Mariana Leckner, Ph.D., Professor, American Military University Thomas O. Herrington, Ph.D. Associate Professor, Stevens Institute of Technology

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1 Mariana Leckner, Ph.D., Professor, American Military University Thomas O. Herrington, Ph.D. Associate Professor, Stevens Institute of Technology National Hydrologic Warning Council Training Conference and Exposition San Diego, CA May 11, 2011

2 Shrewsbury River, New Jersey John Frederick Kensett, 1859

3 Introduction: An Independent System Flood warning system for the Shrewsbury and Navesink Rivers communities /county Repetitive loss communities Built-out communities Tidal and inland flooding Others in NJ: Passaic Basin, Somerset County, Burlington County, CMN Gauge locations, SRFWS (not to scale): Source:

4 Location Map: FWS in NJ

5 Introduction: An Independent System Decreasing Federal and state budgets/systems StormReady Oceanport was the catalyst Pooled resources for Planning Funding O&M Research Mitigation Shrewsbury River at Route 36 (Photo: M. Leckner)

6 System Stakeholders Monmouth County OEM Municipalities Highlands Little Silver Long Branch Middletown Monmouth Beach Oceanport Rumson Sea Bright Coastal Monmouth County 1992 (Photo: M. Leckner)

7 System Partners Academic Partners Monmouth University Stevens Institute of Technology and the rest Private Sector Leckner Consulting, LLC Jonach Electronics Invited Agencies NJOEM NWS NJ State Climatologist (NJ WxNet) USGS Coastal Monmouth County 1992 (Photo: M. Leckner)

8 Flood Hazard Summary Nor easter Inland Rainfall Tidal Tropical Systems Category 1 Hurricane Storm Surge Map, SRFWS Communities. Source: MCOEM

9 Sandy Hook Water Level Trends

10 Historical Flood Heights/Categories Flood category Height (feet) * Location Minor flooding Sea Bright, Monmouth Beach, Long Branch, Rumson, Highlands Moderate Flooding Little Silver, Oceanport, Sandy Hook 96, 98, 00, 10 March 2010 flooding Major Flooding > 5.9 Sandy Hook, region 91, 92, 93 *NAVD88

11 System Summary Purpose Monitoring Alert Data collection Warning (goal) Gooseneck Bridge gauge. Photo: Capt. M. Baldanza

12 System Summary County/State Bridges Weather Stations with Tide Monmouth County Gooseneck Bridge Monmouth County Rumson-Sea Bright Bridge Monmouth County Oceanic Bridge Remote Tide Station State Highway 36 Bridge - Highlands Monmouth County Patten Ave Bridge Photo: Monmouth County PIO

13 System Specifications Installed in 2010 Five gauges High Sierra Electronics Model 3206 Self-contained, battery-powered Radar sensors to measure water levels (NAVD88) Regular maintenance NWS frequency

14 System Specifications Receiver/Decoder Monmouth University, Urban Coast Institute Website Stevens Institute of Technology, The Center for Maritime Systems System Management Monmouth County OEM Operations All stakeholders

15 Gauge locations, SRFWS (not to scale). Source:

16 Datum Selection: NAVD88 The case for MLLW NWS Socioeconomic usage The case for NAVD88 National Flood Insurance Program Maps GIS work About 2.8 feet above MLLW at Sandy Hook, about 2.2 at Sea Bright Why the controversy? Communication with the public

17 Nearest gauges NOS Sandy Hook USGS Sea Bright Route 36 Bridge, Highlands, NJ (Photo: M. Leckner)

18 Sandy Hook Datum Elevations View of Sandy Hook, NJ (Photo: M. Leckner) Source: Sandy Hook, NJ&type=Datums

19 USGS Gauge at Sea Bright Sea Bright, 3.3 miles south of Sandy Hook Bay Datum NAVD 1988 MLLW is feet Max on record: 4.75 feet (April 2007) Maximum estimated (1992): around 7.3 feet

20 Website

21 Website: Time-Series Interface

22 Website: Time-Series Interface

23 Gooseneck Bridge, April 16, 2011 By 9:45 PM approximately 4.1 feet of water (NAVD88) for selected locations in Oceanport, NJ (cool maps, no permissions!) Moderate flooding.

24 Current Issue: How high s the water? Benchmark for alerts and warnings System operation: 1 year complete NOAA tide station guidelines 19 years ( primary ) 1 year ( secondary ) less than 1 year ( tertiary ) Pressure to provide water levels: still water, MLLW, MHHW Alerts Warnings Value-added product

25 Determining Water Levels Preliminary data in progress (Stevens Institute of Technology, Monmouth University) Year 1 data preliminary Reporting sheets Critical juncture for the project

26 Key to progress: Collaboration Communities and County OEM/PD Public works Academic Research Partners Website Data Research

27 Summary System is functioning well Website is effective Needs: Preliminary water level calculations Regular community reporting Flood stage determinations Funding (Base Maps) Community Product: Identification of water levels for emergency management decision-making

28 Thank you! Comments &Questions? Mariana Leckner, Ph.D. Professor, American Military University Thomas O. Herrington Associate Professor, Stevens Institute of Technology