| CHEN Chen-Tung Arthur,ZHANG Jing,PENG Tsung-Ren,KANDASAMY Selvaraj,WANG Deli,LIN Yi-Jie. 2018. Submarine groundwater discharge around Taiwan. Acta Oceanologica Sinica, 37(6):18－22 |
| Submarine groundwater discharge around Taiwan |
| 台湾周遭之地下水入海 |
| Received:October 06, 2017 Revised:March 20, 2018 |
| DOI：10.1007/s13131-018-1216-2 |
| Key words:submarine groundwater discharge Taiwan flux major components seawater intrusion |
| 中文关键词: 地下水入海 台湾 通量 主要组成 海水入侵 |
| 基金项目:The Aim for the Top University Program of the Ministry of Education under contract No. 06C030203; the Ministry of Science and Technology of Taiwan under contract No. MOST 105-2611-M-110-017. |
| Author Name | Affiliation | E-mail | | CHEN Chen-Tung Arthur | 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 | ctchen@mail.nsysu.edu.tw | | ZHANG Jing | Environmental Biology and Chemistry, Graduate School of Science and Engineering, University of Toyama, 930-8555 Toyama, Japan | | | PENG Tsung-Ren | Department of Soil and Environmental Sciences, National Chung Hsing University, Taichung 402, Taiwan, China | | | KANDASAMY Selvaraj | State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China | | | WANG Deli | State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China | | | LIN Yi-Jie | Department of Oceanography, National Sun Yat-sen University, Kaohsiung 804, Taiwan, China | |
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| 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. |
| 中文摘要: |
| 虽然台湾岛上已超抽地下水，但初步研究显示仍有地下水入海。20个用以研究主要阴、阳离子的地下水入海测站中，有15个有明显的淡水信号。总共测量了278个盐度及主要离子样品，而其中有16个几乎是淡水(盐度≦1)，明确证明有近年雨水形成的地下水入海。地下水入海总量为每年1.07×1010吨，相当于14%之河水输出量。而其中之纯水量为3.85×109 t，相当于台湾每年5.2%的河川流量。这些入海的地下水组成与海水相似，但由于石灰岩之溶解，而添加了Ca,CO3及HCO3。有些含高Cl/(Na+K)的样品，显示污染。 |
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