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中文摘要：
以野外现场调查、数值模拟和前人研究成果综合分析虎门的地貌动力学特征。因峡口上、下游水域开阔，涨落潮过程中发育着强大的双向不对称射流系统；由于峡口区流速最大，发育着冲刷深槽，而峡口的上、下游因流速降低，泥沙有规律地沉积，形成了涨潮三角洲与落潮三角洲堆积体，出现纵向上“马鞍”形断面特征和横向上“槽-脊-滩”的地貌特征，与其动力特征相适应。
英文摘要：
The study focuses on the morphodynamics of Humen outlet based on the hydrographic investigations, numerical simulations and historical research data. There exists a bi-direction asymmetry jet system caused by expanding upstream and downstream reaches of the rocky gorge. With the largest current velocity in the gorge and the smaller velocity in its upstream and downstream reaches, the riverbed is scoured into a trough in the gorge, while sediment aggrades regularly in both the upstream and the downstream reaches of the gorge and forms a deposit composed of a flood delta and an ebb delta. The deposit has a saddle-shaped section lengthways and a morphological characteristic of ＂trough-ridge-shoal＂ breadthways, accordant with its dynamic character.
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