AERMOD Updates
description
Transcript of AERMOD Updates
AERMOD UpdatesAERMOD Updates
Robert Opiela, Technical Robert Opiela, Technical SpecialistSpecialist
Technical Program Support Technical Program Support SectionSection
TCEQ, Air Permits DivisionTCEQ, Air Permits Division
Austin, TexasAustin, Texas
April 30, 2008April 30, 2008
IntroductionIntroduction
• Model UpdatesModel Updates
• Modeling Guidance UpdatesModeling Guidance Updates
Model UpdatesModel Updates
• AERMET/AERMAPAERMET/AERMAP– 0634106341– Mainly bug fixesMainly bug fixes
• AERMODAERMOD– 0702607026– Mainly bug fixesMainly bug fixes– Only works with AERMET 06341 dataOnly works with AERMET 06341 data
Model Guidance UpdatesModel Guidance Updates
• Meteorological Data InputsMeteorological Data Inputs– What to doWhat to do– How to do itHow to do it– How to document itHow to document it– Does it make any sense?Does it make any sense?
Examples of Low RoughnessExamples of Low Roughness
Examples of Medium Examples of Medium RoughnessRoughness
Examples of High Examples of High RoughnessRoughness
Appropriate RoughnessAppropriate Roughness
• Define Appropriate Modeling DomainDefine Appropriate Modeling Domain– Depends upon sources in projectDepends upon sources in project
•Low-level dominated, domain is smallLow-level dominated, domain is small
•High, hot stacks, domain is largeHigh, hot stacks, domain is large
– Area that influences the source mostArea that influences the source most
Appropriate RoughnessAppropriate Roughness
• Qualitative AnalysisQualitative Analysis– Land use is clearly dominant in Land use is clearly dominant in
modeling domainmodeling domain– Minimal explanation necessaryMinimal explanation necessary
Qualitative ExampleQualitative Example
Appropriate RoughnessAppropriate Roughness
• Quantitative AnalysisQuantitative Analysis– Data source of values usedData source of values used– Define land use categoriesDefine land use categories– Show ALL calculationsShow ALL calculations– Document ALL selectionsDocument ALL selections
Quantitative ExampleQuantitative Example
Use of Urban OptionUse of Urban Option
• Questionable ApplicationQuestionable Application– Light windsLight winds– Clear skiesClear skies– May not be applicable in sub-tropical May not be applicable in sub-tropical
conditionsconditions
Use of Urban OptionUse of Urban Option
• Questionable ApplicationQuestionable Application– Uncertain of model implementationUncertain of model implementation– Unclear on use of population dataUnclear on use of population data
• Selection is AllowedSelection is Allowed– Provide a strong justification for Provide a strong justification for
selectionselection
Use of Terrain DataUse of Terrain Data
• Document Data SourceDocument Data Source
• Do Not Interpolate DataDo Not Interpolate Data– Use value of gridUse value of grid– May supplement if grid resolution not May supplement if grid resolution not
sufficientsufficient
Streamlining Review Streamlining Review ProcessProcess
• Use Modeling Input Data TemplatesUse Modeling Input Data Templates
• Consult with ADMT Staff Early in ProcessConsult with ADMT Staff Early in Process
• Document Document ALLALL Selections, Assumptions, Selections, Assumptions, etc.etc.
• Not Following Guidance Causes DelaysNot Following Guidance Causes Delays
SummarySummary
• Use Latest Versions of AERMOD Use Latest Versions of AERMOD SystemSystem
• Follow Guidance on Model SelectionsFollow Guidance on Model Selections
• Assist in Streamlining Review ProcessAssist in Streamlining Review Process
• Be a Part of the SolutionBe a Part of the Solution
QuestionsQuestions