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United States Department of Agriculture

Agricultural Research Service

Research Project: DEVELOPMENT OF INSTRUMENTS FOR MEASUREMENT OF PARTICULATES AND GASES FROM AGRICULTURAL OPERATIONS
2009 Annual Report


1a.Objectives (from AD-416)
1. Improve methods for the quantification of emissions from individual agricultural sources and whole agricultural facilities or management operations. 2. Develop methods to predict emissions and their dispersion from individual sources and whole facilities or management operations. 3. Validate the prediction tools for a variety of agricultural sources.


1b.Approach (from AD-416)
In a previous project a prototype lidar system for measuring particulate matter emissions was developed and evaluated. This system will be refined to improve the portability, usability and reliability for routine measurements across a wide variety of agricultural systems. Evaluation of the system will include comparisons against in situ samples of particulates to increase the reliability of the method using accepted EPA verification methodologies. Comparisons will be used to provide detailed specifications of the performance capabilities of the unit. Evaluation of the emissions measurement capabilities will be conducted under laboratory and field conditions. Integration of the particulate and gaseous units with ancillary micrometeorology will be coordinated with ARS scientists during field measurements. The development of new systems for the measurement of gaseous emissions from agricultural sources will include identification of the most critical gases of interest to agriculture, characterization of system capabilities, and performance compared to accepted standards. A project review will be conducted during the first year.


3.Progress Report

The goal of this project is to refine the lidar system for the measurement of particulates emitted from agricultural operations and provide a more detailed evaluation of the performance of the instrument. This evaluation will include the determination of the accuracy limits of this method, the precision in which the results are obtained, and a complete documentation of the algorithms used to estimate the particulate loads in the plume. The redesign of the instrument is being undertaken to decrease the labor requirements for the deployment and operation of the instrument. Monthly teleconferences are conducted to evaluate the progress toward the project objectives.


Last Modified: 4/21/2014
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