中文摘要：

应用平均水深有限元法平面二维水流数学模型，以景供电站大坝泄流为例，采用流场一致判别标准，分析了大坝全断面泄流和分散泄流坝后流场的变化情况和流速的分方．得到了大坝分散泄流与全断面泄流流场趋于一致的最大沿程距，建立了泄流流量与最大沿程距间的关系式，确保汛期船舶的行船安全情况下，为大坝孔口泄流提供科学依据．

英文摘要：

Based on flood discharge of Jinghong Power Station,the horizontal 2-D depth- averaged flow mathematics model on the basis of the finite element method was used in this paper. Flood discharge considered two scheduling mode： full sec- tion and dispersion. Consistent flow field was selected to be the standard in analyzing the change of flow field below dam and velocity distribution below dam of both cases. With flow field consistent of two cases, the maximum distance along the river was got, and the relationship for discharge and the maximum distance along the river was derived. Under the situation of the safety of ship sailing in flood period, the scientific basis for flow discharge through dam orifice is provided in this pa- per.