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崖门是珠江河口八大口门之一,是连接黄茅海和崖门水道的基岩峡口通道.由于口门上、下游方向水面放宽,形成了独特的双向不对称射流体系.本文根据实测水文资料、历史海图,应用ECOMSED模型对崖门射流系统的动力结构、动力平衡及其对沉积的作用进行地貌动力分析.研究表明:(1)崖门的动力结构中非线性作用不能忽略,科氏力和摩擦力大体在同一量级,但摩擦力的作用更强;(2)不对称双向射流在峡口以北为涨潮优势流,以南为落潮优势流;(3)双向射流系统是崖门深槽得以长期保持稳定的主导因素.
Yamen is one of the eight port gates of the Pearl River estuary and connects the bedrock gorge gateway of Huangmaohai and Yamen waterways. Due to the widening of water surface in the upper and lower reaches of the mouth gate, a unique bidirectional asymmetric jet system is formed. Hydrological data and historical charts, the dynamic structure and dynamic balance of the Yamen Jet system and its effect on sedimentation are analyzed by using the ECOMSED model.The results show that: (1) the nonlinear effect of the dynamic structure of Yamen can not be neglected, Coriolis force and friction are on the same order of magnitude, but the effect of friction is stronger; (2) Asymmetric two-way jet flows to the north of Gap, which is the tidal-dominant flow and south to the ebb tide. (3) Bidirectional jet system Yamen deep groove to be long-term stability of the dominant factor.