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1 概述2003年黄河发生严重秋汛,渭河、伊河、洛河、沁河相继出现多次洪水过程。9月上中旬,借助小浪底水库开展了基于空间尺度的黄河调水调沙试验。从泥沙颗粒变化情况分析,整个试验过程,悬移质泥沙平均中数粒径沿程变粗,各断面悬移质泥沙颗粒级配中粗沙所占比重增加,细沙中的极细沙所占比重相应减少,总体呈粗化趋
1 Summary In 2003 the Yellow River suffered a serious autumn flood, Weihe River, Yi River, Luohe, Qinhe flood occurred several times in succession. In mid-September, with the help of Xiaolangdi Reservoir, a trial of water and sediment adjustment of the Yellow River based on spatial scales was carried out. From the analysis of the change of sediment particles, throughout the experiment, the average median particle diameter of suspended sediment becomes thicker, and the proportion of coarse sand in suspended sediment particle size of each section increases, while in the fine sand The proportion of fine sand correspondingly reduced, the overall trend is coarsening