Experimental Study on Local Scour and Related Mechanical Effects at River-Crossing Underwater Oil and Gas Pipelines

Table 2

Physical properties of sediments.

	Clay	Fine sand	Medium sand 1	Medium sand 2	Coarse sand	Very coarse sand	Very fine pebbles
Dry density (g·cm^−3)	1.40	1.37	1.34	1.29	1.22	1.30	1.23
Wet density (g·cm^−3)	1.55	1.43	1.47	1.55	1.39	1.56	1.49