水沙数学模型在萧山史家桥河的应用

Application of flow and sediment model in the Shijiaqiao River of Xiaoshan District

为解决萧山史家桥河河道淤积问题,提出了在整治的河道前段设置沉砂池的方案,以实现沉降泥沙,净化水质的目的。通过采用水流泥沙数学模型,在史家桥河实测水文泥沙数据和沉沙池初步设计方案等条件的基础上,模拟分析了引水后沉沙池内泥沙的运动变化规律。结果表明:引水后,沉沙池内含沙量呈现先上升后下降的趋势,且右岸的淤积较明显。该模型应用可为本区域今后沉砂池的优化及河道整治提供技术支持。

To solve the problem of channel deposition in the Shijiaqiao River due to water diversion of the Qiantang River,the design scheme with grit chamber is considered to be applied to settle the sediment and purify the water quality.Based on the actual measured hydrological data of the Qiantang River and Shijiaqiao River as well as the preliminary design scheme of grit chamber,the sediment movement in the grit chamber was simulated and analyzed using the flow and sediment model after the settling basin was established.The results showed that sediment concentration increases first and then decreases,and sedimentation on the right bank is more obvious.The research can provide technical support for the future optimization of grit chamber and river regulation project.