sedimentatevt.沉积sedimentn.沉淀物sedimentary-volcano stratum沉积-火山岩地层sediment and internal loading沉积物与内源污染sedimentary microfacies model沉积微相模型sedimentary deposits in water水系沉积物sedimentation velocity method沉降速度法sedimentary-metamorphic type沉积变质再造sediment transport equilibrium输沙平衡sediment transport rate method沙量平衡法sediment movement in estuaries河口泥沙运动sedimentary facies association沉积相组合