Mortality, Surveillance and the Tertiary “Funnel Effect” on the U.S.-Mexico Border: A Geospatial Modeling of the Geography of Deterrence

Samuel Norton Chambers, Geoffrey Alan Boyce, Sarah Launius and Alicia Dinsmore

Journal of Borderlands Studies, 2021, vol. 36, issue 3, 443-468

Abstract: Theories of migration deterrence have long posited that border enforcement infrastructure pushes migration routes into more rugged and deadly terrain, driving an increase in migrant mortality. Applying geospatial analysis of landscape and human variables in one highly-trafficked corridor of the Arizona / Sonora border, we test whether the expansion of surveillance infrastructure has in fact shifted migrants’ routes toward areas that are more remote and difficult to traverse. We deploy a modeling methodology, typically used in archaeological and military science, to measure the energy expenditure of persons traversing the borderlands. Outcomes of this model are then compared to the changes in border infrastructure and records of fatality locations. Findings show that there is a significant correlation between the location of border surveillance technology, the routes taken by migrants, and the locations of recovered human remains in the southern Arizona desert. Placed in the context of ongoing efforts by the United States to geographically expand and concentrate border surveillance and enforcement infrastructure, we argue that this suggests a third “funnel effect” that has the outcome of maximizing the physiological toll imposed by the landscape on unauthorized migrants, long after migration routes have moved away from traditional urban crossing areas.

Date: 2021
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DOI: 10.1080/08865655.2019.1570861

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Journal of Borderlands Studies is currently edited by Emmanuel Brunet-Jailly, Henk van Houtum and Martin van der Velde

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