Storm water runoff from urban roadways often contains significant quantities of metal elements and solids. These anthropogenic constituents are generated mainly traffic-related activities. Metal partition into dissolved particulate-bound fractions as a function pH, pavement residence time, solids concentration. Lateral sheet flow an experimental field site on heavily traveled highway in Cincinnati was sampled during five rainfall events 1995. Results indicate that Zn, Cd, Cu form while Pb,...

Urban stormwater runoff from paved surfaces transports a wide gradation of solids ranging in size smaller than 1 μm to greater 10,000 μm. This study measured physical characteristics transported lateral pavement sheet flow heavily traveled roadway Cincinnati. Particles 25 were counted and sized using light obscuration particle counter. larger separated mechanically generate distributions. Solids the 2–8 range generated largest counts rapidly washed pavement. LPSF rate duration controlled...

Eight rainfall-runoff events were examined from each of two small paved urban transportation land use watersheds (A=544m2 and 300m2) in an attempt to distill multiple definitions the first flush phenomenon into a consistent framework examine common volumetric capture requirements. Results indicated that separate criteria must be employed describe delivery suspended sediment concentration (SSC) total dissolved solids (TDS) as aggregate indices entrained particulate matter. The...

Urban drainage from paved surfaces transports a wide gradation of solids ranging sub-micron particles to gravel size aggregates. This study measured physical characteristics transported in lateral pavement sheet flow heavily traveled urban roadway Cincinnati. The characteristic was particle which used as surrogate specific surface area. Solids were sorted according distributions (PSD). ranged smaller than 1 μm greater 10,000 μm. Particles larger 25 separated mechanically generate PSDs. Flow...

Permeable pavement, specifically cementitious permeable pavement (CPP), is a passive structural low impact development material and green infrastructure system for rainfall-runoff control. Multifunctional engineered CPP can fulfill requirements as load-transmitting surface while serving more environmentally conscious that functions to restore the in situ hydrology also functioning treatment unit operation process. As an material; reduces runoff, filters, treats infiltrating thermal pollution...

Examination of speciation for metal elements transported in urban rainfall-runoff events is critical when evaluating the potential fate, bioavailability, and effective control such constituents. In many areas anthropogenic activities result rainfall pH levels that are acidic low alkalinity. As a result, finely abraded metallic components exposed infrastructure can be leached into rainfall-runoff. This study examines influence hydrology on storm water element at upper end Portland cement...

Machine learning (ML) is increasingly implemented to model water infrastructure dynamics. Common ML models are primarily data-driven and require a significant amount of data for robust training. Often, obtaining at higher temporal spatial resolutions in systems can be challenging due cost time considerations. In such scenarios, integrating the existing scientific knowledge into an as physics-informed advantageous enhance predictive capability generalizability. This study examines...

Rainfall runoff and snowmelt impacted by anthropogenic activities can transport significant loads of metals. Ecological concerns recent regulatory guidance have spurred development unit operations such as ex situ sorptive filters engineered media infiltration systems with the intent including sorption mechanisms for metals compared to conventional filter media. Applications rainfall or snow include systems, clarifiers, separation deformable, cartridge, tubular filters. Column breakthrough...

The objectives of this study are to provide detailed information about green roof performance in the Mediterranean climate (retained volume, peak flow reduction, runoff delay) and identify a suitable modelling approach for describing associated hydrologic response. Data collected during 13-month monitoring campaign seasonal (September-December 2008) at experimental site University Genova (Italy) presented together with results obtained quantifying performance. In order examine response,...

Modeling the separation of dilute particulate matter (PM) has been a topic interest since introduction unit operations for clarification rainfall-runoff. One consistent yet controversial issue is representation PM and mechanisms treatment. While Newton's Law surface overflow rate were utilized, many historical models represented as lumped gravimetric index largely out economy lack particle analysis methods. As result such did not provide information about fate in or through operation. In...

Urban drainage from paved surfaces transports a wide gradation of solids ranging sub-micron particles to gravel size aggregates. This study measured physical characteristics transported in lateral pavement sheet flow heavily traveled urban roadway Cincinnati. The characteristic was particle which used as surrogate specific surface area. Solids were sorted according distributions (PSD). ranged smaller than 1 μm greater 10,000 μm. Particles larger 25 separated mechanically generate PSDs. Flow...

Commensurate with development of in situ storm-water control and treatment is the need to quantify delivery granulometry suspended particulate fraction storm water. Consistent this need, study examined so-called "first flush" phenomenon for particles a measured range from 2 75 μm (typically <50 μm), appropriateness single- versus multiple-power-law model particle-number density (PND), application process selection diagrams particle separation. In comparison defined concentration during early...

Urban-rainfall runoff affected by transportation is a complex matrix of very wide gradation particulate matter (< 1 to > 10 000 microm) and dissolved inorganic organic constituents. Particulate transported rainfall can be significant vector for many reactive particulate-bound constituents, particularly metal elements. The water quality hydrology nine events from representative elevated section Interstate (I-10) (eastbound average daily traffic load 70 400 vehicles) in Baton Rouge, Louisiana,...

Compared to storm water runoff, urban roadway snow exposed traffic and winter maintenance practices has a much greater capacity accumulate retrain heavy metals other anthropogenic constituents. Heavy once released in the environment are not degraded partition between dissolved particulate-bound fractions. Residence time, solid loadings, alkalinity, hardness, pH influence partitioning. Accretion partitioning of Pb, Cu, Cd, Zn, Al, Ca, Na, Mg, Fe from series highway sites Cincinnati, Ohio,...

This study used manual full cross‐sectional flow discrete sampling and suspended sediment concentration (SSC) methods to gravimetrically characterize noncolloidal hetero‐disperse particulate matter (PM). PM was examined as suspended, settleable, fractions assess the distinct transport behavior of each fraction throughout runoff event. Eight events loading an urban paved source area watershed were (as SSC) thereof. An event‐based mass balance demonstrated recoveries exceeding 90%. With...