厦门湾悬沙分布特征与动力分析  

Distribution Characteristics of Suspended Sediment and Dynamic Analysis in the Xiamen Bay

作　　者：郑祥靖[1] 潘伟然[1,2] 张国荣[1,2] 于小龙[1] 陶小琴[1] 林毅辉[1] 

机构地区：[1]厦门大学海洋与地球学院 [2]福建省海洋环境科学联合重点实验室,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2013年第4期539-544,共6页Journal of Xiamen University：Natural Science

基　　金：福建省科技厅专项经费项目(2010Y0064);厦门市海洋与渔业局专项经费项目

摘　　要：利用2011年1月厦门湾3个观测站声学多普勒流速剖面仪(ADCP)回波强度数据与现场水样采集反演出了悬沙浓度,并估算了单宽输沙量.经统计分析表明,厦门湾冬季1月份整体悬沙浓度较小,西海域悬沙浓度大于东海域,近水面悬沙浓度小,由表层到底层逐渐递增;而在时序分布上,悬沙浓度变化与潮流密切相关,呈现出往复运移的趋势,并且大潮期间的悬沙浓度大于小潮期间的悬沙浓度.此外,厦门湾内单宽输沙量一般在半潮面时最大,而在湾外,单宽输沙量在接近平潮或停潮时达到最大,冬季净输沙量整体较小.The suspended sediment concentration （SSC） and the sediment transport rate in Xiamen Bay were calculated, based on the hackseattered signals observed by the acoustic doppler current profilers （ADCP）, which had been calibrated against in situ bottle samples of the suspended sediment in January 2011. The statistical analyses show that the SSC of Xiamen Bay is low in January,and the SSC in Xiamen Western Bay is larger than the SSC in Xiamen Eastern Bay. The retrieval results also show regular vertical varia- tion,that the SSC increases from the surface layer to bottom layer. Moreover,by analysis of time series,the SSC variations in a tidal cycle also have close relation with tidal currents. In addition, the high concentrations of suspended sediment coincide with the stronger tidal currents due to the tidal dispersion and vertical mixing. Furthermore, the net sediment transport is low in winter and sediment transport rate reaches its maximum in a tidal cycle at half-tide level in the inner bay of Xiamen,while the maximum of sediment trans- port rate is at slack tide in the outer bay.

关 键 词：回波强度 厦门湾 悬沙浓度 潮流 单宽输沙量 

分 类 号：P731[天文地球—海洋科学]