福建宁德半岛沿岸泥沙运动和沉积速率研究

LONGSHORE SEDIMENT MOVEMENT AND SEDIMENTATION RATES OF NINGDE PENINSULA,FUJIAN

利用风要素计算福建宁德半岛沿岸输沙率。半岛南侧各岸段的净输沙率较小，岸滩基本处于）中淤动态平衡状态。半岛东北侧年净输沙率小于西南侧，半岛东北侧每年约有13万m。量级的沿岸泥沙输往晴川湾顶，西南侧每年约有26万m^3量级的沿岸泥沙输往文渡湾顶。半岛及其附近海底表层和柱状沉积物粒度以及^210Pb沉积速率测定结果可知：海底表层沉积物单一，以细颗粒的粘土质粉砂为主，沉积速率在0．33～2．0cm／a之间，比类似海湾沉积速率较大，说明半岛沿岸和海底沉积速率分布不均。

The wind element is applied to calculate the long shore sediment transport rate of Ningde Peninsula, Fujian. The net sediment transport rate of south Peninsula is tow, and the shore-beach is in the dynamical equilibrium situation. The net sediment transport rate of northeast Peninsula is lower than that of southwest Peninsula. There is about 130,000 m^3 sediment along the northeast Peninsula transported to the top of Qingchuan Bay every year, while 260,000m^3 sediment along the southwest transported to the top of Wendu Bay. According to the granularity parameters of surface sediment and columnar types as well as the determination of sedimentation rate by ^210Pb-Method, the surface sediment is unitary; whose main component is clayey silty sand. The sedimentation rate, which is between 0.33cm/a, and 2.0cm/a is higher than that of other bays, explaining the uneven distribution sedimentation rate of long shore and seabed.