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王希龙,宁桂珍,易曼,宾丽,念歆程,朱静敏.基于镭同位素示踪方法的大风江河口水体滞留时间估算[J].广西科学,2022,29(2):375-383. [点击复制]
- WANG Xilong,NING Guizhen,YI Man,BIN Li,NIAN Xincheng,ZHU Jingmin.Estimation of Water Residence Time in the Dafengjiang River Estuary Based on Radium Isotopes Tracing Model[J].Guangxi Sciences,2022,29(2):375-383. [点击复制]
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| 基于镭同位素示踪方法的大风江河口水体滞留时间估算 |
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王希龙1,2, 宁桂珍2, 易曼2, 宾丽2, 念歆程2, 朱静敏1,2
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| (1.北部湾大学, 广西北部湾海洋灾害研究重点实验室, 广西钦州 535011;2.北部湾大学海洋学院, 广西钦州 535011) |
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| 摘要: |
| 为评估广西北部湾沿岸的重要入海河流河口区——大风江河口的水体更新速率，本研究对大风江河口水体中的224Ra和223Ra放射性活度进行测定,基于短长半衰期镭同位素的活度比值，对大风江河口的水体滞留时间进行估算，得出大风江河口枯季的平均水体滞留时间为(8.36±2.88) d。整体来讲，大风江河口的水体更新速率相对较慢，在其遭受陆源污染时应在相应时间尺度上进行污染防控，以期为大风江河口水体的物质交换和输运提供基础信息。 |
| 关键词: 水体滞留时间 同位素示踪 镭同位素 大风江 污染防控 |
| DOI：10.13656/j.cnki.gxkx.20220526.019 |
| 投稿时间：2021-06-04 |
| 基金项目:国家自然科学基金项目(41906150),广西科技计划项目(桂科AD19245147)，广西自然科学基金项目(2018GXNSFBA281051)和北部湾大学科研启动项目(2018KYQD09)资助。 |
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| Estimation of Water Residence Time in the Dafengjiang River Estuary Based on Radium Isotopes Tracing Model |
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WANG Xilong1,2, NING Guizhen2, YI Man2, BIN Li2, NIAN Xincheng2, ZHU Jingmin1,2
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| (1.Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf, Beibu Gulf University, Qinzhou, Guangxi, 535011, China;2.College of Marine Sciences, Beibu Gulf University, Qinzhou, Guangxi, 535011, China) |
| Abstract: |
| In order to evaluate the water renewal rate of the Dafengjiang River estuary,an important estuary area of the Beibu Gulf coast in Guangxi,the radio-activities of 224Ra and 223Ra in the Dafengjiang River estuary water were determined in this study.Based on the activity ratio of short and long half-life radium isotopes,the water retention time of Dafengjiang River estuary was estimated,and the average water retention time in dry season was ( 8.36±2.88 ) d.On the whole,the renewal rate of water body in the Dafengjiang River estuary is relatively slow,pollution prevention and control should be carried out at the corresponding time scale when it is subjected to terrestrial pollution.It is expected that this study can provide basic information for the material exchange and transportation of the Dafengjiang River estuary. |
| Key words: water retention time isotopes tracing radium isotopes Dafengjiang River pollution prevention and control |
