Then a group of mathematical models for submarinetopography change are established.
然后建立一组反映海底地形及其变化的数学模型。
2
But submarinetopography changed differently in the different area, especially in the kinds of erosion and siltation.
但海底地形变化在不同的地段是不同的，且冲淤变化差异明显。
3
Based on this, by the visualizing treatment, manifold visual models of submarinetopography and its change have been formed in the area beginning from 1968 to 2000 year.