| 长江潮区界上界河槽浅层沉积结构探测研究 |
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| 引用本文： | 张家豪,周丰年,程和琴,郑树伟,吴帅虎,石盛玉,徐韦.长江潮区界上界河槽浅层沉积结构探测研究[J].海洋测绘,2017(4):76-78. |
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| 作者姓名： | 张家豪 周丰年 程和琴 郑树伟 吴帅虎 石盛玉 徐韦 |
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| 作者单位： | ;1.华东师范大学河口海岸学国家重点实验室;2.长江水利委员会长江口水文水资源勘测局 |
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| 基金项目： | 国家自然科学基金(41476075)；中国地质调查局地质调查子项目(DD20160246) |
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| 摘 要： | 研究地层沉积结构是认识河流变迁历史的重要手段之一,潮区界作为河流物质和能量传输的关键界面之一,于2015年洪季,利用浅地层剖面仪对长江潮区界上界河段河槽浅地层结构进行了"覆盖式"探测。结果表明:长江潮区界上界河段河槽床面发育了大量沙波,尺度较大,陡坡明显朝向下游;崇文洲下游两侧水道中沙波发育较少,尺度也较小;浅层沉积结构显示该河段部分河槽床面以下存在4处不同形态的地质构造。
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| 关 键 词： | 沉积结构 浅地层剖面仪 潮区界 沙波 长江 |
Sub-bottom Sedimentary Structures Research and Detection at the Upper of Tidal Limit in the Chang Jiang River |
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| ZHANG Jiahao,ZHOU Fengnian,CHENG Heqin,ZHENG Shuwei,WU Shuaihu,SHI Shengyu,XU Wei.Sub-bottom Sedimentary Structures Research and Detection at the Upper of Tidal Limit in the Chang Jiang River[J].Hydrographic Surveying and Charting,2017(4):76-78. |
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| Authors: | ZHANG Jiahao ZHOU Fengnian CHENG Heqin ZHENG Shuwei WU Shuaihu SHI Shengyu XU Wei |
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| Institution: | State Key Laboratory of Estuarine and Coastal Research,East China Normal University,Shanghai 200062 ,China;The Survey Bureau of Hydrology and Water Resources of Chang Jiang Estuary,Chang Jiang Water Resources Commission,Shanghai 200136 ,China |
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| Abstract: | Sedimentary structure is one of the important methods on the understanding of the migration of river.However,as the momentous interface of the material and energy transportation,there has never been a report of the sub-bottom sedimentary structure research at the upper of the tidal limit in the Chang Jiang River."Full coverage" detection by a sub-bottom profiler is made at the upper of the tidal limit in the Chang Jiang River from July 2015 to August.The results show that a lot of symmetry-to-downstream dunes develop at the upper of the tidal limit in the Chang Jiang River (Chongwenzhou tail).In contrast,dunes develop on both sides of the downstream waterway of the Chongwenzhou tail with a smaller scale in the height and spacing.The sub-bottom sedimentary structure shows that there are layers developed in part of the Guichi waterway under the riverbed. |
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