| 长江口水下高分辨率微地貌及运动特征 |
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| 引用本文： | 程和琴,李茂田,等.长江口水下高分辨率微地貌及运动特征[J].海洋工程,2002,20(2):91-95. |
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| 作者姓名： | 程和琴 李茂田 |
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| 作者单位： | 华东师范大学,河口海岸国家重点实验室,上海,200062 |
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| 基金项目： | 国家自然科学基金面上资助项目(49571007);上海市科委青年科技启明星计划资助项目(97QA1406);上海市教育发展基金曙光计划资助(99SG13) |
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| 摘 要： | 在 1997年枯季和 1998年全流域特大洪水后期 ,用旁侧声纳、热敏式双频测深仪、差分GPS、2 4道浅地层剖面仪、声学悬沙浓度剖面仪、流速仪等对长江口区主航槽进行走航测量和定点探测 ,第一次获得了长江口大量细颗粒大尺度底形沙波三维实测图像、数据以及底形运动的连续时间序列可视图像和数据。对这些图像和数据的分析结果对河口动力沉积和动力地貌过程、河口地形演变、大比例尺水下地形测量、三维流场的数值模拟、港口航道的疏浚以及深水航道的稳定性研究等具有重要意义。
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| 关 键 词： | 高分辨率微地貌 大尺度底形沙波 再悬浮 |
| 文章编号： | 1005-9865(2002)02-0091-05 |
| 修稿时间： | 2001年1月10日 |
High-resolution micro-topography movement in the Changjiang Estuary |
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| CHENG He qin,LI Mao tian,ZHOU Tian yu,XUE Yuan zhong.High-resolution micro-topography movement in the Changjiang Estuary[J].Ocean Engineering,2002,20(2):91-95. |
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| Authors: | CHENG He qin LI Mao tian ZHOU Tian yu XUE Yuan zhong |
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| Abstract: | A succession of high resolution large scale bed form movements with very fine sand are significant in survey records during the last period of 1998 disastrous flood and the dry season in 1997. They are detected by Thermal Depth Recorder, Sonar Side Scan, Endeco Current Meter placed along two profiles, and Optical Suspended Concentration Meter, Acoustic Suspended Concentration Profiler and D.GPS at one fixed station in the Changjiang Estuary. These instruments can provide the practical data about the tremendous quantities of bedload transport, which is mainly the ambiguous long standing problem causing serious shallowing in docks and navigation channels, and especially important for the present construction of Deep Water Channel in the Changjiang Estuary. |
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| Keywords: | high resolution micro topography large scale bedform resuspension |
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