三峡回水变动区长寿-洛碛河段水沙数值模拟
发布时间：2018-12-06 22:08
【摘要】：三峡库区泥沙累积性淤积给航道的日常维护管理以及航道整治带来了新的问题。建立了二维水沙数学模型对三峡库区回水变动区长寿至洛碛河段的泥沙输移进行了数值模拟。敏感性分析表明输沙因子对泥沙淤积量影响最大。水位、流速流向和地形验证表明:数模计算成果较好地反映了实际水文、泥沙淤积情况。计算表明:受三峡回水影响,长寿至洛碛河段发生累积性的泥沙淤积,淤积区主要位于岸线凹凸不平的弯沱、回流区及河道的宽浅河段,淤积部位主要是深槽和边滩。淤积时间在每年的汛期6—9月份。受泥沙淤积影响,上、下洛碛和王家滩在低水位时航深不足,有碍航现象,建议加强监测,及时采取整治措施。
[Abstract]:The accumulation of sediment in the three Gorges Reservoir area brings new problems to the daily maintenance and management of the waterway and the regulation of the waterway. A two dimensional mathematical model of water and sediment was established to simulate the sediment transport from Changshou to Luodan River in the backwater variation area of the three Gorges Reservoir area. Sensitivity analysis shows that sediment transport factors have the greatest influence on sediment deposition. The verification of water level, velocity direction and topography shows that the results of mathematical model well reflect the actual hydrology and sediment deposition. The calculation results show that the accumulation of sediment in the reach of Longshou to Luo-moraine occurs under the influence of the backwater of the three Gorges. The siltation area is mainly located in the uneven bend of the shoreline, the backflow area and the wide and shallow reach of the river, and the silt is mainly located in the deep trough and the edge beach. The siltation time is in June-September of the flood season of each year. Under the influence of silt deposition, the upper, lower luo moraine and Wangjiatan have insufficient navigation depth when the water level is low, which hinders navigation. It is suggested that the monitoring should be strengthened and the remedial measures should be taken in time.
【作者单位】： 长江重庆航道局;
【分类号】：TV149
本文编号：2366731
[Abstract]:The accumulation of sediment in the three Gorges Reservoir area brings new problems to the daily maintenance and management of the waterway and the regulation of the waterway. A two dimensional mathematical model of water and sediment was established to simulate the sediment transport from Changshou to Luodan River in the backwater variation area of the three Gorges Reservoir area. Sensitivity analysis shows that sediment transport factors have the greatest influence on sediment deposition. The verification of water level, velocity direction and topography shows that the results of mathematical model well reflect the actual hydrology and sediment deposition. The calculation results show that the accumulation of sediment in the reach of Longshou to Luo-moraine occurs under the influence of the backwater of the three Gorges. The siltation area is mainly located in the uneven bend of the shoreline, the backflow area and the wide and shallow reach of the river, and the silt is mainly located in the deep trough and the edge beach. The siltation time is in June-September of the flood season of each year. Under the influence of silt deposition, the upper, lower luo moraine and Wangjiatan have insufficient navigation depth when the water level is low, which hinders navigation. It is suggested that the monitoring should be strengthened and the remedial measures should be taken in time.
【作者单位】： 长江重庆航道局;
【分类号】：TV149
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