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Detection of shoreline changes: a geospatial data analysis in Vung Tau City, Southern Vietnam

The results showed that Vung Tau city has witnessed a massive shoreline replacement including severe erosion and gradual accretionsince 1989. CuaLap river mouth features all-time biggest changes with more than 800 meter of retreating shoreline. | TAÏP CHÍ PHAÙT TRIEÅN KH&CN, TAÄP 19, SOÁ K1- 2016 Detection of shoreline changes: a geospatial data analysis in Vung Tau City, Southern Vietnam Bui TrongVinh Ly Minh Hoang Department of Earth Resources and Environment, Faculty of Geology and Petroleum Engineering, Ho Chi Minh city University of Technology, VNU-HCMC (Manuscript Received on August 10th, 2015; Manuscript Revised on October 15th, 2015) ABSTRACT In recent years, beach and shoreline erosion has occurred increasingly around the world. Because of climate change and human activities, many beaches and shorelines have been eroded severely in Vietnam, especially in Vung Tau City. In order to understand and explain the reasons why Vung Tau beaches have been eroded, the author applied the Geographic Information System (GIS) and Remote Sensing (RS) to analyze the movement of beach in the past and present. The results showed that Vung Tau city has witnessed a massive shoreline replacement including severe erosion and gradual accretionsince 1989. CuaLap river mouth features all-time biggest changes with more than 800 meter of retreating shoreline. Keywords: beach erosion, shoreline erosion, accretion, GIS, RS, Vung Tau, Cua Lap, river mouth 1. INTRODUCTION Coastal zone is considered asone of the most dynamic environments innature, morphological variations of shoreline are strongly influenced by natural conditions and anthropogenic interventions. These changes have different manifestations in both time and space. The most important aspect of managing coastal areas is identifying the location and change of shoreline over time. Nowadays, monitoring coastal dynamics isthoroughlysupported by rapid development of geospatial technology and Geographic Information System (GIS) whereas remote sensing is effectively used to define shoreline changes with admissible accuracy. In this paper, the authorsapplied geospatial technique to carry out quantitative analysis ofshoreline change evaluations in Vung Tau .