河道泥沙淤积
channel sediment deposition
河道允许淤积度
permissible deposition of river course
渭河河道及滩地自然区
physical area of Weihe river and its flooding land
航道淤积
Siltation of Channel
channel siltation
sedimentation in navigation channel
航道淤积厚度
siltation thickness in approach channel
外航道淤积
outer channel siltation
the outer navigation siltation