流量对单排插板透水丁坝促淤效果的影响

为研究流量对单排插板透水丁坝促淤效果的影响，确定插板透水丁坝促淤效果最优的流量条件，采用CCHE2D模型对单排插板透水丁坝坝后淤积区形状、坝后最大淤积长度、坝后最大淤积宽度、坝后最大淤积高度及坝后淤积面积随流量变化的规律进行数值模拟。结果表明，当流量为524~950 m3/s时，插板透水丁坝坝后淤积区平面及纵断面形状特点相似且促淤效果较其他流量条件较好；当流量在120.95~1 750 m3/s范围内，随着流量增大，坝后最大淤积长度、坝后最大淤积宽度、坝后淤积面积先增大后减小且均在流量为737 m3/s时达到最优。

Influence of Flow Discharge on Deposition Promotion Effect of Permeable Sheet Piling Spur Dike

In order to study the influence of flow discharge on deposition promotion effect of permeable sheet piling spur dike and determine its optimal flow conditions, the law of shape of deposition, the maximum deposition length, the maximum deposition width, the maximum deposition height and the deposition area behind the dike changed with flow discharge were simulated based on CCHE2D model. The results show that the promoting deposition effect is better than other flow conditions and the deposition area shape characteristics of the plane and vertical section behind the permeable sheet piling spur dike are similar when the flow discharge is in the range of 524 m3/s to 950 m3/s. When the flow discharge is in the range of 120.95 m3/s to 1 750 m3/s, the maximum deposition length, the maximum deposition width, the deposition area behind the dike increased first and then decreased with the increase of the flow discharge. They all reach the optimum when the flow discharge is 737 m3/s.