Rapid mapping and impact estimation of illegal charcoal production in southern Somalia based on WorldView-1 imagery

Abstract

Following more than 20years of civil unrest, environmental information for southern Somalia is scarce. Wood charcoal production and export is a major activity supporting war regimes in this area such as the extreme Islamist group Al-Shabaab. However, little quantitative information exists on the extent of this charcoal production. In this study, we developed a semi-automatic detection method to identify charcoal production sites from very high resolution (0.5m) satellite imagery. We then applied it to a 4700km2 area along the Juba River in southern Somalia using 2011 and 2013 WorldView-1 imagery. Based on the sites detected exclusively for 2013 we estimated an average production of 24,000tonnes of charcoal and 2.7% tree loss for the two-year interval, using literature- and local-knowledge-based assumptions on likely ranges of kiln and tree parameters. Our large-area assessment helps to better understand the dimension and impact of charcoal production in southern Somalia and reveals a rapid depletion of tree cover. The analysis provides a first step towards the development of a charcoal production monitoring system that could be extended to other parts of the country.