01632123

Monograph

http://www.trb.org/Main/Blurbs/175744.aspx

The ACRP 02-43 Research Project, Development of a NOₓ Chemistry Module for Emissions and Dispersion Modeling System/Aviation Environmental Design Tool (EDMS/AEDT) to Predict NO₂ concentrations, was undertaken due to concern that existing methods used to predict NOₓ concentrations at airports may be inaccurate. The research project was aimed at three primary objectives: assess the accuracy of the NOₓ emissions and speciation methods used in Federal Aviation Administration’s (FAA’s) EDMS/AEDT models and the U.S. EPA AERMOD model to predict NO₂ concentrations near airports; develop and assess alternative methods (including at least one involving the NO, NO₂, and O3 “photostationary state”; and produce a preferred method for predicting NO₂ concentrations resulting from airport emissions. The products of the research: (i.) a final report entitled Development of NOₓ Chemistry Module for EDMS/AEDT to Predict NO₂ Concentrations, (ii.) a preferred method and (iii.) a computer module for the preferred method will help to ensure that the underlying mechanics and predictive accuracies of FAA’s EDMS/AEDT and EPA’s AERMOD are appropriate for airports and are as accurate as possible. The research goals are also focused on several key targets: reasonable data requirement; technically defensible methodology; computational requirements; reasonable accuracy; and compatible with EDMS/AEDT/AERMOD. The research is primarily focused on modeling of short-term NO₂ concentrations, commensurate with the promulgation of the new NAAQS for this pollutant. In support of the research, a substantial number and wide array of models and methods were analyzed using monitor-to-model and model-to-model comparisons of airport-related NOₓ/NO₂ ratios and the resultant NO₂ concentrations. Based upon the outcomes of the research, a recommended preferred method for simulating the NO₂/NOₓ formation and dispersion characteristics was developed as a module for use in the EDMS/AEDT-AERMOD software package. This module is called the ARM2-Airport Module and the computer software for its adoption into EDMS/AEDT-AERMOD is included as part of the research. During the course of this research, a number of needs were identified for potential ACRP research, with specific recommendations for further advancing the model simulation of how airport-related NOₓ is dispersed from airports and the transition mechanisms by which NO₂ is formed in airport environs.

ACRP Project 02-43

English

330p

2016-12

ACRP Web-Only Document

Contractor's Final Report

Digital/other

Appendices; Tables

Airports; Concentration (Chemistry); Nitrogen oxides; Pollutants; Software

Emissions models

Aviation; Environment

TRIS, TRB, ATRI

Mar 30 2017 2:41PM