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。
Sedimentary structure is one of the important methods on the understanding o f 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.
出处
《海洋测绘》
CSCD
2017年第4期76-78,82,共4页
Hydrographic Surveying and Charting
基金
国家自然科学基金(41476075)
中国地质调查局地质调查子项目(DD20160246)
关键词
沉积结构
浅地层剖面仪
潮区界
沙波
长江
sedimentary structure
sub-bottom profiler
the tidal limit
sand waves
the Chang Jiang River