Abstract
Grain size is a key physical property of sediments, critical for reflecting their origin, transport, and depositional environments. However, the methods to calculate sediment grain size parameters are not standardized, affecting data integration and application. This study addresses the gap in comparative analysis between the graphical and moment methods in Gonghe Basin. By analyzing the YQ loess profile in Gonghe Basin, it establishes a conversion relationship between these methods and identifies the more suitable method for Gonghe loess based on their principle differences and sediment characteristics. Key findings include: (1) the moment method, aligning with Gonghe loess's sedimentary features, provides better-suited grain size parameter results due to its principle and the loess's properties; (2) the moment method shows Gonghe loess has moderate kurtosis and positive skewness, typical of aeolian sediments, affected by diverse sources and dynamic forces, with variations in transport and kinetic energy, especially during phases of high aeolian activity.
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