1 Texas Coastal Ocean Observation Network TCOON Professor Gary Jeffress, RPLS Director, Conrad Blucher Institute for Surveying and Science Division of.

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Presentation transcript:

1 Texas Coastal Ocean Observation Network TCOON Professor Gary Jeffress, RPLS Director, Conrad Blucher Institute for Surveying and Science Division of Nearshore Research Texas Spatial Reference Center

2 The Texas Coastal Ocean Observation Network (TCOON) Texas Coastline 590 kilometers

3 TCOON Sponsors: Texas General Land Office Asset Management Coastal Resources Permitting Oil spill response Texas Water Development Board Estuary circulation modeling Freshwater inflows US Army Corps of Engineers Ship channel and Intracoastal Waterway dredging Permitting Coastal construction Coastal protection and restoration

4 TCOON has many users

5 Biggest users: The Public

6 Subsidence/Sea Level Rise Trends in East Texas NGVD 29 NAVD 88 From NOAA Co-Ops

7 Sea level Datums Mean Sea Level Private State

8 New Model Tide Gauges for Texas Includes a GPS CORS Station Sabine Pass Entrance and Galveston North Jetty

9 What is Mean Sea Level? mean sea level (MSL) A tidal datum. The arithmetic mean of hourly heights observed over the National Tidal Datum Epoch (19 years) [Latest Official Epoch ] Shorter series are specified in the name; e.g., monthly mean sea level and yearly mean sea level. From: TIDAL DATUMS AND THEIR APPLICATIONS NOAA Special Publication NOS CO-OPS 1 Silver Spring, Maryland June 2000

Epoch at Galveston X Mean Sea Level X Now 19 years From NOAA Co-Ops Changes mainly due to subsidence

11 Trend in MSL at Galveston Pier 21 mm Above Published Mean Sea Level Plot of 5-year moving average MSL

12 MSL on NAVD 1988 Datum MSL=1.02ft NAVD88 MSL=0.83ft NAVD88 MSL=0.65ft NAVD88 MSL=0.50ft NAVD88

13 County Subsidence Concerns

14 Outcome from old elevation data Country Roads Estate Subdivision, LaBelle Texas, Hurricane Ike, 2008 Photo courtesy of Caroline Miller

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