期刊
INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
卷 23, 期 1, 页码 69-75出版社
IRTCES
DOI: 10.1016/S1001-6279(08)60006-2
关键词
non-uniform sediment motion; bed material distribution; incipient velocity
Based on the mechanism of non-uniform sediment incipient motion, the dragging force and uplift force coefficient expressions are put forward for the non-uniform bed material exposure and close alignment state. The incipient velocity formula of the non-uniform sediment is then established. It is shown that the formula structure is reasonable,and fine particles of the non-uniform sediment are more difficult to set into motion than the same sized uniform particles, whereas coarser particles are easier to set into motion than their uniform equivalents. The validity of the formula is verified by field and experiment data.
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