As Greater Houston Seeks Protection from the Next Hurricane Harvey, Using Natural Features Like Prairies and Sand Dunes to Control Water Is Gaining Purchase
By Tom Dart, CityLab
June 4, 2019
HOUSTON— With the 2019 Atlantic hurricane season under way as of June 1, Texas has taken a major step toward improving its flood defenses by passing a bill to tap into the state’s savings—the aptly nicknamed Rainy Day Fund—for a sum of $1.7 billion. The move comes almost two years after Hurricane Harvey deluged Texas in August 2017, killing 68 people and causing an estimated $125 billion in damage statewide.
A chance to push for green infrastructure
With its loyal support for the oil and gas industry, it’s not often that the Texas legislature gives conservationists anything to cheer. But the text of Bill 7 cites “construction and implementation of nonstructural projects, including projects that use nature-based features to protect, mitigate or reduce flood risk.” Environmental advocates see a chance to push for green designs in a state better known for exploiting natural resources than preserving them.
Lawmakers still envision a significant role for traditional “gray” engineered solutions, such as pipes, levees, drainage channels, and retention basins. But Laura Huffman, state director for The Nature Conservancy, thinks politicians are “recognizing that green infrastructure can scale just like gray infrastructure,” she said.
“Engineering companies want to do the most expensive thing they can do,” complained Susan Chadwick, executive director of Save Buffalo Bayou, a local advocacy group. Her group argues that chopping down trees and vegetation reduces the land’s stability and potential to absorb water and capture pollution; adds to repair and maintenance costs; and has a negative impact on residents’ wellbeing.
The detention project feels like a compromise between natural and artificial flood-control techniques. “After Harvey, they needed to bring some stuff off the shelf and show they are ready to do something,” Chadwick said. She is skeptical that a city that used concrete to conquer swamps, marshes, and prairies can learn to restore green spaces—or just leave them alone.
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