本文对平原水库泄水涵洞的进水口水头损失和闸门处流量系数进行分析 ,提出了涵洞进水口水头损失和闸门处流量系数的经验公式 ,推导并总结了由平板闸门控制的泄水涵洞流量系数公式。并提出了计算了泄水涵洞流量的流程图。 This paper analyzes the water head loss and the flow coefficient at the gate of the culvert culvert in the plain reservoir and puts forward the experiential formula of the head loss at the inlet of the culvert and the flow coefficient at the gate, deduces and summarizes the drainage culverts controlled by the slab gate Flow coefficient formula. And put forward a flow chart calculated the discharge of culverts.