非汛期流量小 ,悬移质及河床泥沙颗粒组成变粗 ,是潼关河床淤积的基本原因 ;凌汛期冰情加重 ,潼关以下河道流冰搁浅堆积 ,以及冰塞壅水上延 ,导致河床淤积增多 ,是非汛期潼关高程升幅最大的运用时期 ;桃汛对潼关河床有明显的冲刷作用 ,适当降低起调水位 ,能改善淤积分布状况 ,增大洪水冲刷效果 ,降低潼关高程 ;水库高位蓄水加重了河床淤积 ;河道输沙条件对潼关高程上升起着制约作用。 In the non-flood season, the flow is small, the suspended sediment and the sediment particles in the riverbed become thick, which is the basic reason for the siltation in the Tongguan riverbed. The aggravating ice conditions in the flood season, the aggradation of ice and ice in the river below Tongguan, , Which is the maximum period of application of Tongguan elevation in the non-flood season. The peach floods have obvious scouring effect on the Tongguan riverbed, appropriately lowering the water diversion level, improving the siltation distribution, increasing the flood scouring effect and lowering the elevation of Tongguan reservoir; Riverbed siltation; river sediment transport conditions on the elevation of Tongguan plays a regulatory role.