Hawaii Regional Sediment Management: West Maui Region; Nearshore Sedimentation at Honokowai Stream
ERDC Vicksburg United States
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PURPOSE This study was conducted as a conceptual effort, at an island scale as opposed to the extensive watershed scale within the continental United States, to apply the Coastal Modeling System CMS and the Particle Tracing Model PTM numerical models to investigate the transport and fate of inland sediment inputs to the nearshore littoral environment. In tropical islands with high elevations, terrestrial runoff can pose a severe threat to the health of surrounding coral reefs Pinniak 2004. Because inland sediment input to the nearshore littoral environment is a coral reef stressor, the CMS and PTM were applied to better understand the circulation patterns along the coast that influence the transport and fate of the Honokowai stream sediment inputs within the nearshore littoral environment of the West Maui, HI, region. Further comprehensive three-dimensional 3D modeling of the region is recommended to quantify cohesive sediment transport, temperature and salinity effects, and pre- and post-storm sedimentation data at coral reefs. BACKGROUND Regional Sediment Management RSM refers to the effective use of littoral, estuarine, and riverine sediment resources in an environmentally sensitive and economically efficient manner. RSM was officially implemented at the U.S. Army Corps of Engineers USACE, Honolulu District POH, in February 2004. The POH overall RSM strategy is to investigate RSM opportunities along all regions in Hawaii and the U.S. Pacific Territories. Conceptual regional sediment budgets have been developed in various regions throughout the islands to gain a general understanding of the control that morphology and coastal processes have on sediment pathways and transport volumes.
- Physical and Dynamic Oceanography
- Hydrology, Limnology and Potamology