北海港湾环流和油类扩散数值模拟  

NUMERICAL MODELING OF CIRCULATION AND POLLUTANTS DISPERSION IN THE BEIHAI BAY

作　　者：李树华[1] 陈文广[1] 

机构地区：[1]广西海洋研究所

出　　处：《海洋通报》1990年第3期1-8,共8页Marine Science Bulletin

摘　　要：本文采用数值模拟方法,研究了北海港湾的流场状况和油类扩散规律。经与实测资料检验,模拟结果与实测结果基本相符。根据计算结果,可得出如下几点结论:①根据各时刻的流场图,在低潮和高潮时刻,湾内流向紊乱,流速较弱,在湾中出现了涡旋区。而在半潮面附近,流向较为一致,流速较大。总的来说,落潮流速比涨潮流速大;②湾中潮流主要为往复流或接近于往复流,潮流的旋转方式主要为逆时针向旋转;③潮余流在湾中出现8个较明显的小涡旋,其中5个为顺时针向涡旋,3个为逆时针向涡旋。潮余流流速一般为0.5～4cm/s;④北海港湾局部区域目前已受到了污染,水质以二类标准为主,在南流江口附近及港口内,属三类水质,相对地说,高潮时的水质比低潮时稍好。The tidal current field in the Beihai Bay has been studied by numerical method in this paper. The comparison of the calculated values with the observed ones shows that the computations basically tally with the observation. Several conclusions hare been drawn as follows: 1. Tidal flows are disorderly and their speed are low, according to the flow field diagrams, and there are eddies in the bay. When near half tidal level, the directions of flows are indentical and speeds are high. The speed of ebb tide is higher than that of flood tide in most cases; 2. Reciprocal fiow dominates over tidal current and moves clockwise mainly; 3. There are eight eddies induced by tidal residual current in the bay, of which five are clockwise and three counter-clockwise. The velocity of the residual current is about 0.5-4cm/s.

关 键 词：港湾 环流 油类 扩散 模拟 北海 

分 类 号：X55[环境科学与工程—环境工程]