风沙对黄河内蒙古河段河道淤积泥沙的影响

The Effect of Wind-blown Sand on Sediment Deposition in the Channel for Inner Mongolia Reach of Yellow River

通过黄河内蒙古河段河道淤积泥沙打钻采样,以及黄河沿岸及支流产沙地层采样分析对比,暴雨、洪水分析等,追踪河道淤积泥沙源地表明,黄河内蒙古河段河道淤积泥沙主要来源于内蒙乌兰布和沙漠及十大孔兑(沟谷)的库布齐沙漠和丘陵沟壑梁地。该河段河道淤积量通过输沙平衡法计算得知,1954～2000年该段淤积泥沙总量约20.11亿t,其中大于0.1mm的粗沙为15.57亿t,占总量的77.424%;小于0.1mm的泥沙约4.54亿t,占总量的22.57%。风成沙入黄淤积量是:乌兰布和沙漠6.06亿t;库布齐沙漠5.85亿t;二者约占大于0.1mm粗泥沙总量的76.46%。

On the basis of sample boring in the sediment deposition of channel within the Inner Mongolia Reach and by tracing sources of sediment deposition, it indicates that the sediment deposition of channel in the Inner Mongolia reach of Yellow River originates mainly from Wulanbuhe desert, ten tributaries (valleys) of Kubuqi desert and rolling/gulley terrains in comparison with or analysis of sand stratum sampling along the Yellow River and its tributaries, and storm & flood. The sediment deposition amount of the channel within this reach can be calculated and obtained from sediment discharge balanced method. The total sediment deposition amount in this reach was about 0.2011 million t in 1954 ~ 2000 years, of which (0.1557) million t for coarse sediment greater than 0.1mm, taking 77.42% of the total; 0.0454 milliont t for sediment smaller than 0.1mm, making up 22.57%.The wind-blown sediment amount into Yellow River is as follows: 0.0606 million t for Wulanbuhe desert and 0.0585 million t for Kubuqi desert, of which both deserts account for 76.46% coarse sediment greater than 0.1mm.