1. USGS Analysis of Storm-Tide Impacts from Hurricane Sandy, and Plans during Future Coastal Storms Chris Schubert, USGS 2014 Long Island-NYC Emergency Management Conference

2.  What’s new in the past year?  Comparisons of Sandy’s peaks to historical storms and annual exceedance probabilities (recurrence intervals)  Assessments of storm-surge magnitude and timing  Comparisons of inundation maps derived from differing amounts of available data  Where is USGS headed on coastal storms?  Storm, Wave, and Tide Hydrodynamics (SWaTH) Network USGS workshop outline

3. Storm surge versus storm tide http://www.nhc.noaa.gov/surge/

4. Sandy—by the numbers  Largest-sized storm to hit U.S.  Second costliest storm in U.S. history  253 lives lost overall; 77 in NY, NJ & CT  About 2/3 of 77 deaths due to surge

8. Permanent and temporary monitoring sites and high-water-mark sites that documented the storm tide of Hurricane Sandy

10.  The analysis of storm-tide impacts focused on 1)comparisons of peak storm-tide elevations to those from historical storms and to annual exceedance probabilities; 2)assessments of storm-surge magnitude and timing; and 3)comparisons of inundation maps derived from differing amounts of available sensor and HWM data. The need for an interpretive report to assist FEMA and other stakeholders in future flood-damage analysis and flood mitigation prompted the current analysis of Hurricane Sandy under this mission assignment.

11. Peak storm-tide elevations produced by Hurricane Sandy

13. Differences in feet between peak storm-tide elevations produced by Hurricane Sandy and the storm of December 11-13, 1992

14. Differences in percent between peak storm-tide elevations produced by Hurricane Sandy and the storm of December 11-13, 1992

15. Differences in feet between peak storm-tide elevations produced by Hurricane Sandy and Tropical Storm Irene

16. Differences in percent between peak storm-tide elevations produced by Hurricane Sandy and Tropical Storm Irene

17. Select annual exceedance probabilities for peak storm-tide elevations produced by Hurricane Sandy

19. Storm-surge magnitude associated with the peak storm tide produced by Hurricane Sandy

20. Magnitude of the peak storm surge produced by Hurricane Sandy

21. Timing of the peak storm surge produced by Hurricane Sandy

22. Extents of storm-tide inundation from Hurricane Sandy derived from differing amounts of USGS storm-tide data—10/31/12 NHC SLOSH model hindcast product

23. Extents of storm-tide inundation from Hurricane Sandy derived from differing amounts of USGS storm-tide data—11/11/12 FEMA interim high‐resolution product

24. Extents of storm-tide inundation from Hurricane Sandy derived from differing amounts of USGS storm-tide data—2/14/13 FEMA final high‐resolution product

25. HAZUS estimates of total building stock losses due to storm-tide inundation from Hurricane Sandy for 10/31/12 NHC SLOSH model hindcast product

26. HAZUS estimates of total building stock losses due to storm-tide inundation from Hurricane Sandy for 11/11/12 FEMA interim high‐resolution product

27. HAZUS estimates of total building stock losses due to storm-tide inundation from Hurricane Sandy for 2/14/13 FEMA final high‐resolution product

32.  The SWaTH network expands upon the USGS storm-tide program started after Hurricane Katrina.  Network developed for Northeast Coast from Virginia to Maine.  Expanded to include deployment for major Nor’easters, in addition to tropical systems.  Provides a foundation for integrated science and decision support.  Will be used as a template for the remainder of the Nation’s coastline. Surge, Wave, and Tide Hydrodynamics (SWaTH) Network

33.  Network developed with input from Federal, State and local partners, emergency managers, and coastal researchers and modelers.  Includes both long-term and temporary stations operated by the USGS and other partners.  Provide key data for enhanced mapping of inundation, contamination, and erosion vulnerability.  Provide baseline data for assessing coastal ecosystem change and adaptive management planning. Surge, Wave, and Tide Hydrodynamics (SWaTH) Network

34. Entire proposed network consists of about 1,000 sites:  76 non-USGS stations,  162 coastal stations/tidal streams,  60 rapid-deployment gages,  384 temporary storm-tide sensors,  217 temporary wave sensors,  102 temporary barometric-pressure sensors. Not all stations will be fitted with sensors for any one storm. Data distributed through an online mapper in near-real time or as data is collected. Surge, Wave, and Tide Hydrodynamics (SWaTH) Network

35.  Long Term (blue points): station such as a continuous-record coastal- monitoring station or tidal streamgage.  Temporary (red points): storm-deployed gage such as an RDG, or storm-tide, wave-height, or barometric-pressure sensor. Surge, Wave, and Tide Hydrodynamics (SWaTH) Network

36.  Distributed (blue points): stations spaced geographically to facilitate monitoring on a regional scale or for high-priority sites.  Transect (orange points): stations included as part of a wetlands or urban transect (e.g. from open coast to back bays to inland). Surge, Wave, and Tide Hydrodynamics (SWaTH) Network

37. The proposed timeline for deploying the temporary sensor brackets and RPs is as follows:  Complete all existing locations (those deployed for Sandy and Irene) by June 15, 2014;  Complete 80% of the entire network by August 1, 2014;  Complete 100% of the network by September 30, 2014. Deployment Schedule

38. For more information, contact: Chris Schubert schubert@usgs.gov schubert@usgs.gov Ron Busciolano rjbuscio@usgs.gov rjbuscio@usgs.gov U.S. Geological Survey N.Y. Water Science Center (631) 736-0783, -4283 fax http://ny.water.usgs.gov http://ny.water.usgs.gov