水头：液体恒元流的能量方程是按照任意点参考坐标平面以上的几何高度来计算的，其中压强、流速、能量损失都是按照此种方法来计算，故总的能量可用大致总水头来概括。总水头一般分别由位置水头、压强水头、流速水头、损失水头来计算。设计水头：是指在施工设计时坝前可到达的最高水头位置。
高坝洲水电站由于设计水头较高，设计单位建议采用预应力钢筋混凝土蜗壳。
Due to the high water head of the GHS, the design unit put forward a suggestion of using the pre stressed reinforced concrete spiral case.
如将设计水头提高到37.0米，水轮机发电机出力增容到5.0万千瓦是合理的。
When the design head was 37. Om, the electricity generated by turbine generator increased to 5.0 million KW, which was relatively reasonable.
尽管构皮滩电站的水头变幅并不大，但最高效率要求较高，而且设计水头附近横向权值大。
Though the range of water head is not too wide, maximum efficiency of Goupitan hydroelectric plant is very high and weighted efficiency focus on rated head wide range in flow.
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