兴化湾海域泥沙特征及地形变化分析

发布时间：2018-02-28 09:14

本文关键词： 兴化湾泥沙特征含沙量水沙输移地形变化潮汐　出处：《长江科学院院报》2017年08期 　论文类型：期刊论文

【摘要】：为了查明兴化湾海域泥沙特征及地形变化,基于2013年7月份兴化湾海域水文泥沙测验资料,分析了研究区域的泥沙分布特性,并结合兴化湾深槽历年实测数据探讨了悬沙运移对其水下地形变化的影响。分析结果表明:测区含沙量较小,本次测验平均含沙量为0.062 kg/m~3,大潮的平均含沙量较大,小潮的平均含沙量较小;含沙量的涨、落潮变化明显,最大含沙量多出现在最大涨急时刻附近,最小含沙量多出现在最大落急时刻附近,表明测验海域泥沙受到的扰动较小;各测点涨潮输沙率占优势,但涨、落潮输沙率绝对值都很小;研究海域泥沙随潮流往复进出,总体上为涨潮流方向,即由东南向西北运移,这与江阴壁头附近的情况相吻合,即深槽宽度不断向两侧扩展,而海底水深稳中有冲,基本处于略有冲刷的平衡状态。
[Abstract]:In order to find out the sediment characteristics and topographic changes in the Xinghua Bay, based on the hydrological sediment test data of Xinghua Bay in July 2013, the characteristics of sediment distribution in the study area are analyzed. The influence of suspended sediment migration on the change of underwater topography is discussed based on the measured data of Xinghua Bay deep trough over the years. The results show that the sediment content in the measured area is relatively small, the average sediment content in this test is 0.062 kg / m ~ (-1), and the average sediment content in the spring tide is larger. The average sediment content of the low tide is small, the change of the falling tide is obvious with the increase of the sediment content, the maximum sediment content appears near the maximum rising and sharp moment, the minimum sediment content appears near the maximum drop time, which indicates that the disturbance of sediment in the test sea area is small. The sediment transport rate of high tide is dominant, but the absolute value of sediment transport rate of rising tide and falling tide is very small. The sediment in and out of the study area is the direction of rising tide, that is, moving from southeast to northwest, which coincides with the situation near Jiangyin Wall head. That is, the width of deep trough expands to both sides continuously, and the seabed water depth is steady, which is basically in the balance state of slight scour.
【作者单位】：重庆水利电力职业技术学院水利工程系;
【基金】：重庆市基础与前沿研究计划项目(cstc2014jcyj A20009) 重庆市教委科研项目(KJ1403602)
【分类号】：TV148

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