North of Tunisia we find erosion rates of the coastal sandy beach of 5m/year, and more, Ghar el Melh lagoon.
What are erosion rates in your countries?
dear colleague
All along the Nord Sea coast of the Netherlands sandy beaches and sand dunes erode. The dunes protect the urbanized lowlands behind the dunes against flooding. The erosion rates vary per site and over time. An average rate is not really a useful variable given de vagaries of force and direction of the erosive storms, combined with tides and waves. For decades, the beaches and dunes have been stabilized by suppletion of sand dredged from the sea bottom some distance away from the coast. The dredge sand is applied to the beach itself. Further, artificial sand ridges are created in de sea in front of the beach to break the force of the waves. The information in the link below may be of interest in answering your question:
https://www.rijkswaterstaat.nl/water/waterbeheer/bescherming-tegen-het-water/maatregelen-om-overstromingen-te-voorkomen/kustonderhoud
regards
Thanks Hein
Netherlands is at the front line for sea défenses... I know other places in Europe where it has been done. This has a huge cost which South countries can not afford. Here in Tunisia for instance i doubt that we can do this, except externat support. So we try natural solutions at low cost to reduce the speed of the submersion...
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