Beach Renourishment by Eric Bird, Nick Lewis

By Eric Bird, Nick Lewis

Beach renourishment is the recovery of shores which have been depleted. The textual content offers with the assets of seashore sediment in addition to the reasons and common responses to seashore erosion, prior to dialogue of seashore renourishment.

Some of the 1st documented renourishment tasks have been undertaken within the early 1900’s at the east coast of the USA. a number of nations have on the grounds that renourished shores, rather in the past few a long time. so much initiatives were within the usa, the uk, a few eu international locations and Australia. those are reviewed and event from a number of seashore renourishment tasks used for dialogue of the next topics:

1. the necessity for initial investigations
2. assets of sediment for seashore renourishment
3. tools of seashore renourishment
4. layout considerations
5. tracking adjustments after seashore renourishment
6. evaluation of performance
7. Modelling of seashore renourishment
8. seashore renourishment for coast protection
9. Environmental impacts
10. charges and benefits
11. reaction of renourished shores to a emerging sea level

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Dynamic revetments are therefore a variation of beach renourishment. 11). Other ‘soft’ methods of managing erosion include efforts to manage coastal dunes. As mentioned previously (Sect. 4, p. 14) dunes can supply a beach with sediment but also form a protective feature and therefore form an integral part of the beach system. 12). Dunes have been created and built up using clay cores (Wamsley et al. 2011), sand-filled bags (Komar and Allen 2010) and dredge material (Matias et al. 2005), all with varying levels of success.

J Coast Res 59:202–210 (special issue) Chapter 4 Beach Renourishment Principles Abstract This chapter provides a discussion of fundamental beach renourishment principles, including the need for preliminary investigations, sources of sediment for beach renourishment, methods of beach renourishment, design considerations, techniques for monitoring changes, assessment of performance and modelling. 1. 2. 3. 4. 5. 6. 7. 8. 1 The Need for Preliminary Investigations It is necessary to decide where and why beach renourishment is necessary, where and how sediment should be delivered to the shore, and what difficulties are likely to be encountered during and after renourishment.

With the development of large dredging barges, sourcing of sediment from distal offshore areas has become more common. In Malta, there are no significant offshore sources of sand available. Instead, sand for use in beach renourishment must be crushed from rock originating from overseas quarries as local limestone is too friable (Firman et al. 2011). Sand was brought from a distance to improve Waikiki beach at Honolulu in Hawaii (Finkl and Walker 2004). The natural beach at Honolulu was originally rather meagre on a rocky, reef-fringed shore, until it was renourished in several stages beginning in the 1920s.

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