In this paper ,there has been suggested a method of optimization for calculating longitudinal dispersity of natural river,and studied longitudinal dispersion of Jueqi section in Min River.

• 提出了计算天然河流纵向离散系数的最优化方法，并用此法对岷江蕨溪段的试验数据进行处理，计算出了该段河流的纵向离散系数。