引江济汉工程渠首泥沙淤积及预测研究
Research on Sediment Deposition and Predictions on the Headwork of the Yangtze River to Han River Project

引江济汉工程渠首为典型“盲肠河段”，口门环流导致泥沙落淤，抬高引水口底板高程，影响渠道引水条件，因此需定期进行渠道进口清淤维护。为研究工程运行后渠首渠道输水输沙规律，采用河演分析及建立平面二维水沙数学模型方法研究表明：工程自运行以来，口门存在逆时针回流，渠首呈累积性淤积态势，渠首未来10年泥沙淤积量约43.89万m3，研究结果可为工程管理单位进行工程运行、维护和改造提供技术支撑。
The headwork of the Yangtze River to Han River Project is a typical “cecal reach”, and a circulating flow at the channel mouth causes sediment deposition and elevates the inlet, affecting the inlet flow condition. Therefore, regular dredging is necessary for the safety of the headwork. A two-dimensional flow sediment transport bed morphology mathematical model and the analysis method of fluvial process are adopted to analyze the law of water-sediment transport. Analysis shows that the headwork kept silting along with a counterclockwise backflow at the entrance. There will be 438,900 cubic meters sediment siltation in the next 10 years. The research can provide technical support for engineering operation, maintenance, and renovation for the project management.