The seabed terrain, sand wave migration and the growth of regional erosionditch create subsea pipeline suspended span.
沙波沙脊区海底管线悬跨的产生，主要是海底地形、沙波的移动和区域性冲沟的发育所造成的。
2
The look of erosion part of jade have eroded hole (Mayi Dong), Hang erosion, erosion spots, erosionditch, erosion vein (mesh and whirlpool) and surface erosion, and so on.
Sloping spatial distribution of soil nutrient loss responds to spatial distribution of soil erosion patterns erosion intensity. Shallow gully ditch is the severest position of soil nutrient loss.