三门峡水库运用方式对潼关高程的影响

三门峡水库修建后，潼关处于水库库区，河床淤积抬高。抬高过程与三门峡水库的运用方式及泄流规模密切相关。本文从实测资料入手，主要分析了三门峡水库控制运用以来，潼关河床高程的变化。非汛期水库高水位运行时间长，潼关河床淤积抬高，汛期冲刷历时短，溯源冲刷发展不到潼关，潼关河床得不到有效冲刷，且不利于汛期输沙，都是潼关河床抬高的主要原因。

The effect of operation of sanmenxia reservoir to tongguan bed level

After builded of Sanmenxia Reservoir, Tongguan is in the reservoir region. The bed level is rise with sedimentation. The process of the rising is closely related with reservoir operation. From the survey data, the variation of Tongguan river level after the reservoir been controlled filling is studied. The result shows, that the high-stage period of time of Sanmenxia Reservoir in non-flood season is too long, so the river bed deposit, that the erosion period time in flood season is too short , so the retrogressive erosion can not reach up to Tongguan section.