This paper deals with the characteristics of incoming water and sediment and changes of Tongguan elevation since Sanmenxia Reservoir began its storing clear water and releasing sediment operation mode.

• 本文阐述了三门峡水库“蓄清排浑”运用以来入库水沙的特性和潼关高程的变化，对潼关高程非汛期升高、汛期降低的基本规律进行了分析。