By Peter W. French
Coastal Defences goals to offer the wide spectrum of equipment that engineers use to guard the sea coast and investigates the kinds of matters which can come up consequently. the 1st part of the e-book examines 'traditional' not easy suggestions, reminiscent of sea partitions and groynes, while the second one seems to be on the more moderen pattern of utilizing ideas extra sympathetic to nature. through all of the major equipment of coastal defense intimately, the ebook investigates the explanation for utilizing every one strategy and the ensuing administration matters, proposing a case for and opposed to all of the concepts.
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Additional info for Coastal Defences: Processes, Problems and Solutions
6 Generalised coastal sediment budget. Each component will vary in importance depending on coastal location. details). In this case, input from the eroding cliffs was estimated at 14 250 m3 aϪ1, which reduced to 4 500 m3 aϪ1 after construction of an offshore breakwater: a reduction of 68 per cent.
The placing of inanimate objects in the wind ﬂow can promote the deposition of sand. Once initiated, the planting of stabilising vegetation which can keep pace with sediment accretion will allow these areas to develop into embryo dunes, and subsequently development into mature dunes. Concept of the coastal sediment budget The previous discussion of waves, tides, and wind has shown how sediment and its movement is critical to the stability of a coastline. In order to be able to decide how to manage a length of coast, it is important to know how much sediment is available, where it is coming from, where it is stored, and how it leaves a particular coastal area.
This hypothetical scenario represents very much a traditional approach to solving the problem. The chain of events described poses an important question: would it not be possible to tackle the initial problem in a different way, so as to reduce the knock-on impacts of the initial defence technique? If one takes a step back and identiﬁes the original cause of the problem, the whole issue could be looked at differently. Initially, cliff erosion was the trigger for defence construction. Cliff erosion is not a continuous process but occurs intermittently.
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