scholarly journals Comparative evaluation of the US Environmental Protection Agency`s and the Oak Ridge Institute for Science and Education`s environmental survey and site assessment program field sampling procedures

1997 ◽  
Author(s):  
T.J. Vitkus ◽  
T.L. Bright ◽  
S.A. Roberts
Keyword(s):  
Environmental Protection Agency ◽  
Comparative Evaluation ◽  
Field Sampling ◽  
Protection Agency ◽  
Site Assessment ◽  
Oak Ridge ◽  
Assessment Program ◽  
The Us ◽  
Science And Education ◽  
Sampling Procedures

scholarly journals Assessing the Nitrogen and Phosphorus Loading in the Alabama (USA) River Basin Using PLOAD Model

2013 ◽  
Vol 6 ◽  
pp. ASWR.S10548 ◽  
Author(s):  
Dev P. Gurung ◽  
Leonard J.M. Githinji ◽  
Ramble O. Ankumah
Keyword(s):  
Environmental Protection ◽  
River Basin ◽  
Environmental Protection Agency ◽  
Phosphorus Loading ◽  
Field Sampling ◽  
Protection Agency ◽  
Nitrogen And Phosphorus ◽  
Pollutant Loading ◽  
The Us ◽  
Rivers And Streams

Pollutant loadings in two watersheds, Mulberry and Catoma were assessed using the pollutant loading (PLOAD) model and model results were compared with those obtained from field sampling followed by laboratory analysis. The PLOAD model was used to determine water pollutants including total nitrogen (TN), total phosphorus (TP), orthophosphate (PO43-), nitrite (NO2–) and nitrate (NO3–) in two watersheds, Mulberry and Catoma that are part of the Alabama River Basin. Results revealed that both Mulberry and Catoma watersheds had TN and TP values that exceeded the US Environmental Protection Agency (EPA) limits set for rivers and streams. The TN and TP values were in the range of hypertrophic for lakes, and eutrophic for rivers. The PLOAD model results were in agreement with analytical results. We conclude that PLOAD is a valid model for determining pollutant loading in watersheds and provides a relatively faster and cheaper method of assessing impairment of watershed bodies compared to conventional methods.

scholarly journals Benefits of Electrified Powertrains in Medium- and Heavy-Duty Vehicles

2020 ◽  
Vol 11 (1) ◽  
pp. 12
Author(s):  
Ram Vijayagopal ◽  
Aymeric Rousseau
Keyword(s):  
Environmental Protection ◽  
Environmental Protection Agency ◽  
Fuel Saving ◽  
Heavy Duty ◽  
Protection Agency ◽  
Light Duty ◽  
Design Choice ◽  
The Us ◽  
Light Duty Vehicles ◽  
Heavy Duty Vehicles

The benefits of electrified powertrains for light-duty vehicles are well understood, however sufficient published information is not available on the benefits of advanced powertrains on the various types of medium and heavy duty vehicles. Quantifying the benefits of powertrain electrification will help fleet operators understand the advantages or limitations in adopting electrified powertrains in their truck fleets. Trucks vary in size and shape, as they are designed for specific applications. It is necessary to model each kind of truck separately to understand what kind of powertrain architecture will be feasible for their daily operations. This paper examines 11 types of vehicles and 5 powertrain technology choices to quantify the fuel saving potential of each design choice. This study uses the regulatory cycles proposed by the US Environmental Protection Agency (EPA) for measuring fuel consumption.

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