| 长江口北槽泥沙运动现场示踪分析研究 |
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| 引用本文： | 戚定满,吴华林,万远扬,刘高峰,顾峰峰.长江口北槽泥沙运动现场示踪分析研究[J].海洋工程,2010,28(1). |
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| 作者姓名： | 戚定满 吴华林 万远扬 刘高峰 顾峰峰 |
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| 作者单位： | 上海河口海岸科学研究中心,上海,201201 |
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| 基金项目： | 上海市近海海洋综合调查与评价(908)专项PJ8和PJ9资助项目;;西部交通建设科技资助项目(20063280001300) |
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| 摘 要： | 研究利用铱(Ir)作为信号元素制备示踪沙,在长江口北槽深水航道维护困难区段开展示踪沙的现场投放及回收试验。利用火试金法对回收的泥沙样品进行痕量铱金属的提炼,并将其富集在微小铅珠中;再将铅珠压成薄片,并作为原子反应堆照射靶样进行中子活化分析,检测铱的含量。实验结果表明,在位于北槽深水航道北侧的3#坑投放示踪沙,北槽试验区所有泥沙样品中均检测出铱含量,其中位于深水航道南侧滩地上泥样中铱含量最高。因此,北侧3#贮泥坑流失的泥沙存在着跨越航道进入南侧边滩的情况,这对北槽中段航道回淤的影响较大,为改善北槽深水航道困难段的维护条件需要改进该处的抛吹泥工艺或限制抛泥活动。
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| 关 键 词： | 航道回淤 示踪沙运动 中子活化分析 信号元素 长江口深水航道 |
Application of tracer sediment in studying sediment movement at north passage of Yangtze estuary |
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| QI Ding-man,WU Hua-lin,WAN Yuan-yang,LIU Gao-feng,GU Feng-feng.Application of tracer sediment in studying sediment movement at north passage of Yangtze estuary[J].Ocean Engineering,2010,28(1). |
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| Authors: | QI Ding-man WU Hua-lin WAN Yuan-yang LIU Gao-feng GU Feng-feng |
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| Institution: | Shanghai Estuarine and Coastal Science Research Center;Shanghai 201201;China |
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| Abstract: | In the paper,Tracer sediment marked by the signal element of rare metal Iridium is used to study the back silting problem at the north passage deep channel of the Yangtze estuary.Fire assaying method is used to collect the signal element of Iridium in the sediment samples and enrichment of Iridium is made in the small lead ball.After the small lead ball is turned to the small slice,the element of Iridium can be activated to turn the radioactive Iridium-192 in the nuclear reactor,and the content of Iridium c... |
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| Keywords: | sediment back-silting tracer movement neutron activation analysis signal element north passage deepwater channel of the Yangtze estuary |
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