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LiDAR Data: Bill Eichinger

A LiDAR Method to Estimate Emission Rates from an Animal Production Facility

Sponsored by the USDA ARS National Laboratory for Agriculture and the Environment

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William B Willis, William E. Eichinger, John H. Prueger, Cathleen J. Hapeman, Hong Li, Michael D. Buser, Sean J. Plenner, Warren Clarida, Stephen D. Browne, Peter M. Downey, Jerry L. Hatfield, Gregory A. Holt, Alba Torrents, and Qi Yao

Abstract

Vegetative environmental buffers (VEBs), also referred to as shelterbelts, help control and reduce particulate emissions from animal production facilities. Unfortunately, it is difficult to quantify emission rates and characterize the effectiveness of VEBs, because spatial distributions of emissions downwind of VEBs are complex. LiDAR (Light Detection and Ranging) can be used to capture this spatial variability. Below, equations and data are presented for using the LiDAR method to estimate capture efficiency. The experiment was conducted over 24–26 June, 2013, at the University of Delaware.

Methodology

The mass extinction efficiency (MEE) relates the lidar extinction coefficients to mass concentration.

 

Formula 1 NEW

The wind speed is modeled above the highest measurement height.

 

Formula 2 NEW

Fluxes and emission rates are computed using the concentration and wind profiles.

 

Formula 3 NEW

The capture efficiency is the ratio of total mass emitted to the total mass released in a time period.

Formula 5 NEW

 

LiDAR image

The lidar was placed NW of the study site. Dust was released inside the
VEB, while the LiDAR scanned downwind of the VEB. Meteorological and
particulate size data were collected downwind of the VEB. Emission rates
and capture efficiencies were determined for both slice 1 and slice 2.

 

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Last modified on April 27th, 2016
Posted on March 21st, 2016

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