ABSTRACT
A reverse cyclic procedure, associated with coastal erosion and inland transference of successive spits, has been established by G. de Boer for Spurn Point at the mouth of the Humber to the north. The refraction factor operates by allowing the spit to move up the matrix if the random number selected lies within a specified range, which can be modified in the data input. The curvature of the main line of the spit is influenced by the refraction of the storm waves, coming from the south-west, which build up the main part of the spit. At high tide the distal end often forms an island as the tide washes across the low root area of the spit. Detailed measurements reveal that the spit has in general been increasing in length, area and volume. The relative abundance and complexity of spits around the coasts of the world at present, is the result of the immaturity of all coastlines.
