| WANG Yaping,GAO Shu,KE Xiankun. 2004. Observations of boundary layer parameters and suspended sediment transport over the intertidal flats of northern Jiangsu, China. Acta Oceanologica Sinica, (3):437－448 |
| Observations of boundary layer parameters and suspended sediment transport over the intertidal flats of northern Jiangsu, China |
| Observations of boundary layer parameters and suspended sediment transport over the intertidal flats of northern Jiangsu, China |
| Received:March 11, 2004 Revised:May 20, 2004 |
| DOI： |
| Key words:boundary layer parameter grain size sediment transport intertidal flat Jiangsu coast |
| 中文关键词: boundary layer parameter grain size sediment transport intertidal flat Jiangsu coast |
| 基金项目: |
| Author Name | Affiliation | E-mail | | WANG Yaping | Laboratory for Coast and bland Development of the Ministry of Education, Nanjing University, Nanjing 210097, China | ypwang@nju.edu.cn | | GAO Shu | Laboratory for Coast and bland Development of the Ministry of Education, Nanjing University, Nanjing 210097, China | | | KE Xiankun | Laboratory for Coast and bland Development of the Ministry of Education, Nanjing University, Nanjing 210097, China
Department of Geography, University of Regina, Saskatchewan S4S OA2, Canada | |
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| Abstract: |
| A current-turbidity monitoring system(CTMS) was deployed on the intertidal flat at Wanggang,northern Jiangsu during October 16-17,2000,to measure the tidal current speeds and seawater turbidities at 5 levels above the seabed.Based upon the logarithmic-profile equation,the boundary layer parameters,i.e.,u*,z0 and C60,were obtained for 247 tidal flow velocity profiles.Around 90% of the profiles were logarithmic according to the critical correlation coefficient.Internal consistency analysis shows that these parameters derived by different methods are consistent with each other.In addition,the height of the bedforms observed is close to the seabed roughness lengths calculated from the velocity profiles,indicating that the boundary layer parameters obtained can reveal the conditions at the sediment-water interface on the intertidal flats.Suspended sediment concentrations were obtained from the 5 CTMS turbidity meters using laboratory and in-situ calibrations.The results show that the in-situ calibrations.The results show that the in-situ calibrated SSCs have a much higher accuracy than the laboratory calibrated ones.Calculation of suspended sediment fluxes on the intertidal flats,with a magnitude of 104 kg/m per spring tidal cycle,indicates that suspended sediment moves towards the northwest,which is reversal to the transport pattern controlled by the southward Northern Jiangsu Coastal Current in the sub-tidal zone and adjacent shallow waters. |
| 中文摘要: |
| A current-turbidity monitoring system(CTMS) was deployed on the intertidal flat at Wanggang,northern Jiangsu during October 16-17,2000,to measure the tidal current speeds and seawater turbidities at 5 levels above the seabed.Based upon the logarithmic-profile equation,the boundary layer parameters,i.e.,u*,z0 and C60,were obtained for 247 tidal flow velocity profiles.Around 90% of the profiles were logarithmic according to the critical correlation coefficient.Internal consistency analysis shows that these parameters derived by different methods are consistent with each other.In addition,the height of the bedforms observed is close to the seabed roughness lengths calculated from the velocity profiles,indicating that the boundary layer parameters obtained can reveal the conditions at the sediment-water interface on the intertidal flats.Suspended sediment concentrations were obtained from the 5 CTMS turbidity meters using laboratory and in-situ calibrations.The results show that the in-situ calibrations.The results show that the in-situ calibrated SSCs have a much higher accuracy than the laboratory calibrated ones.Calculation of suspended sediment fluxes on the intertidal flats,with a magnitude of 104 kg/m per spring tidal cycle,indicates that suspended sediment moves towards the northwest,which is reversal to the transport pattern controlled by the southward Northern Jiangsu Coastal Current in the sub-tidal zone and adjacent shallow waters. |
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