The maximum depth and morphology of a convex(a rock projecting over the water)in any estuary or along ang coast can be approximately considered as the scour pit of the groin in the stream.

• 河口海岸山体凸体的冲刷坑最大深度及其形态,可以近似看作是在潮流作用下非溢流丁坝的坝头冲刷坑。