Flood data sequences are characterized by randomness

nonlinear

uncertainty

and similarity.The characteristics are consistent with the study object of the fractal theory

so flood can be staged using fractal theory.Taking Xiangjiang River basin as an example

flood season of Xiangjiang River basin is staged through analyzing flood data sequences of Xiangtan staff gauge station

computing capacity dimension

and determining the number of flood season staged.The new method is then compared with the traditional method of flood season staged.It is revealed that the stages of Xiangjiang river basin determined by using fractal theory are consistent with those from traditional method

but the method using fractal theory is much more objective.It is feasible in flood season staged and needs to be discussed and applied further.