水位下降对三江下航道影响及治理措施

通过对葛洲坝建坝后宜昌站的水文条件和三江下引航道泥沙冲淤变化分析,得出宜昌水位下降和设计流量下三江现有通航水深及通航能力,对潜坝的局部损失系数、壅水特性、潜坝间距及个数对水位、流速的影响等方面进行了研究,首次提出了计算潜坝群壅水的不同方法,并对整治效果进行了计算。

Effect of Falling of Water on the Lower Approach of Sanjiang River and Its Regulating Measures

In this paper, the present water depth and capacity for navigation of Sanjiang River under the designed discharge due to the falling of water at Yichang Gauge Station are obtained from the analysis of hydrology of Yichang Gauge Station and variation of erosion and deposition at the lower approach of Sanjiang River after the set-up of Gezhouba Dam. The effects of local loss coefficient, backwater behavior, and numbers and spaces of submerged dams on water level and flow velocity are studied. Different methods of calculating the backwater of submerged dams are presented, and the regulating re suits are calculated.