Numerical modeling of the changes of tidal amplitude and phase due to the MSL rise was made by the use of tidal basic equations in rectangular bays with mouths open to the south and tortuous bays.

It is shown that the value of water-level interval has great influence on the operation and control process;an optimal water-level amplitude does exist,which can .

The background of a west communication science & technology project whose topic is structural model and cargo-handling technology of the quay with high amplitude of water level in Lantsang is introduced, and its main research content, research of key technology and main findings are introduced too.