By introducing the ancient Chinese poem"a boat is moved to moor at a misty sandbar",we discuss the amazing transportation phenomenon of sands in water in the frames of poetry and mechanics.We reveal the key role of water in shaping the landform,mainly including the erosion,transportation and sedimentation processes.All of them have considerable effects on the formation of landforms.By analyzing the Stokes number,we discuss the motions of suspended sand particles in the moving fluid,which result in either the transportation or the deposition modes of sands in the river.Furthermore,we take typical islets as examples to reveal the amazing mechanism of hydraulic effects and resulted landform evolution.
关键词
烟渚/流水输运/斯托克斯数/江心洲
Key words
islet/water transportation/Stokes number/central bar
万方数据