This document summarizes a study that monitored topographic changes in a coastal area using remote sensing data and digital elevation models from 2002-2010. The study area was located near the Nakdong River Estuary Barrage, which was constructed in 1987 and altered sedimentation patterns in the region. Landsat and aerial imagery were used to map changes in shorelines and sandbars over time. Digital elevation models generated from aerial and terrestrial lidar surveys in 2008 and 2010 were differenced to identify areas of erosion and sedimentation. Preliminary results found changes to sandbar positions and sedimentation rates downstream of the Nakdong River Estuary Barrage after its construction.