taiwan, China;State Key Laboratory of Satellite Ocean Environmental Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
2.
Environmental Biology and Chemistry, Graduate School of Science and Engineering, University of Toyama, 930-8555 Toyama, Japan
3.
Department of Soil and Environmental Sciences, National Chung Hsing University, Taichung 402, Taiwan, China
4.
State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China
5.
Department of Oceanography, National Sun Yat-sen University, Kaohsiung 804, Taiwan, China

Received Date: 2017-10-06
Rev Recd Date: 2018-03-20

Abstract

Abstract

A preliminary study shows that the submarine groundwater discharge (SGD) exists around Taiwan even though groundwater overdrawing on the island is serious. Fifteen of the 20 sites studied for major anions and cations recorded a clear SGD signal with freshwater outflow. A total of 278 salinity and major ion measurements were made. Sixteen nearly freshwater SGD (salinity ≤ 1.0) samples were obtained, providing strong and direct evidence for the existence of fresh meteoric groundwater entering the ocean from Taiwan. The total SGD flux is estimated to be 1.07×10¹⁰ t/a which is about 14% of the annual river output. The freshwater component of the SGD is 3.85×10⁹ t which is about 5.2% of the annual river discharge in Taiwan. The collected SGD has a composition similar to seawater with an addition of Ca, CO₃ and HCO₃ due to dissolution of calcareous rocks. Some samples with high Cl/(Na+K) may indicate pollution.
- submarine groundwater discharge,
- Taiwan,
- flux,
- major components,
- seawater intrusion

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References(24)

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