EM3 data of grain size from the Qianhuying profile of the Ningjinpo paleolake

This dataset provides grain-size end-member EM3 data derived from the Qianhuying fluvial–lacustrine sedimentary profile in the Ningjinpo paleolake, North China Plain. End-member modeling analysis was applied to the grain-size distributions to identify sedimentary components related to hydrodynamic variability. The EM3 component corresponds to the coarse-grained fraction and is interpreted as an indicator of paleoflood activity.

The dataset was used to reconstruct late Holocene flood events and to examine the combined influences of climate variability, river channel evolution, and anthropogenic activities on flood occurrence in the North China Plain.

The files include sediment depth and EM3 percentage values.