Accession Number : ADA571681


Title :   St. Augustine Inlet, Florida: Application of the Coastal Modeling System. Report 2


Descriptive Note : Technical rept.


Corporate Author : ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB


Personal Author(s) : Beck, Tanya M ; Legault, Kelly


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a571681.pdf


Report Date : Aug 2012


Pagination or Media Count : 97


Abstract : This report, the second in a series, documents a numerical modeling study performed with the Coastal Modeling System (CMS), supported by field data collection, to quantify the impact of historical and future planned mining of the ebb-tidal delta at St. Augustine Inlet, FL. Recently, in the years 2001-2003 and 2005, two nourishment intervals utilized beach-quality sediment from the ebb-tidal delta at St. Augustine Inlet, resulting in 4.7 and 2.5 million cubic yards of sediment removed from the inlet system, respectively, for the two time periods. The CMS was used to determine the impact of these historical mining operations, as well as potential future minings on the natural littoral system in the vicinity of the inlet as well as the morphodynamics of the inlet. Quantitative comparisons of planform evolution, volumetric change, and transport pathway spatial distribution and magnitude were made for the historical and future scenarios. Results showed little to no changes in the ebb-tidal delta trajectory in these three quantitative comparisons. The footprint of the ebb-tidal delta mining did not change the bypassing patterns in a way such as to cause significant morphologic change to the inlet system. Modeling of planned alternatives including the removal of an additional 1.5, 3, and 4 million cubic yards (mcy) of sediment also illustrated a tipping point in morphodynamic response in varying volume removed and mining design.


Descriptors :   *INLETS(WATERWAYS) , *SEDIMENT TRANSPORT , BATHYMETRY , CALIBRATION , COASTAL REGIONS , CURRENTS , DATA ACQUISITION , FIELD TESTS , FLOODS , FLORIDA , FRICTION , GRAIN SIZE , HYDRODYNAMICS , MORPHOLOGY , TIDES , VELOCITY , WAVES


Subject Categories : Physical and Dynamic Oceanography
      Hydrology, Limnology and Potamology


Distribution Statement : APPROVED FOR PUBLIC RELEASE