The risk of bank collapse can be divided into strip bank collapse, scouring bank collapse and nested bank collapse. Strip collapse refers to a long-term collapse along the river bank, which mainly occurs on the river bank with little change in coastal water flow conditions and geological conditions. Scouring collapse is the scouring of the river beach caused by the scouring action of water flow and waves. Cavity collapse refers to the collapse of soil to the shore in blocks under the action of river bank water flow.