刘晓磊,马路宽,张红,陆杨,陈安铎,张淑玉

• 1:中国海洋大学山东省海洋环境地质工程重点实验室
• 2:青岛海洋科学与技术试点国家实验室海洋地质过程与环境功能实验室

摘要(Abstract)：

海底浮泥层动态变化是研究海底沉积物输运及地形地貌演变的重要内容。针对浮泥层关键特征参数(悬浮泥沙浓度、上下界面),目前国际上主要采用声学和光学仪器进行观测,但不同仪器受限于观测原理,适用范围存在一定的局限性。通过潮滩试验,模拟浮泥层动态变化过程,对比不同仪器观测悬浮泥沙浓度和海床界面高程的效果。结果显示,在较低悬浮泥沙浓度(<10 g/L)情况下,高密度悬沙浓度剖面仪ASM、声学多普勒流速仪ADV与声学多普勒流速剖面仪ADP均能完成悬浮泥沙浓度的观测要求,声学蚀积仪AA400与ASM均能得到准确的海床高程。在悬沙浓度较高的情况下(>20 g/L),声波衰减显著,ADP相对于ASM的误差最高可达30.95%,难以准确测量水体悬沙浓度;随着悬沙浓度的升高(>30 g/L),AA400无法得到连续有效的海床界面位置,ASM也超出测量量程,因此,30 g/L的悬沙浓度可作为风暴过程中高浓度浮泥层形成的标志。在现场复杂海况下开展海底浮泥层动态变化研究需要多种仪器相互配合。

关键词(KeyWords)： 海底浮泥层;声学;光学;悬浮泥沙浓度;海床界面

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41877221);; 山东省自然科学基金项目(ZR2019QD001);; 青岛海洋科学与技术试点国家实验室开放基金项目(QNLM20160RP0110)资助~~

作者(Author): 刘晓磊,马路宽,张红,陆杨,陈安铎,张淑玉

DOI: 10.16441/j.cnki.hdxb.20200074

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