龚嘴水电站总溶解气体过饱和原型观测结果分析

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大坝泄水对环境的不利影响之一是会产生总溶解气体(TDG)过饱和现象,导致鱼类患气泡病甚至死亡。在理论分析的基础上,建立了基于面流消能的TDG过饱和浓度预测公式。该预测公式采用平均静水压强作为自变量进行TDG饱和度计算,避免了以往采用很难精确定量的动水压强进行TDG预测而带来的不便。通过对大渡河上龚嘴水电站泄洪期间TDG过饱和气体的原型观测,对公式参数进行了率定。所建立的公式可用于面流消能时坝下TDG过饱和度的预测。
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