摘要
根据琼州海峡西口一测站4个季节的声学多普勒流速剖面仪（简称ADCP）回波强度数据以及现场采集的水样反演了悬沙浓度（SSC）．结果显示．春季悬沙浓度为0．017～0．05kg／m^3，平均0．025kg／m^3．夏季悬沙浓度为0．012～0．026kg／m^3，平均0．017kg／m^3．秋季悬沙浓度为0．012～0．074kg／m^3．平均0．028kg／m^3，冬季悬沙浓度为0．012-0．1kg／m^3。平均0．028kg／m^3，悬沙的沉积和再悬浮跟潮流密切相关，各季节流速的不同导致夏季悬沙浓度明显的小于其他季节，大小潮流速的差别导致大潮期间的悬沙浓度大于小潮期间的悬沙浓度．观测点海水和悬沙由表到底都是全年向西输送，春季净输沙量为-7．5×10^4kg，夏季净输沙量为-1．3×10^4kg，秋季净输沙量为-3．03×10^5kg．冬季净输沙量为-1．05×10^5kg．
The data were gathered during a water monitoring campaign which deployed ADCP and in situ bottle samplers in west of Qiongzhou Strait. Calibrated the backscattered ADCP signals against in-situ bottle samples of the suspended sediment,suspended sediment con centration（SSC） can be computed. The suspended sediment concentration computed in the Qiongzhou Strait with the equation show that the current magnitude effect the concentration of sediments in suspension. The average SSC in spring,summer,autumn and winter is 0. 025,0.017,0. 028,0. 028 kg/m^3 , respectively. Average current velocity in the four season is 39.6,26.8,50.2, 45.8 cm/s, respectively,The high concentrations of suspended material coincide with the higher current magnitudes, which induce increased bed shear stresses and vertical mixing. Conversely, suspended sediment concentration levels are markedly reduced. The net sediment transport in spring,summer,autumn and winter is - 7.5 × 10^4 , - 1.3 × 10^4 , - 3.03 × 10^5 , - 1.05 × 10^5 kg, respectively, negative value means the net sediment move from east to west. The net sediment transport from east to west all the year long in the study site.
出处
《厦门大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第1期144-148,共5页
Journal of Xiamen University：Natural Science
基金
国家"908"专项(908-01-ST09)资助
关键词
琼州海峡
ADCP
悬沙浓度
净输沙量
Qiongzhou Strait
ADCP
suspended-sediment concentration
net sediment transport
