Preliminary Design of the Quogue Beach Nourishment Project
- 1. Preliminary Design ofthe Quogue Beach Nourishment Project Village of Quogue NY Aram Terchunian – Project Director Tim Kana – Sr Consulting Scientist Haiqing Kaczkowski – Project Engineer First Coastal Corporation & Coastal Science & Engineering
- 2. Beach Profile –The Shore Zone That Absorbs Breaking Waves Average Waves Storm Waves After Komar 1998
- 3. “Profile Volume” Equilibrium Profiles ProfileShape Will Change Frequently. But If the Profile Volume Remains Constant, The Beach Is In Equilibrium After Kana 1990
- 4. Offshore Bar Application To QuogueBeach “Profile Volume”
- 5. The First Coastal– CSE Team Determined: - Quogue Beach (~2.7 miles) has lost ~60,000 cy/yr since the 1950s. This is equivalent to ~5 ft/yr shoreline recession. - There is a sand deficit (~495,000 cy) in the profile compared with a normal healthy beach which is why the dry beach is narrow in summer and some dune sections erode each year - Quality Borrow Sand is Located ~1 mile offshore in ~50 ft depths - Approx 1.1 million cubic yards (+/- 15%) are required to restore the 2.7 mile beach and maintain a healthy beach for over 10 years - It is feasible to complete projects of this type in ~2 months using ocean-going hopper dredges or (possibly) traditional pipeline dredges - Upon completion of the project, the beach is expected to be indistinguishable from a natural beach, but average about 75 ft wider and offer more protection to property.
- 6. Recommended Plan Bridgehampton-Water MillBeach – 3.0 miles “Beach Nourishment Longevity Is Proportional to the Square of the Project Length” “Double the Length and You Quadruple the Design Life” “Sand Moves East and West According to Wind and Wave Direction. But On Average More Sand Moves West Over Time” 7,875 ft7,751 ft Quogue Beach – 2.7 miles Reach 1 Reach 2 Reach 3 Net Sand Movement Net Sand Movement 1,100,000 cubic yards* $14.1 million *Middle range +15%
- 7. Potential Borrow Area– Requires Confirmation Example 8 ft Boring Log ~700 Acres Minimum Boring Density Standard: 1 per 20 Acres
- 8. Liberty Island First Load– 8:20 pm, 24 May 2011 Other Projects: Nags Head NC
- 9. Nags Head Pier‒ Reach 1 23 Feb 2011 2 Sept 2011 21 Nov 201112 Jun 2012 STA525
- 10. Nags Head NC– Accounting of Nourishment Volumes
- 11. Unit Volume Changes(CY/FT) Relative To Nov-2010 Date of Survey Toe of Dune To +6 FT +6 FT To 0 FT 0 FT To -2 FT -2 FT To -6 FT -6 FT To -12 FT Nov-11 6 23 8 16 31 Jun-12 7 16 6 14 29 Outer Bar Movement
- 12. Before Nourishment (Nov2010 ) ~10 Months After Nourishment (Jun 2012) 170 ft Toe of Dune to MLW = 315 ft Station 785+00 Jennett’s Pier ‒ Reach 1
- 13. Unit Volume Changes(CY/FT) Relative To Nov-2010 Date of Survey Toe of Dune to +6 FT +6 FT To 0 FT 0 FT To -2 FT -2 FT To -6 FT -6 FT To -12 FT -12 FT To -19 FT -19 FT To -24 FT Nov-11 11 47 14 4 30 -2 2 Jun-12 17 42 13 0 53 7 1
- 14. Phase 1- 6.8 miles - 1,735,000 cubic yards - Nov 2002 thru April 2003 Phase 2 - 5.8 miles - 1,850,000 cubic yards - January thru March 2003 Sponsors: Town of Pine Knoll Shores & Town of Indian Beach - Phase 1 Town of Emerald Isle - Phases 2 & 3 Bogue Banks Nourishment Project
- 15. Pine Knoll ShoresNorth Carolina Photos by PA McKee & TW Kana September 1999 June 2004 July 2012 Post-FLOYD 2 yrs Post-Nourishment Present July 2012 Sept 2005 Post-OPHELIA 5-yrs Post-OPHELIA Renourishment Initial Locally Funded Project FEMA Funded Renourishment
- 16. Myrtle Beach South Carolina 20011985 InitialLocally Funded Project – 1986 Post Hugo FEMA project – 1990 Federal “50-yr” Project – 1997; 2008