根据对珠江伶仃河口湾铜鼓水域丰水期9个测站大、中、小潮三次同步水文泥沙资料及57个底质样品的分析结果，本文讨论了此水域的水沙净输运趋势。结果表明，铜鼓水域表层余流向海，浅滩测站中底层余流指向河口方向，欧拉余流主要由径流构成。沟槽悬沙输运以净平流作用为主，浅滩区则以向上游的潮抽吸输运为主。沉积物净输运趋势显示铜鼓浅滩是海陆双向底质输运的汇聚地带。

This paper analyzes the dynamic characteristics of the variations of the beach volumes for three level zones of the Yanjing Beach in the Shuidong Bay of the western Guangdong Province by using the methods of dynamic system analysis and the multi-dimensional spectral estimation. The results show that the variations of the beach volume are characterized by the multiband oscillations with a dominant semimonth period. Upwards the low tide level, the beach tends to be stable. The estimates of the partial coherenees and the partial phases indicate that the variations of the beach volumes are mainly the results of the direct actions of the waves which are influenced by the tidal level changes and driven by the wind stress. The simulation results of the beach volume series for different beach height zones by threshold mixed regressive models indicate that the influence of the tide on the variations of the beach volumes is weak-ened and the direct actions of the wave energy and the wind stress are apparently enhanced with the increase of the beach height.

根据对粤东一岬间海滩冬夏季采集的表层泥沙的粒度分析结果，本文采用沉积物输运趋势概率模式对海滩泥沙沿岸运动方向作了统计分析，进而从波折射数值计算得到的波能流的沿岸分布讨论了对沿滩输沙的季节性效应。

根据粤东一岬间海滩碎波带短期实测的地形和波浪等资料，分析了此海滩碎波带的地形动力学特征与三维地形组合。结果表明，在正常波况下，此海滩碎波带显示了以砂坝。裂流槽谷为主的多种地形组合的变化过程。

High waves and storm surges caused by typhoon (or storm) are the disaster events for the serious erosion in coasts, to which scientists have paid close attentionts -z However, there have been little report on the response processes of the beach morphologies in different sections of the arc-shaped coast to such calamities. A sequence of beach changes that were measured in the field during the Typhoon 8616 at the arc-shaped coast of the Shuidong in Guangdong Province, South China is analyzed in this note.