The main tasks and methods are onshore and underwater topographic survey and observation, especially for sections and beaches which have serious problems of riverbank collapses in recent years.

• 监测的主要内容和方法是对近年来崩岸严重的河段和深泓贴岸、迎流顶冲、无滩或窄滩河段进行岸上地形测量和观测及水下为地形测量。