You are here
Residual currents-the variability of an inletsediment trapping mechanism
| Title: | Residual currents-the variability of an inletsediment trapping mechanism. |
 67 views 15 downloads |
|---|---|---|
| Name(s): |
Liu, James T. Harbor Branch Oceanographic Institute |
|
| Type of Resource: | text | |
| Genre: | Article | |
| Date Issued: | 1991 | |
| Publisher: | American Society of Civil Engineers | |
| Place of Publication: | New York | |
| Physical Form: | ||
| Extent: | 17 p. | |
| Language(s): | English | |
| Identifier: | FA00007253 (IID) | |
| Note(s): |
Between January 9-31, 1990, tidal current speeds collected in Sebastian
Inlet on the east coast of central Florida, shows that the average Eulerian and Stokes
residual currents are both lagoonward. This pattern can be used to explain the long-term
accumulation patterns (trapping) of marine sediments on the flood tidal delta
adjacent to the inlet. Numerical model results indicate that the Stokes residual current is
mainly determined by the tidal characteristics of the lagoon and ocean, and
subsequently, less variable. The lagoonward Eulerian currents on the other hand, are
interrupted by episodic storms which can cause abrupt superelevation of instantaneous
water-levels on the lagoon side of the inlet. The instantaneous superelevation of lagoon
water-levels and fresh water outflow can cause temporary reversal of Eulerian residual
current in the inlet, and thus, the reduction of the sediment trapping capability of the
inlet. Therefore, the overall effectiveness of sediment trapping in Sebastian Inlet is not
only determined by the tidal characteristics of the Atlantic Ocean and Indian River
lagoon, but also by the climatic pattern of the area, and by the long-term mean sea-level
difference between the lagoon and the ocean. Florida Atlantic University. Harbor Branch Oceanographic Institute contribution 823 This manuscript is an author version with the final publication available and may be cited as: Liu, J. T. (1991). Residual currents-the variability of an inlet sediment trapping mechanism. In N. C. Kraus, K. J. Gingerich, & D. L. Kriebel (Eds.), Coastal sediments ’91, Volume II: proceedings of a Specialty Conference on Quantitative Approaches to Coastal Sediment Processes, Seattle, Washington, June 25-27, 1991 (pp. 1419-1433). New York, NY: American Society of Civil Engineers. |
|
| Subject(s): |
Inlets Sediment Tidal currents Water levels |
|
| Persistent Link to This Record: | http://purl.flvc.org/fau/fd/FA00007253 | |
| Host Institution: | FAU |
