Dehydration Rate and a Novel Model to Aid Search and Relief for Undocumented Border Crossers in the Sonoran Desert

Literature Cited

• Abrego, L., M. Coleman, D. E. Martínez, C. Menjívar, and J. Slack. 2017. Making immigrants into criminals: Legal processes of criminalization in the post-IIRIRA era. Journal on Migration and Human Security 5 (3):694–715. doi: 10.1177/233150241700500308.
   Google Scholar
• Ainslie, P. N., I. T. Campbell, J. P. Lambert, D. P. MacLaren, and T. Reilly. 2005. Physiological and metabolic aspects of very prolonged exercise with particular reference to hill walking. Sports Medicine 35 (7):619–47. doi: 10.2165/00007256-200535070-00006.
   PubMed Web of Science ®Google Scholar
• Alonso, A. D., and B. Nienass. 2016. Deaths, visibility, and responsibility: The politics of mourning at the US–Mexico border. Social Research: An International Quarterly 83 (2):421–51. doi: 10.1353/sor.2016.0036.
   Google Scholar
• Anderson, B. E. 2008. Identifying the dead: Methods utilized by the Pima County (Arizona) Office of the Medical Examiner for undocumented border crossers: 2001–2006. Journal of Forensic Sciences 53 (1):8–15. doi: 10.1111/j.1556-4029.2007.00609.x.
   PubMed Web of Science ®Google Scholar
• Anderson, B. E., and B. O. Parks. 2008. Symposium on border crossing deaths: Introduction. Journal of Forensic Sciences 53 (1):6–7. doi: 10.1111/j.1556-4029.2007.00608.x.
   PubMed Web of Science ®Google Scholar
• Androff, D. K., and K. Y. Tavassoli. 2012. Deaths in the desert: The human rights crisis on the U.S.–Mexico border. Social Work 57 (2):165–73. doi: 10.1093/sw/sws034.
   PubMed Web of Science ®Google Scholar
• Anguelova, Z., D. A. Stow, J. Kaiser, P. E. Dennison, and T. Cova. 2010. Integrating fire behavior and pedestrian mobility models to assess potential risk to humans from wildfires within the US–Mexico border zone. The Professional Geographer 62 (2):230–47.
   Google Scholar
• Bhattacharya, A. B., S. K. Kar, and R. Bhattacharya. 1996. Diffuse solar radiation and associated meteorological parameters in India. Annales Geophysicae 14 (10):1051–59. doi: 10.1007/s00585-996-1051-1.
   Web of Science ®Google Scholar
• Bhattacharyya, D., M. Pal, T. Chatterjee, and D. Majumdar. 2017. Effect of load carriage and natural terrain conditions on cognitive performance in desert environments. Physiology & Behavior 179:253–61. doi: 10.1016/j.physbeh.2017.06.014.
   PubMed Web of Science ®Google Scholar
• Boyce, G. A., and S. N. Chambers. 2021. The corral apparatus: Counterinsurgency and the architecture of death and deterrence along the Mexico/United States border. Geoforum 120:1–13. doi: 10.1016/j.geoforum.2021.01.007.
   Web of Science ®Google Scholar
• Boyce, G. A., S. N. Chambers, and S. Launius. 2019. Bodily inertia and the weaponization of the Sonoran Desert in US boundary enforcement: A GIS modeling of migration routes through Arizona’s Altar Valley. Journal on Migration and Human Security 7 (1):23–35. doi: 10.1177/2331502419825610.
   Google Scholar
• Campbell, M. J., P. E. Dennison, B. W. Butler, and W. G. Page. 2019. Using crowdsourced fitness tracker data to model the relationship between slope and travel rates. Applied Geography 106:93–107.
   Google Scholar
• Campbell-Staton, S., R. Walker, S. Rogers, J. De León, H. Landecker, W. Porter, P. Mathewson, and R. Long. 2021. Physiological costs of undocumented human migration across the Southern United States border. Science 374 (6574):1496–1500. doi: 10.1126/science.abh1924.
   PubMed Web of Science ®Google Scholar
• Cavagna, G. A., H. Thys, and A. Zamboni. 1976. The sources of external work in level walking and running. The Journal of Physiology 262 (3):639–57.
   Google Scholar
• Chambers, S. N. 2020. The spatiotemporal forming of a state of exception: Repurposing hot-spot analysis to map bare-life in Southern Arizona’s borderlands. GeoJournal 85 (5):1373–84. doi: 10.1007/s10708-019-10027-z.
   Web of Science ®Google Scholar
• Chambers, S. N., G. A. Boyce, and W. J. Jacobs. 2021. Constructing a desert labyrinth: The psychological and emotional geographies of deterrence strategy on the US/Mexico border. Emotion, Space and Society 38:100764. doi: 10.1016/j.emospa.2021.100764.
   Web of Science ®Google Scholar
• Chambers, S. N., G. A. Boyce, S. Launius, and A. Dinsmore. 2021. Mortality, surveillance and the tertiary “funnel effect” on the US–Mexico border: A geospatial modeling of the geography of deterrence. Journal of Borderlands Studies 36 (3):443–68. doi: 10.1080/08865655.2019.1570861.
   Web of Science ®Google Scholar
• Chambers, S. N., G. A. Boyce, and D. E. Martínez. 2022. Climate impact or policy choice? The spatiotemporality of thermoregulation and border crosser mortality in Southern Arizona. The Geographical Journal. Advance online publication. doi: 10.1111/geoj.12443.
   Web of Science ®Google Scholar
• Chambers, S. N., B. McMahan, and C. C. Bongers. 2020. Developing a geospatial measure of change in core temperature for migrating persons in the Mexico–US border region. Spatial and Spatio-Temporal Epidemiology 35:100363. doi: 10.1016/j.sste.2020.100363.
   PubMed Web of Science ®Google Scholar
• Chamblee, J. F., G. L. Christopherson, M. Townley, D. DeBorde, and R. Hoover. 2006. Mapping migrant deaths in Southern Arizona: The humane borders GIS. Humane Borders. Accessed July 26, 2021. https://www.researchgate.net/publication/242478128_Mapping_Migrant_Deaths_in_Southern_Arizona_The_Humane_Borders_GIS.
   Google Scholar
• Cheuvront, S. N., and R. W. Kenefick. 2014. Dehydration: Physiology, assessment, and performance effects. Comprehensive Physiology 4 (1):257–85. doi: 10.1002/cphy.c130017.
   PubMed Web of Science ®Google Scholar
• Clifford, J., D. M. Kerslake, and J. L. Waddell. 1959. The effect of wind speed on maximum evaporative capacity in man. The Journal of Physiology 147 (2):253–59. doi: 10.1113/jphysiol.1959.sp006240.
   PubMed Web of Science ®Google Scholar
• Coalición de Derechos Humanos and No More Deaths (CDH and NMD). 2019. The disappeared report part II: Interference with humanitarian aid. Accessed January 15, 2021. http://www.thedisappearedreport.org/uploads/8/3/5/1/83515082/disappeared_report_part_2.pdf.
   Google Scholar
• Coalición de Derechos Humanos and No More Deaths (CDH and NMD). 2021. The disappeared report part III: Left to die. Accessed February 26, 2021. http://www.thedisappearedreport.org/uploads/8/3/5/1/83515082/left_to_die_-_english.pdf.
   Google Scholar
• Crabtree, S. A., D. A. White, C. J. Bradshaw, F. Saltré, A. N. Williams, R. J. Beaman, M. I. Bird, and S. Ulm. 2021. Landscape rules predict optimal superhighways for the first peopling of Sahul. Nature Human Behaviour 5 (10):1303–13.
   Google Scholar
• Cuttitta, P., J. Häberlein, and P. Pallister-Wilkins. 2019. Various actors: The border death regime. In Border deaths: Causes, dynamics and consequences of migration-related mortality, ed. P. Cuttitta and T. Last, 35–52. Amsterdam, The Netherlands: Amsterdam University Press. doi: 10.5117/9789463722322.
   Google Scholar
• De León, J. 2012. “Better to be hot than caught”: Excavating the conflicting roles of migrant material culture. American Anthropologist 114 (3):477–95. doi: 10.1111/j.1548-1433.2012.01447.x.
   Web of Science ®Google Scholar
• De León, J. 2015. The land of open graves: Living and dying on the migrant trail. Berkeley: University of California Press.
   Google Scholar
• Dozier, J., and J. Frew. 1990. Rapid calculation of terrain parameters for radiation modeling from digital elevation data. IEEE Transactions on Geoscience and Remote Sensing 28 (5):963–69. doi: 10.1109/36.58986.
   Web of Science ®Google Scholar
• Dupont, F. J., and C. Dean. 2003. Hydration and the modern warrior’s load. In Research and Technology Organization Human Factors and Medicine Panel (RTOHFM) 86th Symposium on “Maintaining Hydration: Issues, Guidelines, and Delivery,” 1-1–1-3, December 10–11, 2003, Boston, MA. Accessed July 26, 2021. https://www.sto.nato.int/publications/STO%20Meeting%20Proceedings/RTO-MP-HFM-086/MP-HFM-086-$$ALL.pdf.
   Google Scholar
• Ekblom, B., C. J. Greenleaf, J. E. Greenleaf, and L. Hermansen. 1970. Temperature regulation during exercise dehydration in man. Acta Physiologica Scandinavica 79 (4):475–83. doi: 10.1111/j.1748-1716.1970.tb04748.x.
   PubMedGoogle Scholar
• Ericson, J. E., and R. Goldstein. 1980. Work space: A new approach to the analysis of energy expenditure. Anthropology UCLA 10–11:21–30.
   Google Scholar
• Ermida, S. L., P. Soares, V. Mantas, F. M. Göttsche, and I. F. Trigo. 2020. Google Earth engine open-source code for land surface temperature estimation from the Landsat series. Remote Sensing 12 (9):1471. doi: 10.3390/rs12091471.
   Web of Science ®Google Scholar
• Fernández, M. J. R. R. 2017. NAFTAs impact on US–Mexican border security: Drug, trade and migration. Observatoire Politique de L’Amérique Latine et des Caraïbes: Sciences Po Institute and CERI (9). Accessed March 3, 2019. https://www.sciencespo.fr/opalc/sites/sciencespo.fr.opalc/files/NAFTA.pdf.
   Google Scholar
• Fu, P., and P. M. Rich. 2002. A geometric solar radiation model with applications in agriculture and forestry. Computers and Electronics in Agriculture 37 (1–3):25–35. doi: 10.1016/S0168-1699(02)00115-1.
   Web of Science ®Google Scholar
• Gagnon, D., O. Jay, and G. P. Kenny. 2013. The evaporative requirement for heat balance determines whole‐body sweat rate during exercise under conditions permitting full evaporation. The Journal of Physiology 591 (11):2925–35. doi: 10.1113/jphysiol.2012.248823.
   PubMed Web of Science ®Google Scholar
• Garfin, G., A. Jardine, R. Merideth, M. Black, and S. LeRoy, eds. 2013. Assessment of climate change in the southwest United States: A report prepared for the national climate assessment. Washington, DC: Island.
   Google Scholar
• Giordano, A., and M. K. Spradley. 2017. Migrant deaths at the Arizona–Mexico border: Spatial trends of a mass disaster. Forensic Science International 280:200–12. doi: 10.1016/j.forsciint.2017.07.031.
   PubMed Web of Science ®Google Scholar
• Gocha, T. P., M. K. Spradley, and R. Strand. 2018. Bodies in limbo: Issues in identification and repatriation of migrant remains in South Texas. In Sociopolitics of migrant death and repatriation: Perspectives from forensic science, ed. K. E. Latham and A. J. O’Daniel, 143–56. Cham, Switzerland: Springer.
   Google Scholar
• Gokee, C., H. Stewart, and J. De León. 2020. Scales of suffering in the US–Mexico borderlands. International Journal of Historical Archaeology 24 (4):823–51. doi: 10.1007/s10761-019-00535-6.
   Web of Science ®Google Scholar
• Golash-Boza, T., and P. Hondagneu-Sotelo. 2013. Latino immigrant men and the deportation crisis: A gendered racial removal program. Latino Studies 11 (3):271–92. doi: 10.1057/lst.2013.14.
   Google Scholar
• Golkar, F., A. A. Sabziparvar, R. Khanbilvardi, M. J. Nazemosadat, S. Zand-Parsa, and Y. Rezaei. 2018. Estimation of instantaneous air temperature using remote sensing data. International Journal of Remote Sensing 39 (1):258–75. doi: 10.1080/01431161.2017.1382743.
   Web of Science ®Google Scholar
• Gonzalez, P., G. Garfin, D. Breshears, K. Broks, E. H. Elias, N. Huntly, J. Maldonado, N. Mantua, H. Margolis, and B. Udall. 2018. The fourth national climate assessment. doi: 10.1002/essoar.10500376.1.
   Google Scholar
• Gonzalez, R. R., S. N. Cheuvront, B. R. Ely, D. S. Moran, A. Hadid, T. L. Endrusick, and M. N. Sawka. 2012. Sweat rate prediction equations for outdoor exercise with transient solar radiation. Journal of Applied Physiology 112 (8):1300–10. doi: 10.1152/japplphysiol.01056.2011.
   PubMed Web of Science ®Google Scholar
• Gonzalez, R. R., S. N. Cheuvront, D. A. Goodman, L. A. Blanchard, L. G. Berglund, and M. N. Sawka. 2008. Corrections to the Shapiro equation used to predict sweating and water requirements. New Mexico State University, Las Cruces, Department of Biology. Accessed December 20, 2020. https://apps.dtic.mil/sti/citations/ADA475891.
   Google Scholar
• Guo, Y., Y. Li, H. Tokura, T. Wong, J. Chung, A. S. Wong, M. D. Indulal Gohel, and P. H. M. Leung. 2008. Impact of fabric moisture transport properties on physiological responses when wearing protective clothing. Textile Research Journal 78 (12):1057–69. doi: 10.1177/0040517508090496.
   Web of Science ®Google Scholar
• Hiemstra, N. 2019. Detain and deport: The chaotic US immigration enforcement regime. Athens: University of Georgia Press.
   Google Scholar
• Hughes, P. 2000. Direct solar radiation: A modelling technique. 12th Annual Colloquium of the Spatial Information Research Centre, Dunedin, New Zealand, University of Otago 10 (13):10.
   Google Scholar
• Humane Borders. 2022. Humane Borders, Inc. Accessed March 1, 2022. https://humaneborders.org/.
   Google Scholar
• Jimenez, M. 2009. Humanitarian crisis: Migrant deaths at the U.S.–Mexico border. American Civil Liberties Union. Accessed January 12, 2021. https://www.aclu.org/legal-document/humanitarian-crisis-migrant-deaths-us-mexico-border.
   Google Scholar
• Judelson, D. A., C. M. Maresh, J. M. Anderson, L. E. Armstrong, D. J. Casa, W. J. Kraemer, and J. S. Volek. 2007. Hydration and muscular performance: Does fluid balance affect strength, power and high-intensity endurance? Sports Medicine 37 (10):907–21. doi: 10.2165/00007256-200737100-00006.
   PubMed Web of Science ®Google Scholar
• Kamiya, T., R. Onishi, S. Kodera, and A. Hirata. 2019. Estimation of time-course core temperature and water loss in realistic adult and child models with urban micrometeorology prediction. International Journal of Environmental Research and Public Health 16 (24):5097. doi: 10.3390/ijerph16245097.
   PubMed Web of Science ®Google Scholar
• Kay, A. 2012. Route choice in hilly terrain. Geographical Analysis 44 (2):87–108.
   Google Scholar
• Kennedy, C. 2011. 100° days, past and future. National Oceanic and Atmospheric Administration, Washington, DC. Accessed March 9, 2020. Climate.gov.
   Google Scholar
• Kowalsky, D. B., J. R. Rebula, L. V. Ojeda, P. G. Adamczyk, and A. D. Kuo. 2021. Human walking in the real world: Interactions between terrain type, gait parameters, and energy expenditure. PLoS ONE 16 (1):e0228682. doi: 10.1371/journal.pone.0228682.
   PubMed Web of Science ®Google Scholar
• Lawrence, S., and J. Wildgen. 2012. Manifold destiny: Migrant deaths and destinations in the Arizona desert. Growth and Change 43 (3):482–504. doi: 10.1111/j.1468-2257.2012.00595.x.
   Web of Science ®Google Scholar
• Leonard, W. R., and M. L. Robertson. 1992. Nutritional requirements and human evolution: A bioenergetics model. American Journal of Human Biology: The Official Journal of the Human Biology Council 4 (2):179–95. doi: 10.1002/ajhb.1310040204.
   PubMed Web of Science ®Google Scholar
• Lougee, K. M., G. L. Hess, and D. C. Winston. 2018. Environmental deaths in Southern Arizona. Academic Forensic Pathology 8 (1):50–63. doi: 10.23907/2018.004.
   PubMedGoogle Scholar
• Márquez-Pérez, J., I. Vallejo-Villalta, and J. I. Álvarez-Francoso. 2017. Estimated travel time for walking trails in natural areas. Geografisk Tidsskrift-Danish Journal of Geography 117 (1):53–62.
   Google Scholar
• Martinez, D., R. Reineke, B. Anderson, G. Hess, B. Parks, G. Soto, and R. Rubio-Goldsmith. 2021. Migrant deaths in southern Arizona: Recovered undocumented border crosser remains investigated by the Pima County Office of the Medical Examiner, 1990–2020. Available at SSRN.
   Google Scholar
• Martínez, D. E., R. C. Reineke, J. Boyce, S. N. Chambers, S. Launius, B. E. Anderson, G. L. Hess, J. M. Vollner, B. O. Parks, C. C. M. Vogelsberg, et al. 2021. Migrant deaths in Southern Arizona: Recovered undocumented border crosser remains investigated by the Pima County Office of the Medical Examiner, 1990–2020. The University of Arizona College of Social & Behavioral Sciences, Binational Migration Institute, Tucson, AZ. Accessed November 26, 2021. https://bmi.arizona.edu/sites/default/files/BMI%20Report%202021%20ENGLISH_FINAL.pdf.
   Google Scholar
• Martínez, D. E., R. C. Reineke, R. Rubio-Goldsmith, and B. O. Parks. 2014. Structural violence and migrant deaths in Southern Arizona: Data from the Pima County Office of the Medical Examiner, 1990–2013. Journal on Migration and Human Security 2 (4):257–86. doi: 10.1177/233150241400200401.
   Google Scholar
• Massey, F. J., Jr. 1951. The Kolmogorov–Smirnov test for goodness of fit. Journal of the American Statistical Association 46 (253):68–78. doi: 10.1080/01621459.1951.10500769.
   Web of Science ®Google Scholar
• McMahon, S., and N. Sigona. 2021. Death and migration: Migrant journeys and the governance of migration during Europe’s “migration crisis.” International Migration Review 55 (2):605–28. doi: 10.1177/0197918320958615.
   Web of Science ®Google Scholar
• Meissner, D., and D. Kerwin. 2009. DHS and immigration: Taking stock and correcting course. Washington, DC: Migration Policy Institute. Accessed March 3, 2019. https://www.migrationpolicy.org/sites/default/files/publications/DHS_Feb09.pdf.
   Google Scholar
• Montain, S. J., M. Ely, W. R. Santee, and K. Friedl. 2010. Water requirements and soldier hydration, ed. W. R. Santee and K. E. Friedl. Washington, DC: Borden Institute.
   Google Scholar
• Moran, P. A. 1950. Notes on continuous stochastic phenomena. Biometrika 37 (1–2):17–23. doi: 10.2307/2332142.
   PubMed Web of Science ®Google Scholar
• Nag, P. K., P. Dutta, V. Chorsiya, and A. Nag. 2014. GIS visualization of climate change and prediction of human responses. In Computational intelligence techniques in earth and environmental sciences, ed. T Islam, P. K. Srivastava, M. Gupta, X. Zhu, and S. Mukherjee, 93–105. Dordrecht, The Netherlands: Springer.
   Google Scholar
• National Missing and Unidentified Persons System. 2022. NamUs Program. Accessed March 1, 2022. https://namus.nij.ojp.gov/.
   Google Scholar
• Newell, B. C., R. Gomez, and V. Guajardo. 2017. Sensors, cameras, and the new “normal” in clandestine migration: How undocumented migrants experience surveillance at the US–Mexico border. Surveillance & Society 15 (1):21–41. https://ssrn.com/abstract=2749545. doi: 10.24908/ss.v15i1.5604.
   Web of Science ®Google Scholar
• Nielsen, B., and C. T. M. Davies. 1976. Temperature regulation during exercise in water and air. Acta Physiologica Scandinavica 98 (4):500–08. doi: 10.1111/j.1748-1716.1976.tb10342.x.
   PubMedGoogle Scholar
• Nielsen, B., K. Kassow, and F. E. Aschengreen. 1988. Heat balance during exercise in the sun. European Journal of Applied Physiology and Occupational Physiology 58 (1–2):189–96. doi: 10.1007/BF00636625.
   PubMed Web of Science ®Google Scholar
• North American Free Trade Agreement Implementation Act (NAFTA). 1994. H.R.3450, 103rd Congress. https://www.congress.gov/bill/103rd-congress/house-bill/3450.
   Google Scholar
• Páez, A., Z. Anjum, S. E. Dickson-Anderson, C. J. Schuster-Wallace, B. M. Ramos, and C. D. Higgins. 2020. Comparing distance, time, and metabolic energy cost functions for walking accessibility in infrastructure-poor regions. Journal of Transport Geography 82:102564.
   Google Scholar
• Pandolf, K. B., M. F. Haisman, and R. F. Goldman. 1976. Metabolic energy expenditure and terrain coefficients for walking on snow. Ergonomics 19 (6):683–90. doi: 10.1080/00140137608931583.
   PubMed Web of Science ®Google Scholar
• Pryor, R. R., B. L. Bennett, F. G. O’Connor, J. M. Young, and C. A. Asplund. 2015. Medical evaluation for exposure extremes: Heat. Wilderness & Environmental Medicine 26 (4):69–75. doi: 10.1016/j.wem.2015.09.009.
   Google Scholar
• Ravanelli, N. C., C. Bongers, and O. Jay. 2019. The biophysics of human heat exchange. In Heat stress in sport and exercise, ed. J. Périard and S. Racinais, 29–43. Cham, Switzerland: Springer. doi: 10.1007/978-3-319-93515-7_2.
   Google Scholar
• Regan, M. 2010. The death of Josseline: Immigration stories from the Arizona borderlands. Boston: Beacon Press.
   Google Scholar
• Reineke, R., and D. E. Martínez, 2014. Migrant deaths in the Americas (United States and Mexico). Fatal Journeys: Tracking Lives Lost during Migration 45:45–75.
   Google Scholar
• Rivera, S. 2021. Tragedy in the Arizona desert: Border agents recall discovery of 14 dead migrants 20 years ago. Accessed July 23, 2021. https://www.borderreport.com/hot-topics/immigration/tragedy-in-the-arizona-desert-border-agents-recall-discovery-of-14-dead-migrants-20-years-ago.
   Google Scholar
• Robergs, R. A., D. R. Wagner, and K. M. Skemp. 1997. Oxygen consumption and energy expenditure of level versus downhill running. Journal of Sports Medicine and Physical Fitness 37 (3):168–74.
   PubMed Web of Science ®Google Scholar
• Rubio-Goldsmith, R., M. McCormick, D. Martinez, and I. Duarte. 2006. The “funnel effect” and recovered bodies of unauthorized migrants processed by the Pima County Office of the Medical Examiner, 1990–2005. https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3040107
   Google Scholar
• Santee, W. R., and R. R. Gonzales. 1987. Characteristics of the thermal environment: Army Research Institute of Environmental Medicine. Natick, MA: Defense Technical Information Center. https://apps.dtic.mil/sti/citations/ADA188359.
   Google Scholar
• Sapkota, S., H. W. Kohl, J. Gilchrist, J. McAuliffe, B. Parks, B. England, T. Flood, C. M. Sewell, D. Perrotta, M. Escobedo, et al. 2006. Unauthorized border crossings and migrant deaths: Arizona, New Mexico, and El Paso, Texas, 2002–2003. American Journal of Public Health 96 (7):1282–87. doi: 10.2105/AJPH.2005.075168.
   PubMed Web of Science ®Google Scholar
• Sawka, M. N., W. A. Latzka, R. P. Matott, and S. J. Montain. 1998. Hydration effects on temperature regulation. International Journal of Sports Medicine 19 (Suppl. 2):S108–S110. doi: 10.1055/s-2007-971971.
   PubMed Web of Science ®Google Scholar
• Sawka, M. N., S. J. Montain, and W. A. Latzka. 2001. Hydration effects on thermoregulation and performance in the heat. Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology 128 (4):679–90. doi: 10.1016/S1095-6433(01)00274-4.
   PubMed Web of Science ®Google Scholar
• Schimpl, M., C. Moore, C. Lederer, A. Neuhaus, J. Sambrook, J. Danesh, W. Ouwehand, and M. Daumer. 2011. Association between walking speed and age in healthy, free-living individuals using mobile accelerometry—A cross-sectional study. PloS one 6 (8):e23299.
   Google Scholar
• Shapiro, Y., Y. Epstein, C. Ben-Simchon, and H. Tsur. 1982. Thermoregulatory responses of patients with extensive healed burns. Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology 53 (4):1019–22. doi: 10.1152/jappl.1982.53.4.1019.
   PubMed Web of Science ®Google Scholar
• Siegert, C. C., S. Mavroudas, D. S. Gleiber, N. P. Herrmann, and M. K. Spradley. 2019. The application of geographic information systems (GIS) to the migrant crisis in South Texas: Modeling migration in Brooks County, Texas. Paper presented at the 72nd Annual Meeting of the American Academy of Forensic Sciences, Anaheim, CA.
   Google Scholar
• Soto, G. 2018. Banal materiality and the idea of sovereignty: The migration funnel effect and the policing of the US-Mexico border, 2000–2016. Political Geography 66 (1):113–29. doi: 10.1016/j.polgeo.2018.08.003.
   Google Scholar
• Soto, G., and D. E. Martínez. 2018. The geography of migrant death: Implications for policy and forensic science. In Sociopolitics of migrant death and repatriation: Perspectives from forensic science, ed. K. E. Latham and A. J. O’Daniel, 67–82. Cham, Switzerland: Springer. doi:10.1007/978-3-319-61866-1_6.
   Google Scholar
• Spradley, M. K., N. P. Herrmann, C. B. Siegert, and C. P. McDaneld. 2019. Identifying migrant remains in South Texas: Policy and practice. Forensic Sciences Research 4 (1):60–68. doi: 10.1080/20961790.2018.1497437.
   PubMedGoogle Scholar
• Stern, C. 2015. Webb County statistics & procedure information. Austin: Texas Judicial Branch. Accessed July 14, 2021. https://www.txcourts.gov/media/1440433/webb-county-medical-examiner-border-crossing-fatalities-2013-2015.pdf.
   Google Scholar
• Szlyk, P. C., I. V. Sils, R. P. Francesconi, R. W. Hubbard, and W. T. Matthew. 1988. Variability in intake and dehydration in young men during a simulated desert walk: Army Research Institute of Environmental Medicine. Natick, MA: Defense Technical Information Center. https://apps.dtic.mil/sti/pdfs/ADA192654.pdf.
   Google Scholar
• Tazzioli, M. 2021. Towards a genealogy of migrant struggles and rescue. The memory of solidarity at the Alpine border. Citizenship Studies 25 (5):603–19. doi: 10.1080/13621025.2021.1923657.
   Web of Science ®Google Scholar
• Tobler, W. 1993. Three presentations on geographical analysis and modeling: Non-isotropic geographic modeling, speculations on the geometry of geography, and global spatial analysis. National Center for Geographic Information and Analysis Technical Report 93 (1):1–26. https://escholarship.org/uc/item/05r820mz.
   Google Scholar
• U.S. Customs and Border Protection (CBP). 1994. Border Patrol Strategic Plan: 1994 and beyond. Accessed January 12, 2021. http://cw.routledge.com/textbooks/9780415996945/gov-docs/1994.pdf.
   Google Scholar
• U.S. Customs and Border Protection (CBP). 2020. U.S. Border Patrol fiscal year Southwest border sector deaths (FY 1998–FY 2020). In Stats and summaries. Washington, DC: Department of Homeland Security. Accessed January 12, 2021. https://www.cbp.gov/sites/default/files/assets/documents/2020-Jan/U.S.%20Border%20Patrol%20Fiscal%20Year%20Southwest%20Border%20Sector%20Deaths%20%28FY%201998%20-%20FY%202019%29_0.pdf.
   Google Scholar
• U.S. Department of the Army. 2002. U.S. Army field manual 3-05.70 Survival. https://irp.fas.org/doddir/army/fm3-05-70.pdf.
   Google Scholar
• U.S. Geological Survey. 2017. 1/3rd arc-second Digital Elevation Models (DEMs). USGS National Map 3DEP downloadable data collection. Accessed June 20, 2020. https://data.usgs.gov/datacatalog/data/USGS:3a81321b-c153-416f-98b7-cc8e5f0e17c3#:∼:text=The%20seamless%201%2F3%20arc,of%201983%20(NAD%2083).
   Google Scholar
• U.S. Government Accountability Office (GAO). 1994. Border control: Revised strategy is showing some positive results. GAO/GGD-95-30. U.S. Government Accountability Office, Washington, DC.
   Google Scholar
• U.S. Government Accountability Office (GAO). 2001. INS’s southwest border strategy: Resource and impact issues remain after seven years. GAO-01-842. U.S. Government Accountability Office, Washington, DC. Accessed January 12, 2021. https://www.gao.gov/assets/gao-01-842.pdf.
   Google Scholar
• U.S. Government Accountability Office (GAO). 2006. Illegal immigration: Border-crossing deaths have doubled since 1995; Border Patrol’s efforts to prevent deaths have not been fully evaluated. GAO-06-770. U.S. Government Accountability Office, Washington, DC. Accessed January 12, 2021. https://www.gao.gov/assets/260/251173.pdf.
   Google Scholar
• U.S. Government Accountability Office (GAO). 2020. Southwest border: CBP needs to increase oversight of funds, medical care, and reporting of deaths. GAO-20-536. U.S. Government Accountability Office, Washington, DC. Accessed November 21, 2021. https://www.gao.gov/products/gao-20-536.
   Google Scholar
• Vogelsberg, C. C. M. 2018. Identification of deceased border crossers: Investigating spatial and skeletal attributes of migrant deaths. PhD dissertation, Michigan State University, East Lansing.
   Google Scholar
• White, D. A., and S. B. Barber. 2012. Geospatial modeling of pedestrian transportation networks: A case study from pre-Columbian Oaxaca. Mexico Journal of Archaeological Science 39 (8):2684–96. doi: 10.1016/j.jas.2012.04.017.
   Web of Science ®Google Scholar
• Whitley, T. G., and G. Burns. 2008. Conditional GIS surfaces and their potential for archaeological predictive modelling in layers of perception. In Proceedings of the 35th International Conference on Computer Applications and Quantitative Methods in Archaeology (CAA), ed. A. Posluschny, K. Lambers, and I. Herzog, 292–98. Bonn, Germany: Dr. Rudolf Habelt GmbH. doi: 10.11588/propylaeumdok.00000546.
   Google Scholar
• Wood, B. M., and Z. J. Wood. 2006. Energetically optimal travel across terrain: Visualizations and a new metric of geographic distance with anthropological applications. In Visualization and Data Analysis 2006, ed. R. F. Erbacher, J. C. Roberts, M. T. Gröhn, and K. Börner, 6060. San Jose, CA: International Society for Optics and Photonics. doi: 10.1124/pr.110.004499.
   Google Scholar