这些平原内的河流交叉成网，四通八达，河面宽度大多在20米到50米之间，水深在3米到5米左右。
These plain within the river cross into the net, extending in all directions, mostly in the river width of 20 meters to 50 meters water depth of 3 m to 5 meters.
河流中沙垄和逆行沙垄的存在，使局部水深交替地增大或减小。
The presence of dunes or antidunes in streams alternately decreases and increases the local depth.
由于泥沙的沉积，河床抬升，水深变小，水流速度场在整个堆积扇上明显增大，并在三角洲前缘出现明显的绕岛环流和河流分叉现象。
The water depth reduced due to deposition, the water flow velocity upon the alluvial sector increased obviously and at the front of the delta exists currents around the sand bar.
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