海洋地质与第四纪地质2026，Vol.46Issue(4)：69-79,11.DOI:10.16562/j.cnki.0256-1492.2025102301
基于粒度组成数学变换方法的海底沉积物类型图编制
Seabed sediment-type mapping based on mathematical transformations of grain-size composition:A case study of the Yangtze River Estuary-East China Sea Shelf
摘要
Abstract
To address current limitations in sediment-type mapping and to achieve unbiased geostatistical inference of sediment composition,we developed and validated a standardized"Composition-Classification"mapping workflow based on grain-size composition data from about 3 200 surface sediment samples taken from the Yangtze River Estuary-East China Sea shelf.The sand-silt-clay percentage data were transformed first using the additive log-ratio(ALR)transformation,followed by empirical Bayesian kriging(EBK)interpolation in the transformed space.An unbiased Monte Carlo(MC)back-transformation was then applied to recover the continuous spatial distribution of each component.At last,Folk's classification scheme was used on a cell-by-cell basis to produce posterior mean-probability and maximum-probability sediment-type maps.The workflow simultaneously outputs several diagnostic measures of uncertainty,including maximum class probability,probability difference(ΔP)and normalized entropy(Hn).Results show that the method could inherently satisfy non-negativity and closure constraints,and yield sediment-type maps with smooth spatial transitions and highly consistent spatial patterns in the diagnostic indices.Meanwhile,it robustly delineated high-confidence areas while identified low-confidence zones that require further optimization.The proposed method also supported rapid remapping to different management units,providing a technical support for marine resource exploration and environmental management.关键词
粒度组成/ALR 变换/EBK/MC 无偏回变/Folk 分类/长江口-东海陆架Key words
grain-size composition/additive log-ratio(ALR)transformation/Empirical Bayesian Kriging(EBK)/Monte Carlo unbiased back-transformation/Folk classification/Yangtze River Estuary-East China Sea shelf分类
海洋科学引用本文复制引用
高飞,曹珂,印萍,苗庆生,张子健,潘顺琪..基于粒度组成数学变换方法的海底沉积物类型图编制[J].海洋地质与第四纪地质,2026,46(4):69-79,11.基金项目
山东省自然科学基金资助项目"冬季黄海切变锋生成、演化规律及其沉积效应"(ZR2022MD105) （ZR2022MD105）
自然资源部研究式调查项目"基于数值模拟的舟山渔山岛海域围填区冲淤演化过程研究"(2024ZRYJDC010) （2024ZRYJDC010）
中国地质调查局地质调查项目"长江口海岸带地质环境调查与监测"(DD20242714) （DD20242714）
