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Showing 1 to 20 of 46 for “"Bioretention"”.
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Denitrification in a best management practice bioretention system
… occurrence of denitrifying soil bacteria in a bioretention system located in Singapore and containing a saturated anoxic zone intended to facilitate denitrification. Soil samples were collected from six depths within the rain garden, four of which were within the saturated anoxic zone. These …
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Bioretention Hydrologic Performance in an Urban Stormwater Network
… studies have evaluated the hydrologic effects of bioretention at the site level, few have investigated the role bioretention plays when distributed throughout a watershed. This study aims to assess bioretention's effects on an urbanized watershed using two modeled scenarios: one where runoff from …
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Sorption and release of dissolved pollutants via bioretention media.
… One such treatment practice is called bioretention, or rain gardens. This thesis discusses the use of bioretention media as a treatment technique for the removal of toxic metals and investigates the release of phosphorus. A review of previous research and the laboratory experiments will …
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A Mesocosm Study of Bioretention Functionality Under Frozen Conditions
… and introduce contaminants to stormwater. Bioretention is a green stormwater management strategy designed to restore natural hydrologic conditions in urban areas by promoting infiltration and removing contaminants at the source. Bioretention technology has proven to be effective in warm …
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Nitrogen chemistry in an urban bioretention system in Singapore
An investigation into the nitrogen chemistry of the anoxic layer of an urban constructed wetland in Singapore was conducted. This pilot-scale wetland treats stormwater runoff from the Balam Estate housing development for several water quality parameters of concern, including nitrate. Earlier …
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Changes in Stormwater Thermal Loads Due to Bioretention Cells
… event, resulting in higher runoff temperatures. Bioretention cells are a common stormwater control practice identified as a possible thermal mitigation practice in urban watersheds harboring cold-water fish species. However, design specifications vary by locality and few studies have explored how …
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Characterization and Removal Efficiency Comparison of Bioretention Soil Media Mixtures
<p>Bioretention cells have become a commonly used green infrastructure technique to help infiltrate and remove contaminants from stormwater runoff. Bioretention cells are constructed from a layered or heterogeneous soil mixture designed to optimize their ability to infiltrate influent stormwater …
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Infiltration Models for Engineered Media in Living Roofs and Bioretention
Engineered media used in living roofs and bioretention plays a crucial role in determining stormwater treatment performance and sustaining plant growth. This research focuses on (1) the hydraulic properties and pore size distributions of engineered media with varying aggregates, compost ratios, and …
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Thermal Pollution Mitigation in Cold Water Stream Watersheds Using Bioretention
This study examines the use of bioretention as a strategy to reduce the thermal impact associated with urban stormwater runoff in developing cold water stream watersheds. Temperature and flow data were collected during ten controlled trials at a bioretention facility located in Blacksburg, …
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Development of a Design-Based Computational Model of Bioretention Systems
… and water quality of urban watersheds is bioretention (also known as a rain garden). Despite its wide applicability, an understanding of its multiple physiochemical and biological treatment processes remains an active research area. To provide a wide ability to evaluate the hydrologic …
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The Effects of Vegetation on Ecosystem Services Provisioning by Stormwater Bioretention
… chap- ter reviews key topics like stormwater bioretention, ecosystem services provisioning, and vegetative characteristics (e.g., plant adaptive strategy), and provides a roadmap for my dissertation. The second chapter investigates whether current plant selection practices for stormwater …
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Impacts of biota on bioretention cell function during establishment in the Midwest
… region-specific effects of biota on function of bioretention cells, a lysimeter study was conducted at Kansas State University to determine how earthworms and native Kansas grasses impact runoff treatment and hydraulic function of a bioretention cell. This study also employed the Comprehensive …
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Modeling Watershed-Wide Bioretention Stormwater Retrofits to Achieve Thermal Pollution Mitigation Goals
… several best management practices, including bioretention filters, have been able to reduce thermal pollution, success has been limited. The extent of thermal mitigation required to prevent ecological damage is unknown. A calibrated runoff temperature model of a case study watershed in …
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Using Bioretention Retrofits to Achieve the Goals of Virginia's New Stormwater Management Regulations
… channel erosion. This study models different bioretention cell sizes in a developed watershed in Blacksburg, Virginia to determine the "performance" at both the sub-watershed and watershed levels. In addition, models of "optimal" bioretention cells sized to meet the RRM for each sub-watershed …
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Water quality and hydrological assessment and modeling of bioretention basins in tropical cities
The bioretention basin is a form of stormwater best management practice that originated in temperate regions and is becoming increasingly popular in tropical regions. Nevertheless, it is a poorly evaluated system in the tropics due to the limited availability of long-term, high-resolution …
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Analysis of an Urban Stormwater Bioretention Management Practice in Prince William County, Virginia
The performance of an urban stormwater bioretention management practice in the Kingsbrooke Subdivision of Prince William County, Virginia was examined over a one-year period. Bioretention is a relatively new urban stormwater best management practice (BMP) intended to mimic the pollutant-removal …
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Evaluation of flow models and pollutant retention isotherms for their application to rain garden bioretention
The primary aims of this research was firstly to develop a computer modelling tool which could predict pollution retention in a rain garden and secondly to use the model and additional experiments to examine various aspects of rain garden design with respect to pollutant retention. Initially, the …
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Evaluating Vegetation, Root, and Media Characteristics of a Bioretention Installation and their Influence on Stormwater Retention
Bioretention manages stormwater through ecological processes which rely on complex interactions between vegetation, root dynamics, and growing media properties. Parameters of three growing media and three vegetation palates in a mature bioretention research facility were investigated in an arid, …
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Urban Stormwater Management: Treatment of Heavy Metals and Polycyclic Aromatic Hydrocarbons with Bioretention and Permeable Pavement Technologies
… the effectiveness of two LID technologies, bioretention and permeable pavements in treating PAHs and common urban runoff metals such as lead, copper and zinc. Select case studies are used to synthesize data collected in the field and in the laboratory. Both technologies appear to be …
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Strengths and limitations of bioretention sorbent amendments to simultaneously remove metals, PAHs, and nutrients from urban stormwater runoff
Bioretention is increasingly being employed as a stormwater management tool in urban areas, with the intent of using infiltration to address both water quantity and quality concerns. However, bioretention soil media (BSM) has limited removal capacity for dissolved contaminants; hence, amendments …
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