태안 해역 수중 문화유산의 보존 가능성 예측을 위한 Kriging 및 IDW 기반 공간분석 연구 = A Geostatistical Study on Predicting the Preservation Potential of Underwater Cultural Heritage in the Taean Coastal Waters Using Kriging and IDW Methods

다국어 초록 (Multilingual Abstract)

The Taean coastal waters, a key route for transport and trade during the Goryeo and Joseon Dynasties, contain numerous shipwrecks and submerged cultural heritage sites. This study quantitatively assesses and spatially visualizes the preservation potential of submerged wooden cultural heritage in this area by integrating sedimentological and geostatistical analyses. Sediment samples collected from the Taean seabed were analyzed for mean grain size, sorting, skewness, and Folk textural classification. Based on these parameters, a weighted scoring system was developed to quantify preservation potential (mean grain size = 50%, sorting = 25%, skewness = 20%, texture = 5%), reflecting that fine-grained, poorly sorted, and positively skewed sediments correspond to higher preservation potential. Using these scores, two spatial interpolation methods—Kriging and Inverse Distance Weighting (IDW)—were applied to generate preservation potential maps across the study area. The results indicate no areas exceeding 80 points, with generally low potential (0–40) in northern offshore regions and medium to high potential (approximately 60) in southern coastal and pocket-type basins. In particular, the semi-enclosed southern basins dominated by silt mud sediments represent optimal anoxic environments favorable for the long-term wooden heritage preservation. Validation using core samples from the Taean Mado No.
3 shipwreck yielded scores of 66.1–72.7, confirming the model’s reliability in predicting real preservation conditions. This study presents a reproducible, data-driven framework that integrates sedimentological indicators and geostatistical modeling to support predictive mapping and prioritization in underwater cultural heritage management.