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United States Department of Agriculture

Agricultural Research Service

Research Project: Managing Water Availability and Quality to Maintain Or Increase Agricultural Production, Conserve Natural Resources, and Enhance Environment

Location: Coastal Plain Soil, Water and Plant Conservation Research

Title: Comparison of micrometeorological techniques in measuring gas emissions from waste lagoons

Authors
item Ro, Kyoung
item Johnson, Melvin
item Viguria, Maialen -
item Stone, Kenneth
item Hunt, Patrick

Submitted to: Meeting Proceedings
Publication Type: Proceedings
Publication Acceptance Date: August 9, 2013
Publication Date: December 9, 2013
Citation: Ro, K.S., Johnson, M.H., Viguria, M., Stone, K.C., Hunt, P.G. 2013. Comparison of micrometeorological techniques in measuring gas emissions from waste lagoons. In: Air Quality Measurement Methods and Technology Conference, November 19-21, 2013, Sacramento, California. http://measurements.awma.org

Technical Abstract: In this study, we evaluated and compared the accuracies of two micrometeorological methods using open-path tunable diode laser absorption spectrometers; vertical radial plume mapping method and the inverse dispersion model method. The accuracy of these two methods was evaluated using a 45m x 45m perforated pipe network floating on a 59 m x 68.5 m irrigation pond as a synthetic distributed emission source with known release rates of methane gas. An open-path tunable diode laser mounted on an automatic positioning device was used to collect path-integrated concentrations (PICs) along different optical paths in a vertical plane downwind of controlled methane releases. These methods estimated methane emission rates under unstable atmospheric stability conditions using meteorological and PIC data. The accuracies of these two methods under similar settings will be presented at the meeting.

Last Modified: 10/31/2014
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