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Model Experiment on Turbidity Caused by Pump Dredging (Part-2)
| Publication year | Port and Airport Research Institute Technical Note 0420 1982.06 |
|---|---|
| Author(s) | Yasuo SHIRATORI,Katsuto MASUDA,Hideo KATO,Sakae YAMAUCHI |
| Department /Divison |
Machinery Division Sludge Treatment Laboratory |
| Executive Summary | Authors carried out model experiments on turbidity caused by pump dredging to investigate the relationships between turbidity and operating conditions. The model bottom material consists of flyash and bentnite. Turbidity is mainly caused by the contact of the cutter head with the bed. Owing to the dredging mechanism, SS concentration at the right side of the cutter head is greater than that at the other side regardless of the swing direction. And turbidity is mainly generated in the right swing operation. The amount of turbidity depends greatly on the peripheral velocity of the cutter and does not depend on the swing velocity. The cutting depth, that is one of the operating conditions, is also an influential factor on turbidity. When it is less than a half of cutter diameter the amount of turbidity is greater than those in other cases. The influence of operating conditions on turbidity can be expressed by the equation, that consists of non-dimensional numbers declaring operating conditions. |
| PDF File | /en/pdf/en/no0420.pdf |
