Development of the Processed Based Ammonia Model

1
Development of theProcessed Based Ammonia Model
ISSRC University of California at
Riverside University of California at
Davis Environ Iowa State University

• NH3 Conference Call, June 25, 2004

2
Overview

• Review of the last conference call (02/25/04)
  minutes
• Future monthly NH3 conference calls
• Current progress on the NH3 model
• Discussions and feedback on the NH3 Science
  Document
• Discussions on the data document (due 08/31/2004)

3
Review conference call (02/25/04) minutes

• The first version of science document was sent
  out on 02/25/04
• The model development work needs to be wrapped up
  by March, 2004
• Three separate documents would be produced to
  describe the model.
• Science document (Draft 03/31/04 Final
  08/31/2004)
• Data document (Draft 08/31/04 Final 02/28/05)
• Coding document (Draft 09/30/04 Final
  12/15/04)
• Action items
• Documents deliverables
• Data Format
• Forum
• Expand processed-based NH3 model community

4
Future monthly NH3 conference calls

• Propose monthly conference call on last Friday of
  each month (1200 EDT, 1100 CDT, 1000 MDT, 900
  PDT)
• June 25, 2004
• July 30, 2004 (Ruihong, Tom, Zion)
• August 27, 2004 (Jim, Tom, Zion)
• Sept. 24, 2004 (Ruihong, Jim, Tom, Zion)
• October 29, 2004 (Zion, Ruihong, Jim, Tom)
• November 19 (Zion, Ruihong, Jim?, Tom)
• January 14, 2005
• February 28, 2005
• March 25, 2005

5
Coordination among the NH3 team(UCR/UCD/Environ/I
owa State)

• UC Davis (Ruihong, Jim, Tom, Jactone)
• taking the lead to develop the equations for the
  ammonia model
• Transfer developed equations for each sub-model
  to UCR/Environ
• UCR (Zion, Bo, Gail)
• Data Document
• Taking the lead to develop the data document
• Work closely with UCD and Iowa State Univ.
• SQL model development
• Work with Environ to develop coding document
• Provide feedback to UCD regarding NH3 emissions
  from sub-models
• Environ (Gerry, John, Gary, Thuyen)
• Work with UCR to develop coding document
• SQL model development, will work closely with UCR
  and UCD
• Iowa State University (Hong-wei)
• Work with UCD and UCR on the data document and
  data collection

6
Model Development General Approach(Zhang,
Fadel, Rumsey, Arogo)

• Model systems framework
• The 18 animal housing and waste management
  systems identified by US EPA in its draft report
  titled National Emission Inventory- Ammonia
  Emissions from Animal Husbandry Operations, 2003
  is used.
• UCD researchers will develop and test
  mathematical equations
• To calculate the ammonia emission rate (hourly
  and daily) from each of the elements included in
  the 18 animal housing and waste management
  systems.
• The flow of nitrogen in one particular system
  will follow the mass balances.
• The models will be a combination of empirical and
  mechanistic equations.
• The farm ammonia emission model will include
  sub-models for
• animal nitrogen excretion,
• Animal housing,
• manure collection,
• manure storage, and
• land application.
• Each sub-model development will undergo
  literature review and model development stages.

7
Model Development General Approach (2)(Zhang,
Fadel, Rumsey, Arogo)

• Transfer of equations
• UCD will test the equations with Matlab and/or
  spreadsheet (no Fortran code) to verify the
  equations work correctly in sub-models.
• After confirming that all the equations work
  correctly, UCD researchers will give the
  equations to UCR and Environ researchers.
• UCR and Environ researchers will develop computer
  codes for the models in SQL.
• UCD researchers will provide specifications of
  the required input parameter values of ammonia
  emission models.
• UCD researchers will provide feedback to the
  results from the SQL-based ammonia models
  developed by UCR and Environ.
• UCD researchers will prepare a final science
  document describing
• the physical, chemical and biological science and
  processes that the ammonia emission models are
  based on,
• present the mathematical equations in the models
  and
• provide the specifications of the input parameter
  values.

8
Current progress on the NH3 model Development -
UCD

• Animal nitrogen excretion sub-model is completed
  and is being evaluated. The sub-model employs
  equations specified by the new ASAE Standard for
  nitrogen excretion from different species of
  animals based on growth stage, diet,
  productivity, etc. (Fadel)
• Animal housing sub-model is under development
  (Rumsey and Zhang).
• Animal manure storage sub-model is near
  completion (Arogo and Zhang).
• Land application model is in the literature
  review stage (Arogo, Rumsey and Zhang).

9
Time Line on the NH3 Model Development- UCD

• Time line for model development for UCD
  Researchers
• 7/2/04, completion of animal N excretion
  sub-model transfer equations to UCR/Environ
• 7/23/04, completion of animal housing and manure
  storage sub-models (transfer/feedback)
• 8/6/04, completion of land application sub-model
  (transfer/feedback)
• 8/30/04, completion of testing sub-models and
  performing sample calculations for selected
  animal species and state (transfer/feedback).
• 8/30/04, transfer of mathematical equations to
  UCR/Environ for computer model development
• 9/30/04, completion of final science document for
  farm based ammonia emission models.

10
Discussions and feedback on the Draft NH3
Science Document

• As of June 25, 2004, no feedback on the draft NH3
  science document was received.
• Propose to postpone the final science document
  due date to September 30, 2004.

11
Discussions on the data document (due 08/31/2004)

• Data document will attempt to address
• Data needs and formats
• Data sources
• Quality issues
• Quality of data
• Quality procedures
• Contact/Collect local sources/data to augment
  national sources/data.
• How data gets used
• Where data are weak vs. strong (data reliability
  issue)

12
Discussions on the data document (continued)

• A data exchange format (input data format for the
  NH3 model) would be developed.
• After the draft data document (and data) is
  released in August, States would review, update,
  and send data in this format back to the
  development team.
• Data collected by February 28, 2005 would be used
  to create a final set of NH3 emission
  calculations (in March, 2005).