本文分析了无闸控制溢洪道的特点，讨论了溢洪道进口段水力设计中的几个主要问题和水力计算方法。
The characteristics of an ungated overflow spillway are investigated. Some important design aspect and hydraulic computation methods for the spillway entrance zone are discussed.
针对入海水道分洪枢纽有闸控制的特点，提出了分流比的两段计算法。
According to the characteristics of gate-controlled project of Erhe River flood diversion, Two-stage Calculation Method for water diversion ratio is put forward.
通过数值模拟方法对放空洞检修闸收缩段和龙抬头竖弯段进行了优化。
Based on the numerical simulation, the check gate contraction section and the vertical-curve section of the emptying tunnel are optimized.
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