海域环境对悬浮泥沙扩散影响的敏感性分析  

Sensitivity analysis of the influence of oceanic environment on the suspended sediment diffusion

作　　者：陈翔[1] 王义刚[1] 黄惠明[1] 王时悦 关许为 

机构地区：[1]河海大学海岸灾害及防护教育部重点实验室,江苏南京210098 [2]交通运输部水运科学研究院,北京100088 [3]上海勘测设计研究院,上海200434

出　　处：《海洋通报》2016年第2期194-200,共7页Marine Science Bulletin

基　　金：国家科技支撑计划(2012BAB03B01)

摘　　要：通过建立二维潮流和悬浮泥沙扩散输移的数学模型,模拟恒定点源下,悬浮泥沙在不同本底含沙量和不同水深条件下的扩散状况,探讨悬浮泥沙扩散对影响参数的敏感性。结果表明:在研究悬浮泥沙扩散影响范围时,无本底含沙量的扩散影响范围最大;本底含沙量越大,扩散影响范围越小;本底含沙量对扩散低浓度增长区的影响大于高浓度增长区;水动力相似条件下,水深增大,悬浮泥沙扩散影响范围将减小;相对于本底含沙量,水深对悬浮泥沙扩散的影响更大。A two-dimensional current-sediment numerical model is built to modify the transportation of suspended sediments supplied by a constant point source under the condition of different background concentration values and different water depths. The sensibility of suspended sediment diffusion to influence parameters is discussed. The results show that considering the influential scope of the suspended sediment diffusion, that of no background concentration has the greatest scope; the bigger the background concentration value is, the smaller the scope of diffusion is; the influence of background concentration on the high concentration increment is greater than that on the low concentration increment; with similar hydrodynamic condition, the deeper the water depth is, the smaller the scope of suspended sediment diffusion is; comparing to the background concentration, the water depth has more influence than the suspended sediment diffusion.

关 键 词：悬浮泥沙 扩散影响 数学模型 敏感性分析 本底含沙量 水深 

分 类 号：P753[交通运输工程—港口、海岸及近海工程]