It is emphasized that the first flooding surface (FFS) is used as a standard or useful marker in optimizing chronostratigraphic and lithostratigraphic boundaries.
And the boundary of them has the same lithologic character: the ravinement surface of river course or exposure mudstone of flooding plain and root clay.
For the plate tower, in revamp for capacity increase the downpipe of the plates generally becomes the bottleneck, and flooding of the downpipe is liable to occur.The DJ type plates h...