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Increasing Sustainability of Residential Areas Using Rain Gardens to Improve Pollutant Capture, Biodiversity and Ecosystem Resilience

Author

Listed:
  • Jennifer Morash

    (Department of Horticulture, Auburn University, Auburn, AL 36849, USA)

  • Amy Wright

    (College of Agriculture, Auburn University, Auburn, AL 36849, USA)

  • Charlene LeBleu

    (Program of Landscape Architecture, Auburn University, Auburn, AL 36849, USA)

  • Amanda Meder

    (Department of Horticulture, Auburn University, Auburn, AL 36849, USA)

  • Raymond Kessler

    (Department of Horticulture, Auburn University, Auburn, AL 36849, USA)

  • Eve Brantley

    (Department of Crop Soil & Environmental Science, Auburn University, Auburn, AL 36849, USA)

  • Julie Howe

    (Department of Soil and Crop Sciences, Texas A&M University, College Station, TX 77843, USA)

Abstract

Rain gardens have become a widespread stormwater practice in the United States, and their use is poised to continue expanding as they are an aesthetically pleasing way to improve the quality of stormwater runoff. The terms rain garden and bioretention, are now often used interchangeably to denote a landscape area that treats stormwater runoff. Rain gardens are an effective, attractive, and sustainable stormwater management solution for residential areas and urban green spaces. They can restore the hydrologic function of urban landscapes and capture stormwater runoff pollutants, such as phosphorus (P), a main pollutant in urban cities and residential neighborhoods. Although design considerations such as size, substrate depth, substrate type, and stormwater holding time have been rigorously tested, little research has been conducted on the living portion of rain gardens. This paper reviews two studies—one that evaluated the effects of flooding and drought tolerance on the physiological responses of native plant species recommended for use in rain gardens, and another that evaluated P removal in monoculture and polyculture rain garden plantings. In the second study, plants and substrate were evaluated for their ability to retain P, a typical water pollutant. Although plant growth across species was sometimes lower when exposed to repeated flooding, plant visual quality was generally not compromised. Although plant selection was limited to species native to the southeastern U.S., some findings may be translated regardless of region. Plant tissue P was higher than either leachate or substrate, indicating the critical role plants play in P accumulation and removal. Additionally, polyculture plantings had the lowest leachate P, suggesting a polyculture planting may be more effective in preventing excess P from entering waterways from bioretention gardens. The findings included that, although monoculture plantings are common in bioretention gardens, polyculture plantings can improve biodiversity, ecosystem resilience, and rain garden functionality.

Suggested Citation

  • Jennifer Morash & Amy Wright & Charlene LeBleu & Amanda Meder & Raymond Kessler & Eve Brantley & Julie Howe, 2019. "Increasing Sustainability of Residential Areas Using Rain Gardens to Improve Pollutant Capture, Biodiversity and Ecosystem Resilience," Sustainability, MDPI, vol. 11(12), pages 1-18, June.
  • Handle: RePEc:gam:jsusta:v:11:y:2019:i:12:p:3269-:d:239488
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    References listed on IDEAS

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    1. Manasvini Thiagarajan & Galen Newman & Shannon Van Zandt, 2018. "The Projected Impact of a Neighborhood-Scaled Green-Infrastructure Retrofit," Sustainability, MDPI, vol. 10(10), pages 1-13, October.
    2. Suyeon Kim & Sang-Woo Lee & Jongwon Lee & Kyungjin An, 2018. "Exploring the Relationship between Prior Knowledge on Rain Gardens and Supports for Adopting Rain Gardens Using a Structural Equation Model," Sustainability, MDPI, vol. 10(5), pages 1-9, May.
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    Cited by:

    1. Pia Minixhofer & Rosemarie Stangl, 2021. "Green Infrastructures and the Consideration of Their Soil-Related Ecosystem Services in Urban Areas—A Systematic Literature Review," Sustainability, MDPI, vol. 13(6), pages 1-21, March.
    2. Qingchang He & Andras Reith, 2022. "(Re)Defining Restorative and Regenerative Urban Design and Their Relation to UNSDGs—A Systematic Review," Sustainability, MDPI, vol. 14(24), pages 1-29, December.
    3. Rina Nuryati & Lies Sulistyowati & Trisna Insan Noor & Iwan Setiawan, 2024. "Innovation for development of sustainable integrated plantation polyculture on dry land: Using Structural Equation Modelling," Agricultural Economics, Czech Academy of Agricultural Sciences, vol. 70(6), pages 291-308.
    4. Feiwu Chen & Qian Zhang & Sheming Chen & Yingwei Yuan, 2023. "Research on Operation Efficiency Prediction and Optimization of Biological Retention System Based on GA-BP Neural Network Model," Sustainability, MDPI, vol. 15(14), pages 1-16, July.

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