In this study, traditional 137 Cs reference inventory (CRI) acquiring methods were summarized first, and then a new complex scheme was established, involving 7 core steps and coupling the model estimate and sample measurement. The above CRI
determination methodology was implemented in the central-eastern Inner Mongolia Plateau. According to the new CRI determination scheme, temporal remote-sensing-based land use/cover history is deduced, field measured values and model simulated values are compared
, and the soil erosion/deposition process analysis emphasized. The newly proposed CRI determination scheme was proved effective, and the determined CRI plots and CRI values were convincing. The methodology offered a framework for 137Cs tracing studies in large