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拉萨河纳金电站具有宽约 2km的游荡型河床 ,因库区泥沙淤积严重 ,电站发电、水库防洪安全日益受到威胁。通过流场分析及模型试验研究 ,优选出冲沙闸设置的最佳方案 ,冲沙效果十分明显。将经过整治后的流场与过去的流场进行比较 ,发现过去造成泥沙淤积的大回流得以消除 ,从而取得稳定河势和冲淤平衡 ,进而提高库区的防洪能力 ,为电站长期安全可靠运行提供保障
The Lhasa River Nakin Power Station has a wandering 2km-wide riverbed, which is threatened by the heavy siltation in the reservoir area and the generation of power plants and reservoir flood control. Through the flow field analysis and model test research, the best scheme of setting flushing sluice gate is optimized, and the flushing effect is very obvious. Comparing the flow field after remediation with the flow field in the past, it was found that the large backflow that caused the sedimentation in the past was eliminated, so that the stable river regime and scouring and silting balance could be obtained, and the flood control capacity of the reservoir area could be improved. Operation to provide protection