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基于王家坝至鲁台子段1975年至2005年实测水沙资料,采用计入和不计入区间来沙两种方法对王家坝至鲁台子段河道进行冲淤分析。结果表明,王家坝至鲁台子段河段整体呈淤积趋势。河道在汛期总体表现为淤积,而非汛期总体处于冲刷状态,由于汛期冲淤量较大,决定了河道的冲淤特性。日平均流量在500m3/s以下,出现频率达83.9%,河道累积表现为冲刷。流量在1000m3/s～2500m3/s之间累积淤积量最大,共淤积2950.7万t,说明河道在漫滩前后淤积比较严重。行蓄洪区运用对河段水沙运动影响较大,启用年份多年平均淤积量为311.9万t,未启用年份多年平均淤积量为164.5万t。
Based on the measured water and sediment data from Wangjiaba to Lutaizi section from 1975 to 2005, two methods were used to analyze and analyze the channel from Wangjiaba to Lutaizi section. The results show that the Wangjiaba to Lutai sub-section of the overall deposition trend. The overall performance of river courses in the flood season is siltation, while that in the non-flood season is generally in the state of erosion. Due to the large amount of scouring and silting in the flood season, the river scouring and silting characteristics are determined. The average daily flow below 500m3 / s, the frequency of 83.9%, the cumulative performance of the river erosion. The accumulated sedimentation volume between 1000m3 / s and 2500m3 / s is the largest, with a total siltation of 29.57 million tons, indicating that the sedimentation of the riverway before and after the floodplain is relatively serious. The use of flood storage area has a great influence on the runoff and sediment movement in the reach of the river, with an average of 3,190,000 tons of accumulated silt in the years of opening and an average of 1,645,000 tons of silt in years of non-use.