| MA Gangfeng,LIU Shuguang,QI Dingman.Study of back-silting strength in the north passage channel of Changjiang Estuary[J].Acta Oceanologica Sinica,2007,(2):56-64 |
| Study of back-silting strength in the north passage channel of Changjiang Estuary |
| Study of back-silting strength in the north passage channel of Changjiang Estuary |
| 投稿时间：2006-09-08 修订日期：2006-12-05 |
| DOI： |
| 中文关键词: empirical orthogonal function (EOF) Changjiang Estuary back-silting strength |
| 英文关键词:empirical orthogonal function (EOF) Changjiang Estuary back-silting strength |
| 基金项目: |
| 作者 | 单位 | E-mail | | MA Gangfeng | Harbor, Waterway and Coast Engineering, Tongji University, Shanghai 200092, China
Estuarine and Coastal Scientific Research Institute, Ministry of Communications, Shanghai 201201, China | gangfeng_ma@hotmail.com | | LIU Shuguang | Harbor, Waterway and Coast Engineering, Tongji University, Shanghai 200092, China | | | QI Dingman | Estuarine and Coastal Scientific Research Institute, Ministry of Communications, Shanghai 201201, China | |
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| 中文摘要: |
| Temporal and spatial variations of the back-silting strength in the north passage channel of Changjiang Estuary are investigated using the empirical orthogonal function (EOF) method, with the aim to determine the imposed processes and time-scales.Data on back-silting quantity in every dredging unit of the channel have been collected since March 2000, predominantly once 15 d.The EOF analysis of the back-silting strength reveals two significant modes, which totally explain 58.33% of the overall variance, and the corresponding processes and time-scales.The first EOF mode shows a clear annual cycle which is determined by the riverine water and sediment discharge from the upstream.The second EOF mode reveals a close relation between the back-silting strength and project activities.Because the processes are greatly interrelated in this study case, the other EOF modes accounting for 41.67% of the total variance do not show clear processes and time-scales. |
| 英文摘要: |
| Temporal and spatial variations of the back-silting strength in the north passage channel of Changjiang Estuary are investigated using the empirical orthogonal function (EOF) method, with the aim to determine the imposed processes and time-scales.Data on back-silting quantity in every dredging unit of the channel have been collected since March 2000, predominantly once 15 d.The EOF analysis of the back-silting strength reveals two significant modes, which totally explain 58.33% of the overall variance, and the corresponding processes and time-scales.The first EOF mode shows a clear annual cycle which is determined by the riverine water and sediment discharge from the upstream.The second EOF mode reveals a close relation between the back-silting strength and project activities.Because the processes are greatly interrelated in this study case, the other EOF modes accounting for 41.67% of the total variance do not show clear processes and time-scales. |
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