海洋测绘2011，Vol.31Issue(2)：38-41,4.
长江口河口河槽浅地层剖面探测研究
Detection and Research by Sub-bottom Profiler in Changjiang Estuary
摘要
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.关键词
长江口/河槽/沙波/浅部地层/浅地层剖面仪Key words
Changjiang estuary/ riverbed/ subaqueous dunes/ stratification/ sub-bottom profiler分类
海洋科学引用本文复制引用
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):38-41,4.基金项目
国家自然科学基金(40776056). （40776056）
