A vessel travelling down a narrow channel， especially if the draft is nearly equal to the depth of water， may set off the nearer side.This effect is known as .

A vessel travelling down a narrow channel， especially if the draft is nearly equal to the depth of water， may set off the nearer side.This effect is known as .
A.smelling the bottom
B.squatting
C.bank suction
D.bank cushion
正确答案：bank cushion