No landward movement: examining 80 years of population migration and shoreline change in Louisiana
Louisiana lost nearly 5,000 km2 of its coastal land area due to relative sea level rise (including local, regional, and global factors driving relative sea level change) since 1932, mirroring both the hazards associated with sea level rise and the time horizons of sea level rise impacts expected this century. This represents an opportunity to examine the relationship between long-term population changes and shoreline change. Based on detailed land change data for the period 1932–2010 and a small area population estimation technique for the period 1940–2010, we examine intra-parish population changes in relation to shoreline changes for the one million plus residents living in the ten coastal parishes of Louisiana. We find that since 1940, only two of the ten coastal parishes exhibited landward population movement, which we define as movement perpendicular to the shoreline, exceeding 1 km. Three parishes exhibited seaward population movement in excess of 1 km. Overall, we find very little net intra-parish landward population movement for the region. Our findings suggest that coastal Louisiana’s historical population has not moved in concert with observed shoreline encroachment. We also find a potential tipping point related to population migration when a neighborhood loses at least 50% of its land area. Our findings suggest that this lack of landward population movement could be attributable to either localized adaptation strategies or migrations to other landward areas.
KeywordsLouisiana Hurricane Katrina Sea level rise Adaptation Migration Coastal populations Landward migration
Support for RDH was provided by the National Socio-Environmental Synthesis Center (SESYNC) under funding received from the National Science Foundation (Award #DBI-1639145).
Compliance with Ethical Standards
All experiments complied with ethical standards in the USA.
Conflict of interest
The authors declare that they have no conflict of interest.
- Barras, J., Beville, S., Britsch, D., Hartley, S., Hawes, S., Johnston, J., Kemp, P., et al. (2003). Historical and projected coastal louisiana land changes: 1978-2050. United States Geological Survey.Google Scholar
- Beckman, R.J., Baggerly, K.A., McKay, M.D. (1996). Creating synthetic baseline populations. Transportation Research Part A: Policy and Practice 30 (6), Elsevier, pp 415–29.Google Scholar
- Black, R., Adger, N., Arnell, N., Dercon, S., Geddes, A., Thomas, D. (2011a). The effect of environmental change on human migration. Global Environmental Change 21, Elsevier, pp S3—S11.Google Scholar
- Black, R., Bennett, S.R.G., Thomas, S.M., Beddington, J.R. (2011b). Climate change: Migration as adaptation. Nature, 478(7370), 447–49. Nature Research.Google Scholar
- Boesch, D.F., Josselyn, M.N., Mehta, A.J., Morris, J.T., Nuttle, W.K., Simenstad, C.A., Swift, D.J.P. (1994). Scientific assessment of coastal wetland loss, restoration and management in Louisiana. Journal of Coastal Research. JSTOR, i–103.Google Scholar
- Burley, D., Jenkins, P., Laska, S., Davis, T. (2007). Place attachment and environmental change in coastal Louisiana. Organization & Environment 20 (3). Sage Publications Sage CA: Los Angeles, CA, pp. 347–66.Google Scholar
- Center, L. (2015). Resettlement as a resilience strategy: and the case of Isle de Jean Charles. Gray, LA. https://www.doa.la.gov/OCDDRU/NDRC/IDJC_Prospectus_final_27Oct15_updated_logos.pdf.
- Choupani, A.-A., & Mamdoohi, A.R. (2016). Population synthesis using iterative proportional fitting (IPF): a review and future research. Transportation Research Procedia 17. Elsevier: 223–33.Google Scholar
- Connell, J. (1990). The Carteret Islands: precedents of the greenhouse effect. Geography, 75(2), 152–54. JSTOR.Google Scholar
- Bailey, C., Gramling, R., Laska, S.B. (2014). Complexities of resilience: adaptation and change within human communities of coastal Louisiana. In: Perspectives on the restoration of the Mississippi Delta, pp. 125–40. Springer.Google Scholar
- Couvillion, B.R., Barras, J.A., Steyer, G.D., Sleavin, W., Fischer, M., Beck, H., Trahan, N., Griffin, B., Heckman, D. (2011). Land area change in coastal Louisiana from 1932 to 2010. US Geological Survey.Google Scholar
- Couvillion, B.R., Beck, H., Schoolmaster, D., Fischer, M. (2017). Land area change in coastal Louisiana (1932 to 2016). Reston, VA. https://doi.org/10.3133/sim3381.
- Gagliano, S.M., Meyer-Arendt, K.J., Wicker, K.M. (1981), Land loss in the Mississippi river deltaic plain. GCAGS Transactions.Google Scholar
- Gornitz, V. (2013). Rising seas: Past, present, Future. Columbia: Columbia University Press.Google Scholar
- IPCC. (2014). Climate change 2014: Impacts, adaptation, and vulnerability. Part a: global and sectoral aspects. contribution of working group II to the 5th assessment report of the intergovernmental panel on climate change. In Field, C.B., Barros, V.R., Dokken, D.J., Mach, K.J., Mastrandrea, M.D., Bilir, T.E., Chatterjee, M., Ebi, K.L., Estrada, Y.O., Genova, R.C., Girma, B., Kissel, E.S., Levy, A.N., MacCracken, S., Mastrandrea, P.R., White, L.L. (Eds.) Book. Cambridge: Cambridge University Press.Google Scholar
- Kahn, M.E. (2014). Climate change adaptation: lessons from urban economics. National Bureau of Economic Research.Google Scholar
- King, M. (2017). A tribe faces rising tides: the resettlement of Isle de Jean Charles. LSU. Journal of Energy Law and Resources, 6(1), 295–317. LSU.Google Scholar
- Lutz, W., Goujon, A., Smir, K., Sanderson, W. (2007). Vienna yearbook of population research. Vienna: Vienna Institute of Demography.Google Scholar
- Maldonado, J.K. (2015). Everyday practices and symbolic forms of resistance: Adapting to environmental change in coastal Louisiana. Hazards, risks and disasters in Society. Elsevier, 424p Amsterdam, The Netherlands.Google Scholar
- McLeman, R.A. (2011). Settlement abandonment in the context of global environmental change. Elsevier, 21, S108—S120.Google Scholar
- Nicholls, R.J., Marinova, N., Lowe, J.A., Brown, S., Vellinga, P., De Gusmao, D., Hinkel, J., Tol, R.S.J. (2011). Sea-level rise and its possible impacts given a ‘Beyond 4 c World’ in the 21st century. Philosophical Transactions of the Royal Society of London A: Mathematical, Physical and Engineering Sciences, 369(1934), 161–81. The Royal Society.CrossRefGoogle Scholar
- Olea, R.A., & Coleman Jr, J.L. (2013). A synoptic examination of causes of land loss in southern louisiana as related to the exploitation of subsurface geologic resources. Journal of Coastal Research, 30(5), 1025–44. Coastal Education & Research Foundation.Google Scholar
- Sastry, N. (2009). Displaced new orleans residents in the aftermath of hurricane Katrina: results from a pilot survey. Organization & Environment 22 (4). Sage Publications Sage CA: Los Angeles, CA, pp. 395–409.Google Scholar
- Simms, J.R.Z. (2016). Why would I live anyplace else?’: resilience, sense of place, and possibilities of migration in coastal Louisiana. Journal of Coastal Research 33 (2). The Coastal Education; Research Foundation: 408–20.Google Scholar
- Smith, S.K., Tayman, J., Swanson, D.A. (2006). State and local population projections: methodology and analysis. Springer Science & Business Media.Google Scholar
- Steel, T. (2011). The life and death of St. Kilda: the moving story of a vanished island community. HarperCollins UK.Google Scholar
- Thomas, K., Dean Hardy, R., Lazrus, H., Mendez, M., Orlove, B., Rivera-Collazo, I., Timmons Roberts, J., Rockman, Marcy, Warner, B.P., Winthrop, R. (2018). Explaining differential vulnerability to climate change: a social science review. Wiley Interdisciplinary Reviews: Climate Change, Wiley Online Library, e565.Google Scholar
- Titus, J.G., Hudgens, D.E., Trescott, D.L., Craghan, M., Nuckols, W.H., et al. (2009). State and local government plant for development of most land vulnerable to rising sea level along the US atlantic coast, Environmental Research Letters, 4.Google Scholar
- Yusuf, J.-E., Neill, K., Burton, S.J.III, Ash, I.K., Mahar, K. (2016). The sea is rising… but not onto the policy agenda: a multiple streams approach to understanding sea level rise policies. Environment and Planning C: Government and Policy 34 (2). SAGE Publications Sage UK: London, England, 228–43.Google Scholar