潮汐河段的挖入式港口可分为两类,一类是港口面积(以下均指水域面积)远大于港内航道口门断面面积的,称为“大港水域”或称口袋形港口如图1所示;另一类是港口面积与港内航道口门断面面积的比值相对较小,如图2和图3所示称“小港水域”。本 Digging ports in the tidal reach can be divided into two categories, one is the port area (hereinafter referred to as the water area) is much larger than the cross-sectional area of ​​the port, known as the “big port waters” or pocket-shaped port shown in Figure 1 ; The other is the ratio of the port area to the port cross-sectional area of ​​the inland navigation channel is relatively small, as shown in Figure 2 and Figure 3 as “small port waters.” this