A study on hydro-geomorphological system using radioactive nuclides

湖泊-集水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重要的信息。在这些研究中，物质运动的示踪剂和定年工具（Cs-137和Pb-210<exc>）是必不可少的。沉积物物理性质和Pb-210_2含量的变化<exc>与地貌变化密切相关。表层Cs-137含量与地表侵蚀过程有关，<exc>湖泊沉积物中Pb-210_2和Cs-137可用于沉积物定年。对系统的短期观测和分析揭示了这些过程（暴雨事件、地震等）之间的某种联系。和沉积物的信息，提供线索，以寻找长期的因果关系，在土地形成的演变。

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.