Coasts, estuaries and deltas are dynamic environments of multi-scale interactions between land and water that are of great human and economic interest. Estuaries and deltas form the support system for ecosystems that are among the richest and most productive on Earth. This open session invites presentations on all aspects at the interface between subaquaeous and subaerial systems, including: surf zone and wave shoaling, swash zone dynamics, beach morphology and sediments, berm development, back-beach environments, coastal dune systems, lagoons, estuaries, bays, barrier island systems, mud-flats and coastal marsh lands, deltas, rock-platforms, cliff erosion processes, and other coastal and estuarine landforms and processes. The session covers sedimentary and erosional systems, the full range of temporal and spatial scales, experimental results and theoretical models, and also considers the impacts of climate change and sea-level rise.