Record Display for the EPA National Library Catalog


Main Title Calculation of age distributions in the nonroad model : growth and scrappage /
CORP Author United States. Environmental Protection Agency. Office of Transportation and Air Quality. Assessment and Standards Division,
Publisher United States Environmental Protection Agency, Office of Air and Radiation,
Year Published 2005
Report Number EPA420-R-05-018
Stock Number PB2010-107319
OCLC Number 865091085
Subjects Off-road vehicles--Environmental aspects--United States--Forecasting ; Air--Pollution--United States--Forecasting ; Combustion gases--Environmental aspects--United States--Forecasting
Additional Subjects Population growth ; Scrappage curve ; Calculations ; Nonroad equipment populations ; NONROAD2004 emission inventory model ; Equipment age distributions ; Environmental Protection Agency
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
ELCD  EPA 420-R-05-018 PDF file on file NVFEL Library/Ann Arbor, MI 12/16/2013
NTIS  PB2010-107319 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 1 online resource ([16] pages) : charts
The NONROAD2005 version of the US EPA nonroad engine emission inventory model ('NONROAD') calculates nonroad equipment populations by age (i.e., an age distribution) for given equipment types and scenario years. This calculation is necessary for the model to account for factors which affect nonroad emissions over time as the in-use fleet ages and turns over to newer equipment, including emissions deterioration, new emissions standards, technology changes, and changes in equipment population resulting from sales growth trends. The NONROAD model calculates equipment age distributions for the base year (as given in the equipment population input file) based on estimated engine populations for that year combined with the scrappage function and growth inputs. The model calculates age distributions for future years by stepping through each year between the base and future years; for each year, the model projects equipment populations, scrappage for each model year of equipment still in service, and equipment sales needed to attain the projected population.
"EPA420-R-05-018." "December 2005." "NR-007c." Title from PDF title screen (viewed on December 12, 2013). Includes bibliographical references (page 10). Technical report.