“揭河底”沖刷期龍門—潼關河段的水沙響應
[Abstract]:Based on the analysis of the high sediment flood in Longmen Station and Tongguan Station of the Yellow River in the past years, the flood season water and sediment amount of Tongguan Station in the period of "uncovering the river bottom", the water and sediment quantity of 3 days in Hong Feng period, the amount of water and sediment at the stage of "uncovering the river bottom", the amount of water and sediment Response relationship between sand peak and sediment particle size in Hong Feng period and Longmen station. The results show that the response of water volume in flood season of Longmen-Tongguan is good, the sediment quantity in flood season is attenuated obviously, and the sediment reduction range of high sediment bearing flood is larger than that of general sediment content flood. In Hong Feng period of Tongguan station, the amount of water and sediment is smaller than that in Longmen station, and the amount of water and sediment in 3 days of flood of "uncovering river bottom" is larger than that of "unfurling river bottom" flood. For a process of high sediment flood, the discharge and sediment content will decrease along the average, and the reduction of long distance "open river bottom" scour flood is smaller than that without "open river bottom" scour flood. In recent years, the decreasing amplitude of sediment content along local "river bottom" scouring flood has increased obviously, and the median particle size of sediment in Hong Feng period of Tongguan Station is much smaller than that in Longmen Station. However, the grain size of the flood sediment scouring in a long distance is low, which is very unfavorable to the scouring and silting of Sanmenxia Reservoir area and the lower Yellow River.
【作者單位】: 黃河水利科學研究院水利部黃河泥沙重點實驗室;
【基金】:國家自然科學基金資助項目(51209101) 中央級公益性科研院所基本科研業(yè)務費專項(HKY-JBYW-2013-01) 水利部公益性行業(yè)科研專項(201101009)
【分類號】:TV147
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