| 长江口河口河槽浅地层剖面探测研究 |
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| 引用本文： | 杨忠勇,程和琴,江红,张文祥,和玉芳,倪一卓.长江口河口河槽浅地层剖面探测研究[J].海洋测绘,2011,31(2):38-41. |
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| 作者姓名： | 杨忠勇 程和琴 江红 张文祥 和玉芳 倪一卓 |
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| 作者单位： | 华东师范大学河口海岸国家重点实验,上海,200062 |
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| 摘 要： | 于2010年枯季利用浅地层剖面仪等对长江口自江阴至北港、北槽和南槽口门段河槽浅部地层进行探测.探测结果显示:江阴至徐六泾段落潮流占绝对优势,床沙质以细砂为主,发育有波长约15～25m、波高约0.5～0.8m的沙波;自徐六泾至口门段河槽床面受势力相当的涨、落潮流影响,河槽床面仅偶尔发育有较小尺度的沙波,波长5.0～12m...
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| 关 键 词： | 长江口 河槽 沙波 浅部地层 浅地层剖面仪 |
Detection and Research by Sub-bottom Profiler in Changjiang Estuary |
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| YANG Zhong-yong,CHENG He-qin,JIANG Hong,ZHANG Wen-xiang,HE Yu-fang,NI Yi-zhuo.Detection and Research by Sub-bottom Profiler in Changjiang Estuary[J].Hydrographic Surveying and Charting,2011,31(2):38-41. |
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| Authors: | YANG Zhong-yong CHENG He-qin JIANG Hong ZHANG Wen-xiang HE Yu-fang NI Yi-zhuo |
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| Institution: | (State Key Laboratory of Estuarine and Coastal Research,East China Normal University,Shanghai,200062) |
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| Abstract: | Detection by sub-bottom profiler was made from Jiangyin to north channel,north passage and South Passage during the Changjiang estuary during the dry season of 2010.The results showed that majority of subaqueous dunes with a spacing of 15~25m and height of 0.5~0.8m on the riverbed with few stratification in the main channel from Jiangyin to Xuliujing where the ebb current was dominated.Less subaqueous dunes occurred with a spacing of 5.0~12m and height of 0.2~0.5m on the riverbed with some stratification of channels from Xuliujing to themouth area of north channel,north passage and south passage where flood and ebb current were alternating.Nevertheless,more subaqueous dunes were distributed in the North and South passage than those in north and south channel and south branch.There are two or more layers in the sub-bottom profiler in most areas,which is possibly responsible to complex scouring and silting in the riverbed,for the recent variation in dynamic environments and sediment source induced by large engineering projects located in the estuary and upstream catchment. |
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| Keywords: | Changjiang estuary riverbed subaqueous dunes stratification sub-bottom profiler |
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