Fine-Grained Monitoring of Gas Flaring in Persian Gulf Countries With Multispectral SDGSAT-1 Nighttime Imagery

Le résumé fourni par la source

Gas flaring is a major source of greenhouse gas and a waste of non-renewable resources. Remote sensing is suggested to be a capable proxy to provide independent, reliable, and regular observations on global gas flaring. Multiple satellite sensors, especially nighttime imagers, have been used to detect and characterize gas flares. However, the hundred-meter level coarse resolution of current nighttime sensors impacts the accuracy of detection and estimation with small fires undetected. In this study, we explore the potential of high resolution multi-spectral SDGSAT-1 Glimmer Imager for Urbanization (GIU) data and we propose a fine-grained gas flaring detection and estimation method based on the visible optical structure zones of gas flares. The study area of this work locates mainly in eight Persian Gulf countries. Existences, locations, volumes, and extents of gas flares within the study area are captured and analyzed. The proposed method achieves a detection accuracy of 90.46% with 891 active fire sites correctly recognized. Comparisons with Daytime Approach for gas Flaring Investigation (DAFI) V2 data show that our method generates less miss-detection especially when detecting small-sized gas flares, which demonstrates the utility of high resolution nighttime imagery and the proposed optical-based method.

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