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Innovative approach for estimating fugitive gaseous fluxes using computed tomography and remote optical sensing
1Department of Environmental Health, University of Washington, Seattle, USA.
Journal of the Air & Waste Management Association (1995)
|September 15, 1999
Summary
This study introduces a novel method combining Computed Tomography (CT) and Path-Integrated Optical Remote Sensing (PI-ORS) to accurately quantify fugitive gaseous air pollution emissions, proving robust even with significant measurement errors.
Area of Science:
- Environmental Science
- Atmospheric Chemistry
- Remote Sensing
Background:
- Fugitive gaseous air pollution emissions are challenging to quantify accurately.
- Traditional methods may lack precision, especially under variable conditions.
Purpose of the Study:
- To develop and evaluate a new approach for quantifying emissions from fugitive gaseous air pollution sources.
- To assess the robustness of the proposed method under various simulated conditions.
Main Methods:
- Combining Computed Tomography (CT) with Path-Integrated Optical Remote Sensing (PI-ORS) concentration data.
- Utilizing a novel CT technique with Smooth Basis Function Minimization and wind data for flux estimation.
- Simulating measurement errors based on Open-Path Fourier Transform Infra-Red (OP-FTIR) data.
Main Results:
- The proposed methodology demonstrated robustness against simulated measurement errors.
- Successful retrieval of emission rates was achieved over a wide range of wind directions (70 degrees) even with sparse beam geometry.
- The approach proved effective under diverse meteorological conditions.
Conclusions:
- The integrated CT and PI-ORS approach offers a reliable method for quantifying fugitive emissions.
- The technique is resilient to measurement inaccuracies and fluctuating wind directions, enhancing its practical applicability.