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1 概况三门峡水库1960年9月开始蓄水运用,水库运用初期,由于水库运用水位较高,库区发生严重淤积,潼关高程急剧抬升,回水影响到渭河下游的赤水河口。后经两次改建并于1973年底开始采用蓄清排浑运用方式。1974～1985年入库水沙条件与水库运用方式比较适应,潼关高程保持相对稳定。1986年以后,由于龙、刘水库调蓄运用的影响,上、中游沿河工农业用水的增加及降雨偏少等原因,汛期入库水量大幅度减少,年内水量过程趋于均匀,致使潼关高程持续抬升,1995年以后,潼关
1 Overview Sanmenxia Reservoir began its water storage operation in September 1960. During the initial period of reservoir operation, due to the high water level in the reservoir and serious siltation in the reservoir area, the elevation of Tongguan Station was dramatically raised and the backwater affected the Chishui River estuary in the lower reaches of the Weihe River. After two alterations and the beginning of the end of 1973 the use of clearing and discharging muddy way. The conditions of water and sediment storage in 1974-1985 were more suitable for reservoir operation, and the elevation of Tongguan remained relatively stable. After 1986, due to the impact of the regulation and storage of Long and Liu Reservoirs, the increase of industrial and agricultural water along the rivers in the upper and middle reaches and the less rainfall, the inflow of water in the flood season decreased drastically. During the year, the water volume tended to be even, resulting in the elevation of Tongguan Continued to rise, after 1995, Tongguan