The formula of calculating flood peak at downstream stations according to upstream flood peak at hydrometer station was proposed in this research . in the formula river boundary and flood type factors etc . were main factors and the formula can reflect the impacting factors of flood deformation 报告给出了由上游水文站洪峰流量计算下游站洪峰流量的计算公式，公式包含有河道条件和洪峰峰型因子，较全面地反映了影响洪水变形的因素。
2.
In addition according to the comparison of typical floods the impact of floodplain morphology to the flood propagation was studied . no continuous water body in main channel and floodplain and the change of floodplain morphology and the increased flood detention capacity caused the time of flood propagation increasing and the flood types changing in abnormally 同时通过对典型洪水的对比分析，研究了滩地边界条件对洪水运行的影响，认识到由于主槽与滩地水体不连续以及滩地地形的改变，滩地蓄洪能力增大，造成洪水传播时间增长和洪峰峰型的异常变化。
