Most of us don’t put much thought into where water goes during rainstorms—until it floods. While stormwater drains are designed to collect water as it flows over roads and sidewalks, they have a limited capacity. Stormwater ponds are present to capture any overflow. These systems contain specialized equipment to filter and slowly release water, helping to prevent safety risks, property damage, erosion, and natural habitat loss associated with flash floods. However, like any waterbody, stormwater ponds must be regularly maintained and monitored for warning signs. Don’t wait until the next heavy storm to find out if your stormwater retention pond is at risk of flooding.
Here are several signs to watch for to determine if your stormwater retention pond is at risk of flooding:
Muck build-up
Bottom muck in retention ponds is one of the most common signs that flooding could occur. Stormwater runoff carries dirt, leaves, grass clippings, pet waste, and other debris into these systems. Over time, the organic materials will deteriorate and decompose, forming a layer of muck on the bottom that diminishes a pond’s depth and water-holding capacity. Likewise, this can lead to blockages that prevent the equipment from filtering and releasing water as designed.
An effective strategy to assess the level of build-up is bathymetric mapping. The advanced depth-sensing technology allows Aquatic Experts to create a three-dimensional model of the retention pond bottom, revealing potential equipment damage or areas with severe build-up. From there, necessary repairs can be made and build-up can be removed, either through precise “spot treatments” by a mechanical hydro-rake, or a large-scale dredging operation to restore the waterbody to its original holding capacity. For more manageable build-up, Aquatic Experts can apply beneficial biological bacteria to help “digest” the muck naturally.
Shoreline erosion
Erosion along pond banks or structural areas is another warning sign of flooding risks. Sediment loss often occurs due to weather and human activities around the perimeter like mowing or fishing. As the shoreline deteriorates, pipes and equipment that have been installed under the ground may become exposed and damaged. Restoring the stormwater retention pond’s shoreline stability is essential to help prevent flooding and limit potential safety risks.
Bioengineering techniques offer some of the most impactful and long-lasting results. During a restoration project, Aquatic Experts fill a patented knit mesh material with sediment, sand, or other organic matter. The material is then shaped to fit the desired slope and contour of the shoreline before being anchored in place for many years of stability. Sod and native plants can be planted directly into the mesh to help further contain shoreline sediment and lessen the impact of stormwater runoff as it flows into the pond.
Pond weeds and algae
Excessive pond weeds and algae may also point to potential flooding risks. Large infestations can clog inlet and outlet pipes, preventing water from flowing properly. Additionally, they often result in a disproportionate level of die-off and decomposition, accelerating muck development and volume loss.
Eco-friendly nutrient remediation products can be applied to help curb pond weeds and algae by “deactivating” the nutrients that fuel them. Steps should also be taken to help prevent unwanted nutrients from entering the waterbody. In addition to organic matter like animal waste, stormwater runoff picks up lawn and garden fertilizers, motor oil, and other materials containing nutrients. A healthy buffer of native plants can be cultivated around the perimeter to help filter nutrient-rich substances that are transported by stormwater runoff.
Flooding is scary, dangerous, and can result in damage to turfgrass and landscaping, homes, parking lots, and other infrastructure that may negatively impact property values. Luckily, most flooding can be prevented by implementing proactive solutions that preserve water depth and the integrity of vital stormwater equipment. With regular monitoring and maintenance by an experienced professional, stakeholders can rest assured that their stormwater retention ponds are prepared for the next big rainstorm.
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SOLitude Lake Management is a nationwide environmental firm committed to providing sustainable solutions that improve water quality, enhance beauty and preserve natural resources.
SOLitude’s team of aquatic scientists specializes in the development and execution of customized lake, stormwater pond, wetland and fisheries management programs. Services include water quality testing and restoration, algae and aquatic weed control, installation and maintenance of fountains and aeration systems, shoreline erosion control, muck and sediment removal and invasive species management. SOLitude partners with homeowners associations, golf courses, private landowners, businesses and municipalities. SOLitude Lake Management is part of Rentokil, a leading business services company, operating across the United States, Canada and Puerto Rico.
For more information, visit SOLitude Lake Management at solitudelakemanagement.com, and connect on Facebook, LinkedIn, Twitter, Instagram and YouTube.
