| DRY-SEASON VARIABILITY IN SUSPENDED SEDIMENT CONCENTRATIONS IN THE SOUTH PASSAGE OF THE CHANGJIANG ESTUARY |
| |
| 作者姓名： | Wenxiang ZHANG Shilun YANG Jun ZHU Shiliang GONG Pingxing DING |
| |
| 作者单位： | [1]Dr., Instructor,State Key Lab of Estuarine ＆ Coastal Research, East China Normal University, Zhongshan N. Rd., 3663, Shanghai 200062, China [2]Dr., Prof., State Key Lab of Estuarine ＆ Coastal Research, East China Normal University, Zhongshan N. Rd., 3663, Shanghai 200062, China [3]Ph.D. Candidate, Department of Environmental, Coastal and Ocean Science, University of Massachusetts, Boston, MA 02125-3393, USA [4]Ph.D. Candidate, State Key Lab of Estuarine ＆ Coastal Research, East China Normal University, Zhongshan N. Rd., 3663, Shanghai 200062, China |
| |
| 摘 要： | This paper reports the results of continuous monitoring of turbidity, water depth, salinity (using an Optical Backscatter Sensor (OBS)), and current velocity (using a Current meter (SLC9-2)) in the South Passage of the Changjiang Estuary over a spring–neap period in February 2003 (dry season). The turbidity measured via OBS was closely correlated with the suspended sediment concentration (SSC), which was highly variable. Over the study period, the SSC in the middle layer ranged from 110 to 1400 mg/l. The minimum SSC occurred during a late ebb tide, and the maximum SSC occurred during a late flood tide. On average, the SSC was 1.5 times higher during flood tide than during ebb tide. Vertically within the water column, SSC increased downward, with the ratio of SSC measured near the bed to that measured at the surface ranging from 1.90 to 18.3. The temporal variability in SSC is jointly governed by tides and wind-induced waves, whereas the vertical variability in SSC is attributed to the effect of gravity and vertical water circulation.
|
| 关 键 词： | 变异性 干涸季节 悬浮物 沉积物 长江 |
| 修稿时间： | 2006-04 |
DRY-SEASON VARIABILITY IN SUSPENDED SEDIMENT CONCENTRATIONS IN THE SOUTH PASSAGE OF THE CHANGJIANG ESTUARY |
| |
| Wenxiang ZHANG Shilun YANG Jun ZHU Shiliang GONG Pingxing DING.DRY-SEASON VARIABILITY IN SUSPENDED SEDIMENT CONCENTRATIONS IN THE SOUTH PASSAGE OF THE CHANGJIANG ESTUARY[J].International Journal of Sediment Research,2007,22(3):199-207. |
| |
| Authors: | Wenxiang ZHANG Shilun YANG Jun ZHU Shiliang GONG Pingxing DING |
| |
| Abstract: | This paper reports the results of continuous monitoring of turbidity, water depth, salinity (using an Optical Backscatter Sensor (OBS)), and current velocity (using a Current meter (SLC9-2)) in the South Passage of the Changjiang Estuary over a spring-neap period in February 2003 (dry season).The turbidity measured via OBS was closely correlated with the suspended sediment concentration (SSC), which was highly variable. Over the study period, the SSC in the middle layer ranged from 110 to 1400 mg/l. The minimum SSC occurred during a late ebb tide, and the maximum SSC occurred during a late flood tide. On average, the SSC was 1.5 times higher during flood tide than during ebb tide. Vertically within the water column, SSC increased downward, with the ratio of SSC measured near the bed to that measured at the surface ranging from 1.90 to 18.3. The temporal variability in SSC is jointly governed by tides and wind-induced waves, whereas the vertical variability in SSC is attributed to the effect of gravity and vertical water circulation. |
| |
| Keywords: | Suspended sediment concentration (SSC) Optical Backscatter Sensor (OBS) Sediment dynamics Changjiang Estuary |
| 本文献已被 维普 万方数据 等数据库收录！ |
|
