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Mitigating Flood Risks Through Engineering and Planning Solutions

Learn about flood management strategies such as dams, stormwater modeling, and floodplain mapping to reduce flooding impacts. Explore case studies and recommendations.

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Mitigating Flood Risks Through Engineering and Planning Solutions

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  1. Floodingadapted from a presentation by Prof.David R. Maidment

  2. Flooding Manawatu, New Zealand http://www.ourregion.co.nz/home.php

  3. Bridges that Work http://www.ourregion.co.nz/home.php

  4. Bridges that don’t work Small bridge on a country road is washed away http://www.ourregion.co.nz/home.php

  5. http://www.tsarp.com/ Most costly urban flood disaster in the history of the United States

  6. Major Highways during Tropical Storm Allison I-10 West I-45 South http://www.chron.com/content/chronicle/special/01/flood/

  7. Kayaking on US 59, Houston(Tropical Storm Allison) http://www.chron.com/content/chronicle/special/01/flood/

  8. Residential Flooding in Tropical Storm Allison http://www.chron.com/content/chronicle/special/01/flood/

  9. The Human Cost Saving the wedding photos Cleaning out the car http://www.chron.com/content/chronicle/special/01/flood/

  10. 5-day rain total (Tropical Storm Allison) City of Houston Harris County

  11. 12-hour rain total(Tropical Storm Allison)

  12. Extreme Rainfall Statistics(Tropical Storm Allison)

  13. 73,000 houses and apartment buildings flooded

  14. Watersheds Stream gaging station Watershed = area that drains to a particular river or stream network

  15. Floodplain maps(White Oak Bayou, Houston)

  16. What can we do about floods? • Engineering structures • Dams and detention ponds to hold back flood waters • Increase capacity of streams to carry floods • Better flood planning • Create floodplain maps to define at-risk areas • Restrict building foundations are at least 1 foot above 100-year flood elevation • Develop flood forecasting and warning systems

  17. Regional Storm Water Modeling Program and Master Plan for San Antonio City of San Antonio

  18. San Antonio Regional Watershed Modeling System Geospatial Data: City, County SARA, other “Bring the models together” Modeling System Rainfall Data: Rain gages Nexrad Calibration Data: Flows Water Quality Floodplain Management Capital Improvement Planning Water quality planning Integrated Regional Water Resources planning Flood Forecasting

  19. FLOODPLAIN MAP Nexrad Map to Flood Map in Arc 9 Model Builder Flood map as output Model for flood flow HMS Model for flood depth Nexrad rainfall map as input

  20. TxDOT Sand Filter

  21. Central Park Wet Pond (Austin)

  22. Extended Detention Basin

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