连云港港主体港区口门浅滩深水航道三维横流特性研究

Study on 3D Cross-flow Characteristics of Deepwater Channel in Estuarine Shoal of Lianyungang Main Port Area

应用基于有限体积法的FVCOM建立了连云港海域的三维潮流数学模型,利用详细的实测水文资料进行了验证,结果较为满意。研究了连云港港主体港区旗台防波堤口门区域的三维潮流特征和浅滩深水航道的三维横流特性。结果表明,受北防波堤挑流影响,口门段航道最大横流出现在北防波堤堤头附近的航道横断面内,其中涨潮最大横流发生在中潮位前后1 h内,落潮最大横流发生在高潮位后1~2 h内。航道内表层和中层的横流数值较为接近,但由于航道内深层水流受航道约束更大,底层横流数值减小迅速。

FVCOM based on finite volume method was applied to establish a three-dimensional mathematical model of Lianyungang sea area. The results were verified satisfactorily by use of detailed actually measured hydrological data. This paper analyzed three-dimensional flow characteristics and cross-flow characteristics of deepwater channel in estuarine shoal of Lianyungang main port area. The result showed that affected by trajectory bucket of north breakwater, the maximum cross-flow appeared near the channel cross-section of north breakwater head, the largest cross-flow at high tide would occurred before and after 1 h in middle tidal level, on the contrary, the largest cross-flow at ebb tide would occurred within 1 ~ 2 h after high tide level. The value of cross-flow in surface and middle were relatively close, but the bottom decreased rapidly because of the channel boundary.