Long-Term Profile and Sediment Morphodynamics: Field Research Facility CaseHistory

摘要

Surface sediment grab samples were collected along one profile line at the FieldResearch Facility (FRF) at Duck, NC, over a 17.8-month period from March 1984 to September 1985. Profile surveys were taken about every 2 weeks, with sediment samples collected approximately once a month. Extra profile and sediment samples were collected after storms. This comprehensive data set of beach profiles, sediment, and wave and weather conditions provides a unique opportunity to examine natural profile changes and resulting changes in sediment grain-size distribution along the entire length of an active profile and to test and evaluate models of beach profile/sediment interactions to changing coastal processes. Spatial changes indicate that the most active part of the profile at the FRF is the bar/trough area that alternately moves seaward after storms and migrates landward during fair weather wave conditions. The highest variability in sediment grain-size distributions occurred on the subaerial beach and foreshore area. Beach cross-shore sediment distributions, Long-term beach, Beach profile/sediment interaction, profile change, Beach sediment modeling, Waves.