The interconnections between beaches and dunes. These involve the aeolian transport of sand from the beach to the erosion of the dune by storm waves. Houser (2009) PPG 33, 6 considers the role of nearshore processes and morphological change as a flexible and dynamic constraint on the supply and transport of sediment between beach and dune. See Servera and Gelabert (2009) Geomorph. 110, 3–4 on the development and setting of a beach–dune system in Mallorca.