Diagnostic Properties of Three Sediment Cores Collected in 2021-2022 from Three Water Reservoirs Draining Contaminated Catchments after the Fukushima Daiichi Nuclear Power Plant Accident (Mano Dam, Ogaki Dam, and Yokokawa Dam)

The current dataset was compiled to investigate sediment and radiocesium transfers in three water reservoirs: Mano Dam reservoir, Ogaki Dam reservoir and Yokokawa reservoir, which were contaminated following the Fukushima Daiichi nuclear power plant accident in March 2011. This dataset contains three sediment cores, collected in 2021 in the Mano Dam reservoir and in 2022 in the Ogaki and Yokokawa reservoirs, and on potential source soils. Potential source materials include forest topsoil (n = 42), farmland topsoil (n = 56) and subsoil (subsoil material and landslide; n = 17). The dataset allows the assessment of spatial heterogeneity in sediment dynamics, erosion processes and contaminant transfer, providing insights into landscape and management influences on sediment sources and deposition patterns. Flood sediment samples were collected in November following major flood events associated with the occurrence of extreme precipitation events such as typhoons or tropical storms. The dataset consists of four CSV files containing data and metadata with variable descriptions. Recommended encoding format: latin1本数据集旨在探究2011年3月福岛第一核电站事故后受污染的三座水库——真野坝水库（Mano Dam reservoir）、大垣坝水库（Ogaki Dam reservoir）与横川水库（Yokokawa reservoir）内的沉积物与放射性铯迁移过程。 本数据集包含3根沉积岩芯：其中2021年采集自真野坝水库，2022年采集自大垣坝水库与横川水库，同时涵盖潜在源区土壤样品。潜在源物质包括森林表层土壤（n=42）、农田表层土壤（n=56）以及下层土壤（含下层土与滑坡物质，n=17）。本数据集可用于评估沉积物动态、侵蚀过程与污染物迁移的空间异质性，有助于揭示景观与管理措施对沉积物来源及沉积模式的影响。洪水沉积物样品采集于极端降水事件（如台风或热带风暴）引发的重大洪水事件后的11月。 本数据集包含4个CSV文件，其中涵盖数据与元数据，并附带变量说明。 推荐编码格式：latin1