Multi-decadal Spatio-temporal shoreline changes along the Colombian pacific
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1
The National University of Colombia, Palmira Campus, Department of Engineering, Colombia
Regular monitoring of shorelines are significantly important to evaluate coastal dynamics and to develop knowledge-based decisions support for coastal management strategies. We studied multi-decadal shoreline changes along Buenaventura, an important and most populated port city along the pacific coast of Colombia. The 156 km shoreline (Figure 1) was extracted using multidate Landsat data (1986, 2001 and 2015) and were analyzed using Digital Shoreline Analysis System (DSAS), a geospatial tool developed by the United States Geological Survey (USGS). Changes were estimated using statistics on Net Shoreline Movement (SNM), End Point Rate (EPR) and Linear Regression Rate (LRR). The maximum shoreline changes in terms of erosion and accretion were 21.2 and 26.92 m respectively (Figure 2). Most advanced processes of accretion were determined near La Concepción beach and Chavica along the north part of Buenaventura bay. Locations with most advanced processes of erosion were around El Chocho beach and Malaga bay, also located along the northern part of Buenaventura. In areas of Juanchaco and Buenaventura bay, small scale erosion processes were identified (Figure 3). However, some parts of the shoreline remain unchanged like in the port of Buenaventura and close to La Playita. We concluded that both natural processes along with some urban expansion and deforestation contributed to these shoreline changes. The study also demonstrates the viability of time series Landsat data in the monitoring of shoreline dynamics.
Acknowledgements
The authors would like to acknowledge the National University of Colombia research funding (SIUN)
Keywords:
Landsat data,
Colombian Pacific,
erosion,
accretion,
DSAS,
shoreline change
Conference:
IMMR | International Meeting on Marine Research 2016, Peniche, Portugal, 14 Jul - 15 Jul, 2016.
Presentation Type:
Poster presentation
Topic:
Biodiversity, Conservation and Coastal Management
Citation:
Cifuentes Ossa
M,
Rosero Henao
L and
Selvaraj
J
(2016). Multi-decadal Spatio-temporal shoreline changes along the Colombian pacific.
Front. Mar. Sci.
Conference Abstract:
IMMR | International Meeting on Marine Research 2016.
doi: 10.3389/conf.FMARS.2016.04.00094
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Received:
05 May 2016;
Published Online:
13 Jul 2016.
*
Correspondence:
Dr. John Josephraj Selvaraj, The National University of Colombia, Palmira Campus, Department of Engineering, Palmira, Valle del Cauca, Colombia, jojselvaraj@unal.edu.co