流水动力地貌是地表水流运动过程与地球表层物质相互作用的产物，具有显着的环境效应。流水动力地貌学是界于流水动力学、泥沙力学及流水地貌学之间的新兴的富有生命力的边缘科学。运用基于牛顿力学相似论及系统论异构同功原理的物理模型可以有效地研究流水动力地貌特征、成因机制及作用过程。数学模拟与物理模型相互印证，开辟了一条富有发展前景的流水动力地貌研究途径。

Fluvial dynamic geomorphology is producgion, which is formed by reaction between fluvialbehaviour and surface material on earth. It possesses significant response to environments. Asa branch of geomorphology, the fluvial dynamic geomorphology is charecterized by frontierscience among fluid dynamics, sediment mechanics and fluvial geomorphology. With physicalmodelling by similarity based on Newtonian mechanics, and principle of the same effect butdifferent structure based on systematic theory, it is available to study on features, formation andprocesses in fluvial dynamic geomorphology. A new research method, which is a combinationof mathematical simulation by computer with physical modelling will be opened.