同位素示踪技术已成为全球环境变化研究的重要手段，可以为评价湖泊当前环境质量以及预测未来环境变化提供科学依据。本项研究基于环境放射性核素（137Cs和210Pbex）计年技术，以云南高原湖泊- - 抚仙湖为研究对象，根据137Cs和210Pbex两种核素在沉积物剖面中的垂直分布特征，建立两种核素计年结果存在差异性的修正模型，获得抚仙湖过去百余年来的沉积速率变化趋势，深入分析特定历史时期自然因素和人类活动双重作用对抚仙湖沉积环境变化的影响。此项研究不仅对提高放射性核素（137Cs和210Pbex）计年结果的精确性具有重要的理论意义，而且对湖泊环境治理和科学管理等具有重要的实践意义。

So far, the technique of isotope tracer has been become an important means for studying the global environmental changes, which can be provide an important scientific basis for assessing the current environmental qualities and predicting the future environmental changes in some degree. In this study, Lake Fuxian of the Yunnan-Guizhou Plateau will be selected as the target by environmental radionuclides (137Cs and 210Pbex) datings, with the vertical distributions of 137Cs and 210Pbex in the cores, trying to establish a corrected model for eliminating the error from the two dating results. It is very useful for obtaining more accurate sedimentation rates in the past 150 years, and for further analyzing the impact on sedimentary environmental changes from natural factors and human activities during the period of history in the Lake Fuxian Basin. This study not only to improve the accuracy results of 137Cs and 210Pbex datings for estimating lake sedimentation rates, but also to have an very important practice significance to manage and control scientifically the environmental qualities of the Lake.