Citation: | ZHU Chaoqi, SHAN Hongxian, LIU Xiaolei, SHENG Liancheng, XING Congcong, WANG Zhenhao, JIA Yonggang. The superposed sawtooth model of suspended sediment concentration in the Yellow River subaqueous delta based on in-situ observation[J]. Marine Geology & Quaternary Geology, 2018, 38(1): 195-201. doi: 10.16562/j.cnki.0256-1492.2018.01.020 |
The time series of waves, tides, currents, temperatures and turbidities were measured for 134 days in the Yellow River subaqueous delta with a submarine in situ tripod equipped by various instruments. The samples taken from the study site are analyzed in the laboratory for sediment grain size and the relationship between the suspended sediment concentration and turbidity. The sediment studied is mainly composed of silt, and a good linear relationship between the suspended sediment concentration and turbidity has observed. The suspended sediment concentration varies from 2 g/L to 4 g/L in the Yellow River subaqueous delta. Both the in-situ observation and the shear stress calculation show that the sharp rise in suspended sediment concentration is attributed to the episodic high waves, and the quotidian currents are responsible for the periodic fluctuation in suspended sediment concentration. Above all, a superposed sawtooth model of suspended sediment concentration influenced by waves and currents is proposed and the shear stress can explain the reason why episodic waves account for large sawteeth and currents are responsible for the small sawteeth.
[1] | Yang S L, Zhang J, Zhu J. Response of suspended sediment concentration to tidal dynamics at a site inside the mouth of an inlet: Jiaozhou Bay (China)[J]. Hydrology and Earth System Sciences, 2004, 8(2): 170-182. doi: 10.5194/hess-8-170-2004 |
[2] | 乔璐璐, 史经昊, 高飞, 等.我国陆架泥质区沉积动力数值模拟研究进展[J].海洋地质与第四纪地质, 2014, 34(3): 155-166. QIAO Lulu, SHI Jinghao, GAO Fei, et al. Numerical simulation of sediment dynamic processes for mud areas on the east china sea continental shelves: A review[J]. Marine Geology & Quaternary Geology, 2014, 34(3): 155-166. |
[3] | 毕世普, 胡刚, 何拥军, 等.近20年来长江口表层悬沙分布的遥感监测[J].海洋地质与第四纪地质, 2011, 31(5): 17-24. BI Shipu, HU Gang, HE Yongjun, et al. Remote sensing monitoring of surface suspended sediments at Yangtze estuary in the past two decades[J]. Marine Geology & Quaternary Geology, 2011, 31(5): 17-24. |
[4] | 李建超, 乔璐璐, 李广雪, 等.基于LISST数据的冬季南黄海悬浮体分布[J].海洋地质与第四纪地质, 2013, 33(5): 13-25. LI Jianchao, QIAO Lulu, LI Guangxue, et al. Distribution of winter suspended particulate matters in the south yellow sea based on LISST data[J]. Marine Geology & Quaternary Geology, 2013, 33(5): 13-25. |
[5] | 邵和宾, 范德江, 麦晓磊, 等.长江口典型断面悬浮体颗粒类型与粒级构成及其影响因素[J].海洋地质与第四纪地质, 2013, 33(3): 47-56. SHAO Hebin, FAN Dejiang, MAI Xiaolei, et al. Types and size of suspended particles in a typical cross section at the Changjiang estuary and influence factors[J]. Marine Geology & Quaternary Geology, 2013, 33(3): 47-56. |
[6] | 肖合辉, 王厚杰, 毕乃双, 等.渤黄海海域悬浮体季节性分布及主要运移路径[J].海洋地质与第四纪地质, 2015, 35(2): 11-21. XIAO Hehui, WANG Houjie, BI Naishuang, et al. Seasonal variation of suspended sediment in the Bohai and Yellow Sea and the pathway of sediment transport[J]. Marine Geology & Quaternary Geology, 2015, 35(2): 11-21. |
[7] | 余佳, 王厚杰, 毕乃双, 等.基于MODIS L1B数据的黄海悬浮体季节性分布的反演[J].海洋地质与第四纪地质, 2014, 34(1): 1-9. YU Jia, WANG Houjie, BI Naishuang, et al. Seasonal distribution and variation of suspended sediment in the Yellow Sea in 2010 based on retrieved monthly data from MODIS L1B imagery[J]. Marine Geology & Quaternary Geology, 2014, 34(1): 1-9. |
[8] | 李建如, 徐景平, 刘志飞.底基三脚架在深海观测中的应用[J].地球科学进展, 2013, 28(5): 559-565. LI Jianru, XU Jingping, LIU Zhifei. Applications of tripods to deep-sea observation[J]. Advance in Earth Science, 2013, 28(5): 559-565. |
[9] | 李博闻, 单红仙, 张少同, 等.波浪与潮流对潮滩悬沙含量贡献的现场观测[J].海洋地质与第四纪地质, 2016, 36(3): 183-190. LI Bowen, SHAN Hongxian, ZHANG Shaotong, et al. Contribution of waves and currents to sediment suspension revealed by in-situ observation[J]. Marine Geology & Quaternary Geology, 2016, 36(3): 183-190. |
[10] | Yang S L, Li P, Gao A, et al. Cyclical variability of suspended sediment concentration over a low-energy tidal flat in Jiaozhou Bay, China: effect of shoaling on wave impact[J]. Geo-Marine Letters, 2007, 27(5): 345-353. doi: 10.1007/s00367-007-0058-2 |
[11] | 马小川, 范奉鑫, 阎军.海洋沉积动力过程原位监测平台及其应用[J].海洋地质与第四纪地质, 2011, 31(4): 179-185. MA Xiaochuan, FAN Fengxin, YAN Jun. In-situ monitoring platform for marine sediment dynamics and its application[J]. Marine Geology & Quaternary Geology, 2011, 31(4): 179-185. |
[12] | Zhu C Q, Jia Y G, Liu X L, et al. Influence of waves and currents on sediment erosion and deposition based on in-situ observation: case study in Baisha Bay, China[J]. Journal of Marine Environmental Engineering, 2017, 10(1): 29-43. |
[13] | Zhu C Q, Jia Y G, Wang Z H, et al. Dynamics of bottom boundary layers in the yellow river subaqueous delta based on long-term in-situ observations[J]. Acta Geologica Sinica(English Edition), 2017, 91(1): 369-370. doi: 10.1111/1755-6724.13095 |
[14] | Liu X L, Zhu C Q, Zheng J W, et al. The observations of seabed sediment erosion and resuspension processes in the Jiaozhou Bay in China[J]. Acta Oceanologica Sinica, 2017, 36(11): 79-85. doi: 10.1007/s13131-016-1072-5 |
[15] | Jonsson I G. Wave boundary layers and friction factors[J]. Coastal Engineering Proceedings, 1966, 10: 127-148. |
[16] | Dufois F O, Garreau P, Le Hir P, et al. Wave-and current-induced bottom shear stress distribution in the Gulf of Lions[J]. Continental Shelf Research, 2008, 28(15): 1920-1934. doi: 10.1016/j.csr.2008.03.028 |
[17] | Hawley N. Sediment resuspension near the Keweenaw Peninsula, Lake Superior during the fall and winter 1990--1991[J]. Journal of Great Lakes Research, 2000, 26(4): 495-505. doi: 10.1016/S0380-1330(00)70711-8 |
[18] | Miller M C, Mccave I N, Komar P D. Threshold of sediment motion under unidirectional currents[J]. Sedimentology, 1977, 24(4): 507-527. doi: 10.1111/j.1365-3091.1977.tb00136.x |
[19] | 刘潇, 冯秀丽, 刘杰, 等.山东半岛靖海湾及其附近海域悬浮泥沙分布与变化[J].海洋地质与第四纪地质, 2012, 32(6): 9-15. LIU Xiao, FENG Xiuli, LIU Jie, et al. Spatial and temporal distribution pattern of suspended sediment in the Jinghai Bay and adjacent waters, Shandong Peninsula[J]. Marine Geology & Quaternary Geology, 2012, 32(6): 9-15. |
[20] | 杨华, 赵冲久, 侯志强, 等.粉沙质海岸波浪和潮流作用下泥沙垂线分布研究[J].水道港口, 2006, 27(3): 142-146. doi: 10.3969/j.issn.1005-8443.2006.03.002 YANG Hua, ZHAO Chongjiu, HOU Zhiqiang, et al. Study on sediment vertical distribution under the wave and current of silt coast[J]. Journal of Waterway and Harbour, 2006, 27(3): 142-146. doi: 10.3969/j.issn.1005-8443.2006.03.002 |
[21] | 左书华, 李九发, 万新宁, 等.长江河口悬沙浓度变化特征分析[J].泥沙研究, 2006(3): 68-75. doi: 10.3321/j.issn:0468-155X.2006.03.012 ZUO Shuhua, LI Jiufa, WAN Xinning, et al. Characteristics of temporal and spatial variation of suspended sediment concentration in the Changjiang Estuary[J]. Journal of Sediment Research, 2006(3): 68-75. doi: 10.3321/j.issn:0468-155X.2006.03.012 |
[22] | 于月倩, 许国辉, 赵庆鹏, 等.底床粉质土液化下波动水体含沙量垂向L型分布特征试验研究[J].海洋学报, 2010, 32(6): 144-151. YU Yueqian, XU Guohui, ZHAO Qingpeng, et al.An experiment study on L-shaped vertical characteristics of suspended sediment content on the liquefied silty soil bed[J]. Acta Oceanologica Sinica, 2010, 32(6): 144-151. |
Location of and water depth in the study site
Diagram and photo picture of submarine tripod
Submarine in situ tripod and layout
Triangular diagram for sediment classification
Relationship between SSC and turbidity
In-situ observation results of in the Yellow River Subaqueous Delta
The wave-induced shear stress and current-induced shear stress
The current velocity and suspended sediment concentration
The superposed sawtooth model of SSC