Enhancement and Development of Numerical Models for Simulating Coastal Sediment Transport and Morphology Evolution
Abstract
The GENESIS model has been successfully used in numerous prototype studies involving long-term beach evolution. The model represents longshore subaqueous sand transport processes. However, in many projects, subarial processes such as swash transport and dune erosion plays an important role, not only for the short-term storm erosion but also for the long term evolution. For this reason, the GENESIS modeling system was further developed to include these processes. The proposed theoretical and modeling approaches were validated against a groin shortening study in Westhampton Beach, Long Island, NY. Westhampton is located on the eastern south shore of Long Island, between Shinnecock Inlet and Moriches Inlet (Fig. 1). In December 1992, 22 years after Groins 12-15 were constructed, a northeaster opened two inlets (called Pikes Inlet and Little Pikes Inlet) directly west of the groin field. Pikes Inlet, located most westward, gradually shoaled and was readily closed manually (Bocamazo and Grosskopf 1999), but Little Pikes Inlet enlarged in the eroding down-drift area directly west of Groin 15 (Fig. 2). In November 1993, NAN closed the breach by hydraulic fill placement (Bocamazo and Grosskopf 1999). In 1996-1997, a tapered groin transition to the west was created by shortening Groins 14 and 15 and adding a short groin (called Groin 1 4A) between them. Groins 14 and 15, originally 480 ft in length were shortened to 417 ft. Groin 14A, constructed between Groins 14 and 15 in 1997, is 337 ft long. Groins 1-13 are 480 ft long. Groins 1-13 have not been maintained, and possible shortening would offer the opportunity of refurbishing these groins as needed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 2007
- Accession Number
- ADA473190
Entities
People
- Hans Hanson
Organizations
- Lund University