Stormwater Runoff Treatment Articles on Environmental XPRT

EVALUATION OF POTENTIAL MOLECULAR MARKERS FOR URBAN STORMWATER RUNOFF

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Oct. 1, 2001

By Southern California Coastal Water Research Project Authority (SCCWRP)

Comparison of the treatment performance of hybrid constructed wetlands treating stormwater runoff

This study was conducted to compare the treatment performance of two hybrid constructed wetlands (CWs) in treating stormwater runoff. The hybrid CWs were composed of a combination of free water surface (FWS) and horizontal subsurface flow (HSSF) CWs. Based on the results, strong correlation exists between potential runoff impacts and stormwater characteristics; however, the low correlations ...

Aug. 26, 2015

By IWA Publishing

Inflow based investigations on the efficiency of a lamella particle separator for the treatment of stormwater runoffs

The present design of stormwater tanks is based on the creation of storage volume to retain stormwater and the prevention or reduction of stormwater overflows. The treatment of stormwater is often improved with mechanical equipment. The general layout rules do usually not include the appropriate choice of design inflow related to the chosen treatment equipment. In the following investigations it ...

Jan. 1, 2011

By IWA Publishing

Understanding the factors influencing the removal of heavy metals in urban stormwater runoff

In this research, an infiltration trench equipped with an extensive pretreatment and filter bed consisting of woodchip, sand and gravel was utilized as a low impact development technique to manage stormwater runoff from a highly impervious road with particular emphasis on heavy metal removal. Findings revealed that the major factors influencing the removal of heavy metals were the ...

Mar. 21, 2016

By IWA Publishing

Performance of a pilot-scale constructed wetland for stormwater runoff and domestic sewage treatment on the banks of a polluted urban river

To examine the performance of a constructed wetland system on stormwater runoff and domestic sewage (SRS) treatment in central east China, two parallel pilot-scale integrated constructed wetland (ICW) systems were operated for one year. Each ICW consisted of a down-flow bed, an up-flow bed and a horizontal subsurface flow bed. The average removal rates of chemical oxygen demand (CODCr), total ...

Apr. 10, 2014

By IWA Publishing

Evaluation of undersized bioretention stormwater control measures for treatment of highway bridge deck runoff

Two grassed bioretention cells were constructed in the easement of a bridge deck in Knightdale, North Carolina, USA, in October, 2009. One was intentionally undersized (‘small’), while the other was full sized (‘large’) per current North Carolina standards. The large and small cells captured runoff from the 25- and 8-mm events, respectively. Both bioretention cells employed average fill media ...

Jan. 1, 2011

By IWA Publishing

Physical design optimization of an urban runoff treatment system using Stormwater Management Model (SWMM)

The study presented the application of Stormwater Management Model (SWMM) in determining the optimal physical design properties of an established low impact development (LID) system treating road runoff. The calibration of the model was based on monitored storm events occurring from May 2010 to July 2013. It was found that the total suspended solids was highly correlated with stormwater runoff ...

Jul. 24, 2015

By IWA Publishing

Treatment of suspended solids and heavy metals from urban stormwater runoff by a tree box filter

Particulates, inorganic and toxic constituents are the most common pollutants associated with urban stormwater runoff. Heavy metals such as chromium, nickel, copper, zinc, cadmium and lead are found to be in high concentration on paved roads or parking lots due to vehicle emissions. In order to control the rapid increase of pollutant loads in stormwater runoff, the Korean Ministry of Environment ...

Jun. 25, 2014

By IWA Publishing

Dual Porosity Filtration for treatment of stormwater runoff: first proof of concept from Copenhagen pilot plant

Dual Porosity Filtration (DPF) is designed for sedimentation-based removal of suspended solids (SS) and adsorption-based removal of dissolved contaminants from stormwater runoff. It consists of shallow (10 mm) low-porosity layers for contaminant retention, interlaid with high-porosity layers for horizontal, gravity-driven flow. First proof of concept was obtained in a 10 m by 60 m pilot plant ...

Jan. 1, 2011

By IWA Publishing

Stormwater treatment area 3/4

Restore the Everglades That's the task the Florida Legislature set for the South Florida Water Management District. But how? Decades of development had eliminated the sheet flow of water from Lake Okeechobee. Densely populated cities and a 700,000-acre agricultural area, drained by 1,500 miles of canals and levees, now lay between the lake and the Everglades. Wetlands have disappeared. ...

Sep. 21, 2009

By Burns & McDonnell

Alkylphenols in atmospheric depositions and urban runoff

A sampling campaign was conducted in order to determine alkylphenol (AP) concentrations in stormwater as well as potential AP sources in suburban environments. An analytical procedure was developed to quantify APs in bulk atmospheric deposition, building runoff, road runoff and stormwater. Both nonylphenols and octylphenols could be quantified in each sample. Median stormwater concentrations ...

Feb. 1, 2011

By IWA Publishing

Super Size My Stormwater Treatment System, Please!

Many municipalities have vast areas of developed impervious acreage from which stormwater drains without any form of treatment. These drainage systems were designed decades ago, predating regulatory requirement for nonpoint source pollution control. Every year pollutants from these sites discharge high levels of sediment, nutrients, trash, and heavy metals into local waters, impairing usage, ...

Oct. 13, 2006

By BaySaver Technologies, Inc.

Meeting New Demands: Treating Urban Runoff

Dry weather runoff from urban creeks is a typical source of bacteria in coastal California. Beyond the Golden State, bacterial contamination of oceans, lakes and streams concerns many municipalities as well as they strive to reach increasingly stringent urban runoff and stormwater regulatory requirements. An innovative solution—ozone treatment for urban runoff—applied at two California beaches ...

Oct. 21, 2006

By Water Environment Federation (WEF)

Stormwater Management for Urban Environments

IntroductionElmhurst College, a hundred-thirty-five year old private learning institution, is proceeding with a campus redevelopment project that will include a one hundred seventy bed residence hall. In addition, the college continues to be a role model for sustainable site design and an educational resource for both students and the community.The need for additional housing, due to ...

Sep. 12, 2007

By Advanced Pavement Technology

Stormwater: Questions and Answers

The whole subject of Stormwater is complicated. Here's a chance for you to check out some of the most frequently asked questions about stormwater . . . and their answers. What is an NPDES (National Pollutant Discharge Elimination System) permit? The Clean Water Act prohibits anybody from discharging 'pollutants' through a 'point source' into a 'water of the United States' unless they ...

Jan. 1, 2007

By Ben Meadows

Preliminary investigation into the pollution reduction performance of swales used in a stormwater treatment train

Permeable pavements have been shown to be effective stormwater treatment devices that can greatly reduce surface runoff and significantly improve the quality of stormwater runoff in urban areas. However, the potential problems with sediment clogging and consequent maintenance requirements have been identified as the main barriers to more widespread adoption of permeable pavements in urban ...

Mar. 13, 2014

By IWA Publishing

Innovative use of lamella clarifiers for central stormwater treatment in separate sewer systems

Lamella settlers have been used in the past few years for the sedimentation of particles in wastewater and stormwater applications. A new and very innovative approach for the treatment of stormwater flows is proposed which extends the portfolio of solutions beyond traditional settling tanks. Surface runoff is stored in a sewer or a basin and finally treated in a small but continuously operated ...

Apr. 24, 2014

By IWA Publishing

Modeling of Sedimentation in Stormwater Detention Basins

ABSTRACTTo minimize the non-point source pollution from roadway surface, the Texas Department of Transportation (TxDOT) initiated a research project for design of a small footprint non-proprietary detention basin, which consists of pipes and box culvert sections with specialized inlet and outlet system. A conceptual model was developed to estimate particle removal efficiency of the rectangular ...

Oct. 22, 2006

By Water Environment Federation (WEF)

A Comparison of Two Media Filtration BMP Treatments for the Removal of PAHS and Phthalates from Roadway Runoff

Urban runoff is a major contributor to the degradation of our urban streams, rivers, and lakes (Pitt, 1995). Organic pollutants, such as PAHs and phthalates, in urban stormwater can contribute to receiving water degradation (EPA, 1983). A study in Rhode Island’s Narragansett Bay watershed found that urban runoff accounted for 71 percent of the total inputs to the bay for higher molecular weight ...

Jul. 25, 2006

Passive treatment system helps boatyard meet stormwater benchmarks

Untitled Document When the Environmental Protection Agency (EPA) threatened to put shipyards in the Coos Bay Estuary on the National Priorities List of hazardous waste sites, the Charleston ...

Jan. 1, 2004

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