The change of tidal surface sediment facies using high resolution remote sensing by GIS analysis

The surface sediment distribution in a tidal flat in early 2000s was compared with that of recent years using high spatial resolution remote sensing images and a GIS-based analysis. Maps of the surface sedimentary facies for each timeframe were induced by an IKONOS data acquired in 2001 and a KOMPSAT-2 data acquired in 2008 using an object-based classification method. The spatial relationships between the spectral reflectance of the satellite images and each surface sediment facies were quantitatively estimated. The result showed that the percentage of grains larger than very fine sand (0.0625 mm) has increased considerably since the early 2000s in the study area, Hwang-Do tidal flat, Korea. A field campaign also supported the result.