Wetland shoreline recession in the Mississippi River Delta from petroleum oiling and cyclonic storms

We evaluate the relative impact of petroleum spill and storm surge on near-shore wetland loss by quantifying the lateral movement of coastal shores in upper Barataria Bay, Louisiana (USA), between June 2009 and October 2012, a study period that extends from the year prior to the Deepwater Horizon spill to 2.5 years following the spill. We document a distinctly different pattern of shoreline loss in the 2 years following the spill, both from that observed in the year prior to the spill, during which there was no major cyclonic storm, and from change related to Hurricane Isaac, which made landfall in August 2012. Shoreline erosion following oiling was far more spatially extensive and included loss in areas protected from wave-induced erosion. We conclude that petroleum exposure can substantially increase shoreline recession particularly in areas protected from storm-induced degradation and disproportionally alters small oil-exposed barrier islands relative to natural erosion.

[1]  Raymond F. Kokaly,et al.  Spectroscopic remote sensing of the distribution and persistence of oil from the Deepwater Horizon spill in Barataria Bay marshes , 2013 .

[2]  Harry H. Roberts,et al.  Drowning of the Mississippi Delta due to insufficient sediment supply and global sea-level rise , 2009 .

[3]  Irving A Mendelssohn,et al.  Response of salt marshes to oiling from the Deepwater Horizon spill: Implications for plant growth, soil surface-erosion, and shoreline stability. , 2016, The Science of the total environment.

[4]  Andrea D'Alpaos,et al.  How does vegetation affect sedimentation on tidal marshes? Investigating particle capture and hydrodynamic controls on biologically mediated sedimentation , 2010 .

[5]  J. Day,et al.  Perspectives on the Restoration of the Mississippi Delta: The Once and Future Delta , 2014 .

[6]  J. Day,et al.  Introduction: Perspectives on the Restoration of the Mississippi Delta , 2014 .

[7]  E. Robert Thieler,et al.  The Digital Shoreline Analysis System (DSAS) Version 4.0 - An ArcGIS extension for calculating shoreline change , 2009 .

[8]  Chris J. Kennedy,et al.  The value of estuarine and coastal ecosystem services , 2011 .

[9]  A. Kolker,et al.  An evaluation of subsidence rates and sea‐level variability in the northern Gulf of Mexico , 2011 .

[10]  D. FitzGerald,et al.  Hurricane-associated ebb-tidal delta sediment dynamics , 2009 .

[11]  Cathleen E. Jones,et al.  Oil Detection in a Coastal Marsh with Polarimetric Synthetic Aperture Radar (SAR) , 2011, Remote. Sens..

[12]  M. Kirwan,et al.  Tidal wetland stability in the face of human impacts and sea-level rise , 2013, Nature.

[13]  M. W. McCoy,et al.  Degradation and resilience in Louisiana salt marshes after the BP–Deepwater Horizon oil spill , 2012, Proceedings of the National Academy of Sciences.

[14]  R. Morton,et al.  Recent Subsidence-Rate Reductions in the Mississippi Delta and Their Geological Implications , 2010 .

[15]  John Day,et al.  Climate change: Protect the world's deltas , 2014, Nature.

[16]  J. Michel,et al.  Deepwater Horizon Oil Spill : salt marsh oiling conditions, treatment testing, and treatment history in northern Barataria Bay, Louisiana (interim report October 2011) , 2013 .

[17]  C. C. Watson,et al.  Restoration of the Mississippi Delta: Lessons from Hurricanes Katrina and Rita , 2007, Science.

[18]  R. Delaune,et al.  United States Gulf of Mexico Coastal Marsh Vegetation Responses and Sensitivities to Oil Spill: A Review , 2015 .

[19]  I. Overeem,et al.  Sinking deltas due to human activities , 2009 .

[20]  Bruce Chapman,et al.  UAVSAR Polarimetric Calibration , 2015, IEEE Transactions on Geoscience and Remote Sensing.

[21]  Luis Marcelo Tavares de Carvalho,et al.  Performance evaluation of several adaptive speckle filters for SAR imaging , 2008 .

[22]  B. Anderson,et al.  The rising tide: assessing the risks of climate change and human settlements in low elevation coastal zones , 2007 .

[23]  E. Nezry,et al.  Structure detection and statistical adaptive speckle filtering in SAR images , 1993 .

[24]  Donald R. Cahoon,et al.  Pattern and process of land loss in the Mississippi Delta: A Spatial and temporal analysis of wetland habitat change , 2000 .

[25]  Raymond F. Kokaly,et al.  Oil detection in the coastal marshes of Louisiana using MESMA applied to band subsets of AVIRIS data , 2015 .

[26]  J. Michel,et al.  Heavily Oiled Salt Marsh following the Deepwater Horizon Oil Spill, Ecological Comparisons of Shoreline Cleanup Treatments and Recovery , 2015, PloS one.

[27]  J. Day,et al.  Vegetation death and rapid loss of surface elevation in two contrasting Mississippi delta salt marshes: The role of sedimentation, autocompaction and sea-level rise , 2011 .

[28]  S. Penland,et al.  Relative Sea-Level Rise in Louisiana and the Gulf of Mexico: 1908-1988 , 1990 .

[29]  Giovanna McClenachan,et al.  Effects of oil on the rate and trajectory of Louisiana marsh shoreline erosion , 2013 .

[30]  J. Syvitski,et al.  Profiling risk and sustainability in coastal deltas of the world , 2015, Science.

[31]  M. Ford.  Shoreline changes interpreted from multi-temporal aerial photographs and high resolution satellite images: Wotje Atoll, Marshall Islands , 2013 .

[32]  William J. Sleavin,et al.  Land area change in coastal Louisiana from 1932 to 2010 , 2011 .

[33]  P. Knutson.  Role of Coastal Marshes in Energy Dissipation and Shore Protection , 1988 .

[34]  Mead A. Allison,et al.  An equilibrium profile model for retreating marsh shorelines in southeast Louisiana , 2008 .

[35]  A. Lopes,et al.  A statistical and geometrical edge detector for SAR images , 1988 .

[36]  Buffy M. Meyer,et al.  Oil source-fingerprinting in support of polarimetric radar mapping of Macondo-252 oil in Gulf Coast marshes. , 2014, Marine pollution bulletin.

[37]  Nicoletta Leonardi,et al.  Effect of local variability in erosional resistance on large‐scale morphodynamic response of salt marshes to wind waves and extreme events , 2015 .

[38]  Kenneth Lee,et al.  The dose-response relationship between No. 2 fuel oil and the growth of the salt marsh grass, Spartina alterniflora. , 2002, Marine pollution bulletin.

[39]  Emily E. Peacock,et al.  Long-term consequences of residual petroleum on salt marsh grass , 2008 .