Sea Grant projects improving flood-control, water quality in Houston area

Volunteers and staff from the Texas Coastal Watershed Program(TCWP) and Clear Lake City’s Exploration Green Conservancyraced an oncoming storm earlier this summer and saw first-hand the effectiveness of their work to help manage floodwaters and improve water quality in the Galveston Bay watershed.

TCWP, a partnership of the Texas Sea Grant College Program at Texas A&M University and the Texas A&M AgriLife Extension Service, is collaborating with the Clear Lake City Water Authority on the Exploration Green project.

Mary Carol Edwards, TCWP’s stormwater wetland program coordinator, is leading the effort to convert a golf course into a 200-acre green space dedicated to conservation, recreation and flood control.

When complete, the project will include about 40 acres of stormwater wetlands — wetlands that are installed in stormwater detention basins. The basins are designed for flood and sediment control, but the addition of wetland plants improves water quality and flood control and increases recreational opportunities and habitat for wildlife.

“Our drainage systems are set up to just send water downstream. However, when it is just as flooded downstream, the water simply spreads out into the area. Stormwater wetlands help to change this process by retaining water properly, purifying it, allowing it to be habitat enhancing, and then allowing it to go gradually downstream,” Edwards said.

“The Exploration Green project will naturally filter and clean the rainwater as it flows through the detention ponds and into Horsepen Bayou, Clear Lake and Galveston Bay.”

Wetlands clean water in a variety of ways — the plants directly filter sediments out of the water, while the biochemistry of the wetlands transforms pollutants into less harmful forms, and many pathogens are consumed by microbes or disinfected by solar radiation.

On a Saturday in late June, more than 20 volunteers joined TCWP and Exploration Green staff for a community wetland planting day to install the first half-acre of the stormwater wetlands. They were able to get about three-quarters of the area planted before a short, powerful, fast-moving storm hit.

As everyone took shelter, they were able to see the new design of the detention basins working as planned, as water rose only into the areas they had just planted.

TCWP’s stormwater wetlands projects rely heavily on volunteers for planting and maintenance. Doug Peterson, vice chair of the Exploration Green Conservancy, said that though these projects are funded, volunteers’ contributions speed up the process and allow more work to be done.

“Volunteers are essential to projects like turning a golf course into a new natural area that wasn’t here before,” he said. “It’s not always in the budget to pay for these to be done quickly, but volunteers like those who came out here to Clear Lake help to make that difference.”

Anna Armitage, who lives close to the planting site at Clear Lake, brought her son Zac Chan, age 6, to help out. Armitage is an associate professor in the Department of Marine Biology at Texas A&M University at Galveston, where she studies coastal and wetland community ecology.

She said stormwater wetlands like the one at Clear Lake are important not only for flood control, but also add recreational value and a unique opportunity for neighborhood residents to be close to nature.

“This will give our children a green area to explore and learn about the plants and animals that frequent the wetlands, right in their own backyard,” she said. “It makes my son and I feel great to help with a project that benefits our neighborhood, and I’ve enjoyed the sense of community as we work side-by-side with our neighbors. I hope others will join us here and in future phases of Exploration Green wetland planting.”

Read the full news release at Texas A&M Today.

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