The fractal theory and the computation of capacity dimension are introduced in this paper, taking the Yichang gauging station of Three Gorges Reservoir as an example, and by using the traditional statistics method and the dynamic fractal dimension method.

• 介绍了分形理论及容量维数的计算方法，以三峡水库宜昌站为例，利用传统统计学法和动态分维数法，确定了洪水分期数目，并计算了各分期的容量维数，从而最终确定三峡水库的洪水分期。