Center Phase III: Developing a Houston- Galveston Area Protection System (H-GAPS) The Center 6100 Main St., MS317 Houston, Texas 77005
June 2, 2014 DPCAC meeting Center Phase I & II Recap (2009-2014) Phase III Scope of Work (2014-2016) H-GAPS Initial Concepts/Strategies
The Center The Severe Storm Prediction, Education, and Evacuation from Disasters () Center (est. 2007) Mission To be recognized as the Gulf Coast s top university-based center for research and education in the prediction, analysis and impacts of severe storms.
The Center The Center is based at Rice University and collaborates with leading academic institutions, the private sector and public entities. Key Researchers Dr. John Anderson Rice University - Coastal Geology Dr. Philip Bedient Rice University - Urban Flood Analysis Mr. Jim Blackburn Rice University - Environmental Impact Dr. Sam Brody Texas A&M University - Land Planning and Risk Mr. Joe Cibor Cibor, Inc. - Geotechnical Engineering Mr. Tom Colbert University of Houston - Land Planning Dr. Clint Dawson University of Texas - Storm Surge Modeling Dr. Jamie Padgett Rice University - Bay Area Infrastructure Mr. Charles Penland Walter P Moore - Civil Engineering Dr. Hanadi Rifai University of Houston - Industrial/environmental impact (HSC) Dr. Ron Sass Rice University - Wetlands and Carbon Cycling
Phase I and II Recap (2009-2014)
LONE STAR COASTAL AREAS Existing Conditions + Green Options Lone Star Coastal National Recreation Area (LSCNRA) Lone Star Coastal Exchange (LSCE)
CENTENNIAL GATE LOCATIONS
CENTENNIAL GATE LOCATIONS
Conceptual Gate Designs
Modeling Ike Surge Water Levels Varying landfall points (p0 and p7) Varying wind speeds (Ike, +15%, +30%) Ike, OL Ike+15%, OL Ike, NL Ike+15%, NL Ike+30%, OL Ike+30%, NL
Industrial Damage Database Ike+15%, p7
Infrastructure Risk Database Ike+30%, p7
Residential Damage Database Galveston County, Category 3 Hurricane Low Damage Estimate High Damage Estimate Bayou Vista $50.5 M $72.3 M Clear Lake Shores $31.5 M $44.6 M Dickinson $89.5 M $135 M Friendswood $9.2 M $12.4 M Galveston $725 M $1035 M Hitchcock $61.8 M $89.2 M Jamaica Beach $74.4 M $106 M Kemah $36.7 M $50.5 M La Marque $74.9 M $111 M League City $449 M $655 M Santa Fe $3.5 M $5.3 M Texas City $89.2 M $136 M Tiki Island $80.5 M $115 M Unincorporated $395 M $565 M County Total $2,170 M $3,132 M Ike+15%, p7
Report by TU Delft (2013) Report Galveston Bay: Bolivar Roads Flood Risk Reduction Barrier (July 2013) Objective: provide suitable solutions for surge barrier in Bolivar Roads as part of the Ike Dike system and provide recommendations for further research Recommendation: investigate other options to increase the flood protection level, such as compartmenting Galveston Bay to reduce wind set up and other alignments of a flood protection system. Eventually, it is important to compare various alternatives (incl. donothing, Ike Dike and other alternatives).
Phase III: Scope of Work Storm Surge Protection for the Houston-Galveston Area (2014-2016) THREE priority initiatives: 1. Analysis of Concepts/Strategies for Surge Damage Reduction - Identify existing damages/risk associated with hurricane storm surge - Generate and analyze storm surge damage reduction strategies, including structural and non-structural options (e.g. Centennial Gate, Ike Dike and LSCE) - Recommend surge damage reduction strategy for Galveston Bay area (H-GAPS) 2. Lone Star Coastal National Recreation Area and Ecosystems Services Exchange - Support pursuit of congressional legislation for creating LSCNRA - Evaluation and quantification of ecosystem services in the Galveston Bay region 3. Federal Flood Insurance Policy Study - Evaluation of Biggert-Waters Act (2012), other federal flood policies, and current development policies/criteria, under existing and future floodplain mapping and land use conditions
Phase III: Scope of Work Storm Surge Protection for the Houston-Galveston Area (2014-2016) THREE priority initiatives: 1. Analysis of Concepts/Strategies for Surge Damage Reduction - Identify existing damages/risk associated with hurricane storm surge - Generate and analyze storm surge damage reduction strategies, including structural and non-structural options (e.g. Centennial Gate, Ike Dike and LSCE) - Recommend surge damage reduction strategy for Galveston Bay area (H-GAPS) 2. Lone Star Coastal National Recreation Area and Ecosystems Services Exchange - Support pursuit of congressional legislation for creating LSCNRA - Evaluate/quantify ecosystem services in the Galveston Bay region (LSCE) 3. Federal Flood Insurance Policy Study - Evaluation of Biggert-Waters Act (2012), other federal flood policies, and current development policies/criteria, under existing and future floodplain mapping and land use conditions
Phase III: Scope of Work Storm Surge Protection for the Houston-Galveston Area (2014-2016) THREE priority initiatives: 1. Analysis of Concepts/Strategies for Surge Damage Reduction - Identify existing damages/risk associated with hurricane storm surge - Generate and analyze storm surge damage reduction strategies, including structural and non-structural options (e.g. Centennial Gate, Ike Dike and LSCE) - Recommend surge damage reduction strategy for Galveston Bay area (H-GAPS) 2. Lone Star Coastal National Recreation Area and Ecosystems Services Exchange - Support pursuit of congressional legislation for creating LSCNRA - Evaluate/quantify ecosystem services in the Galveston Bay region (LSCE) 3. Federal Flood Insurance Policy Study - Evaluate Biggert-Waters Act (2012), other federal flood policies, and current development policies/criteria, under existing (and future) floodplain mapping and land use conditions
H-GAPS Project Work Flow Coastal Modeling P. Bedient C. Dawson N. Fang J. Anderson Analysis of Storm Surge Reduction Concepts/Strategies Analysis of Existing Conditions of Storm Surge J. Cibor C. Penland J. Blackburn R. Sass T. Colbert Conceptual Design/ Impacts Assessment (Cost Estimate) Analysis of Damage/Risk Reduction (Benefits Estimate) Analysis of Damage/Risk (Damages Estimate) P. Bedient H. Rifai J. Padgett Benefit/Cost Ratio of Strategies Cost of doing nothing Peer Review Organizations TAMUG TU Delft USACE Galveston District Texas GLO 6-County Surge District H-GAPS Recommendation
H-GAPS Study Area Boundaries
USACE 1979 Concepts/Strategies Alternatives Examined Coastal Barrier Plan Mid-Barrier Plan Bayshore Barrier Plan Resulting Plan City of Galveston levee West Bayshore levee (LaPorte to Texas City)
Initial Concepts/Strategies
H-GAPS Questions?
The Ike Dike strategy is to keep the ocean surge out of Galveston Bay by using a gated coastal barrier Houston Ship Channel High Island Bolivar Roads Existing Seawall Intracoastal Waterway Coastal Spine San Luis Pass
Current FHAs - HSC BFE 14 BFE 15 BFE 19
Preliminary FHAs - HSC BFE 20 BFE 19 BFE 20 BFE 19 BFE 20 BFE 17 BFE 19 BFE 19 BFE 20 BFE 18 BFE 19