A study on hydro-geomorphological system using radioactive nuclides

湖泊流域系统的地貌变化可以为阐明地貌过程和地貌历史之间的关系提供深入的见解。在这些研究中，大规模运动的示踪剂和年代测定工具（Cs-137 和 Pb-210_<exc>）是不可避免的。沉积物物性和Pb-210_<exc>浓度的变化与地貌变化密切相关。表层中的 Cs-137 浓度与地表侵蚀过程有关，湖泊沉积物中的 Pb-210_<exc> 和 Cs-137 可用于沉积物测年。系统中的短期观测和分析揭示了过程（强降雨事件、地震等）与沉积物信息之间的某些关系，为寻找地貌演化的长期因果关系提供了线索。

Landform changes in lake-catchment systems may give a great insight into clarifying the relationship between geomorphic processes and geomorphic histories. Tracers and dating tools for mass movement(Cs-137 and Pb-210_<exc>) are inevitable in these studies. Changes in physical properties and Pb-210_<exc> concentration of sediments are closely related to geomorphic changes. Cs-137 concentration in surface layers is connected to surface erosional processes and Pb-210_<exc> and Cs-137 of lake sediments are available for sediment dating. Short-term observation and analyses in the systems reveal some relationship between the processes(heavy rainfall event, earthquake, etc.) and sediment information, suggesting clues to find long-term causal relations in land form evolutions.