潼关高程及三门峡水库运用方式问题探讨

Study on the issues of Tongguan elevation and Sanmenxia reservoir operation modes

作者对潼关高程从三门峡水库“蓄清排浑”运用以来的变化进行了分析 ,指出潼关高程近年来不断上升的主要原因是由于汛期来水量大幅度减少所致。要控制和降低潼关高程 ,必须调整三门峡水库的运用方式来适应新的来水来沙条件。建议非汛期最高运用水位控制在 3 1 6～ 3 1 8m ,汛期敞泄排沙流量减小到 1 0 0 0～1 5 0 0m3 s,桃汛起调水位 3 1 3m ,6月上旬运用水位降至 3 1 0m。

Analysis has been made for variation of Tongguan elevation since the operation mode of “storing clear water and releasing the muddy' of Sanmenxia Reservoir. The main cause of the continuous rising of Tongguan elevation in recent years is the rapid reduction of the incoming runoff during flood season. To control Tongguan elevation, it is necessary to adjust the operation mode of Sanmenxia Reservoir to suit new inflow condition. In non-flood season, the water level at the dam should be controlled below 318m. In flood season, the flow-rate limit of opening all outlets to discharge sediment should be reduced to 1000～1500m 3/s,. The beginning water level prior to ice-melt flood should be lowered to 313m. In the first ten-days period of June, the water level should be lowered to 310m.