Shoreline Change Monitoring Using High Resolution Digital Photogrammetric Technique

Tuesday, 15 December 2015
Poster Hall (Moscone South)
Yushin Ahn1, Hyongki Lee2, Kyu-Han Kim3, Bum-Shick Shin3 and Kyung In Huh4, (1)Michigan Technological University, school of technology, Houghton, MI, United States, (2)University of Houston, Department of Civil and Environmental Engineering, Houston, TX, United States, (3)Catholic Kwandong University, Waterfront and Coastal Research Center, Gangwon, South Korea, (4)California Polytechnic State University Pomona, Geography and Anthropology, Pomona, CA, United States
Shoreline change has been measured with conventional surveying techniques such as Total station, GNSS, EDM etc. These measurements provide short/long term variation of nearshore evolution which enables us to estimate erosional and accretion sediment volume of the beach. This observation of ocean morphology currently has been utilized through the advance of optical imaging system and related digital image analysis. When deployed with proper viewing geometry, ground based digital imaging system can provide higher spatial/temporal resolution of shoreline change than satellite remote sensing data.

In this study, we focus on generating time series of shore line change in Gwangan/Songjung beach in Busan, Korea where two DSLR imaging station have been successfully installed nearly at the end of each beach span. Via single photo photogrammetric techniques such as lens calibration, interior/exterior orientation, feature tracking, projection toward water surface, we aim to 1) calibrate out time lapse camera system, 2) verify with conventionally observed shorelines and finally 3) quantify the trend of ocean morphology in target sites.