By Institution of Civil Engineers

ISBN-10: 0727732889

ISBN-13: 9780727732880

This quantity offers the complaints of the 2d foreign convention on upkeep Dredging in may well 2004. the aim of the convention used to be to supply a entire replace on all elements of upkeep dredging together with legislation, dredging equipment, dredged fabric therapy and invaluable use, agreement administration, and environmental influence overview and mitigation

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Extra info for 2nd International Conference on Maintenance Dredging

Example text

The output consists of two graphs, the fluid mud layer thickness at several moments in time and the production rate as a function of the distance from the location of dredging operations. HESK 43 The upper graph predicts the behaviour of the density layer both as functions of distance along the channel from the dredging operation and time. Figure 4 shows that the density layer increases in thickness the further it gets from the dredging site (mainly from erosion and deposition from the underlying and overlying layers respectively) but reduces, as would be expected, over time.

This legislation has jurisdiction over operations which require both the removal of sediment from the seabed and subsequent re-deposition from a vessel. As both the first two of the three methods above do not require such re-deposition from a vessel, they fall out with the coverage of the current legislation and, as a consequence, no FEPA (or equivalent) disposal licence is required. Maintenance Dredging II, Thomas Telford, London, 2005. 40 MAINTENANCE DREDGING Whereas hydrodynamic processes are relatively cheap and easy to use, a potential problem has always been that, once mobilised, the control of the sediment is limited and its final destination difficult to predict.

It has been suggested to applicants in the past that they should be allocating for capital projects up to 10% of the predicted cost of the works to fund extra beneficial disposal options, but this does not appear to be a consistently applied approach. Given the long time periods required for planning approvals or environmental investigations, it would seem likely that many alternative disposal options will need to be promoted by others - local authorities, flood prevention agencies or conservation bodies, working in conjunction with the harbour authorities or others planning to carry out dredging.

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2nd International Conference on Maintenance Dredging by Institution of Civil Engineers

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