对水电站坝体廊道内潮湿状况进行了较全面的理论分析。对利用通风法排湿的应用条件及控制参数进行了讨论，对排湿的具体措施提出了方向性的建议。 A comprehensive theoretical analysis of the wet conditions in the dam gallery of hydropower stations was carried out. The application conditions and control parameters of the dehumidification using the ventilation method were discussed, and the directional recommendations for the specific measures for dehumidification were proposed.