黄河内蒙古河段冲淤量评估

通过实测断面资料、来沙量资料和同流量水位的变化等,对黄河内蒙古河段的冲淤量分别进行了估算,其结果基本一致。综合分析表明,1986-2004年内蒙古三盛公—头道拐河段年均淤积量为0.616亿t是基本可靠的,而主槽的淤积量占全断面的80%以上。总体看,这一数值可以反映1986年龙羊峡水库运用以来内蒙古河道的淤积情况。

Evaluation on the Volume of Scour and Fill of Inner Mongolia Section of the Yellow River

The paper calculates the volume of scour and fill of the Inner Mongolia section of the Yellow River respectively through the observed data of cross sections,coming sediment and variations of water level with same discharge and the results are basically the same.The comprehensive analysis shows that the annual mean fill of 61.6 million tons occurred in Sanshenggong Toudaoguai Section in Inner Mongolia during 1986~2004 period is basically reliable and the main channel fill makes up more than 80% of the whole section.Viewing the overall condition,this numerical value can reflect the fill condition of Inner Mongolia section since the Longyangxia Reservoir putting into operation in 1986.