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RISCFD Model of PM Sedimentation and Resuspension in Urban Water Clarification
Publisher: ASCE
Abstract: Unit operations (UO) for urban water clarification are commonly implemented for management of particulate matter (PM), PM-associated chemicals, and microbial species, primarily through sedimentation. In this study, an ...
Partitioning and First-Flush of Nitrogen in Rainfall-Runoff from an Urban Source Area
Publisher: American Society of Civil Engineers
Abstract: The urban surface is a largely impervious interface across which nitrogen (N) in runoff is transported and partitions between dissolved and particulate phases. In this study intraevent partitioning and transport are examined ...
Hydrologic Transport of Thermal Energy from Pavement
Publisher: American Society of Civil Engineers
Abstract: Heat island impacts generated from the built (urban) environs have been recognized for decades as a component of climate change. Increasing imperviousness of the urban environments generates a demonstrable impact on ...
Phosphorus Equilibrium. I: Impact of AlOx Media Substrates and Aqueous Matrices
Publisher: American Society of Civil Engineers
Abstract: For urban drainage, the role of granular media has expanded from particulate matter (PM) filtration to media also engineered for phosphorus (P) mass transfer. In this paper, equilibrium between P as total dissolved P (TDP) ...
Phosphorus Equilibrium. II: Comparing Filter Media, Models, and Leaching
Publisher: American Society of Civil Engineers
Abstract: Part I focused on a Freundlich model of phosphorus (P) equilibrium between AlOx-media substrates and differing aqueous matrices: runoff, wastewater, and a reproducible deionized (DI) surrogate. In contrast, Part II examines ...
Perspective on the Synthesis of Unit Operations and Process (UOP) Concepts with Hydrologic Controls for Rainfall-Runoff
Publisher: American Society of Civil Engineers
Gravitational Settling Velocity Regimes for Heterodisperse Urban Drainage Particulate Matter
Publisher: American Society of Civil Engineers
Abstract: Gravitational settling regimes, most commonly discrete (Type I) or flocculent (Type II) can be hindered (Type III) in unmaintained urban drainage appurtenances. In coastal zones or in areas with deicing salt applications, ...
Modeling Annual Particulate Matter Separation and Washout by Unit Operations with CFD
Publisher: ASCE
Abstract: Computational fluid dynamics (CFD) is a tool to simulate the coupled hydrodynamics and particulate matter (PM) fate in unit operations (UOs) subject to transient rainfall-runoff events. Most frequently, CFD is applied for ...
CFD as a Complementary Tool to Benchmark Physical Testing of PM Separation by Unit Operations
Publisher: ASCE
Abstract: Unit operation (UO) systems have proliferated to sequester urban drainage particulate matter (PM) and PM-bound constituents. PM has been a primary focus of testing and certification. A nominal class of UOs, hydrodynamic ...
In Situ Volumetric Filtration Physical Model to Separate Particulate Matter from Stormwater
Publisher: American Society of Civil Engineers
Abstract: In the last several decades there has been a proliferation of structural best management practices (BMPs) for particulate matter (PM) sequestration. However, effective separation and continued retention of PM without washout ...