Journal of Maps
نویسندگان
چکیده
Abstract: The retreat of chalk cliffs fringing the eastern English Channel contributes shingle to the beaches which helps to protect the cliffs and slow down erosion. Conversely, cliff retreat endangers settlements and infrastructure on the clifftop. Rates of retreat have been calculated by a variety of methods over the past century, but no attempt has been made to provide a complete coverage that allows for a true comparison of retreat rates over the entire coastline. Using historic maps and recent orthophotos, cliff retreat rates have been calculated for consecutive 50 m sections of chalk cliff along the English side of the entire eastern English Channel for a period of ∼ 125 years. The chalk cliffs of East Sussex erode at an average rate of 0.25 0.3 m y−1 while those in Kent at a rate of ∼ 0.1 m y−1.
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