【摘要】：三峽庫區(qū)泥沙累積性淤積給航道的日常維護管理以及航道整治帶來了新的問題。建立了二維水沙數(shù)學(xué)模型對三峽庫區(qū)回水變動區(qū)長壽至洛磧河段的泥沙輸移進行了數(shù)值模擬。敏感性分析表明輸沙因子對泥沙淤積量影響最大。水位、流速流向和地形驗證表明:數(shù)模計算成果較好地反映了實際水文、泥沙淤積情況。計算表明:受三峽回水影響,長壽至洛磧河段發(fā)生累積性的泥沙淤積,淤積區(qū)主要位于岸線凹凸不平的彎沱、回流區(qū)及河道的寬淺河段,淤積部位主要是深槽和邊灘。淤積時間在每年的汛期6—9月份。受泥沙淤積影響,上、下洛磧和王家灘在低水位時航深不足,有礙航現(xiàn)象,建議加強監(jiān)測,及時采取整治措施。
[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.
【作者單位】： 長江重慶航道局;
【分類號】：TV149

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