直角折线堰在生态河道中的应用研究

通过模型试验,研究直角折线堰不同前堰、侧堰长度的变化情况下的过流能力和过堰水流形态。直角折线堰作为亲水设施,当前堰、侧堰长度以及展长变化不大时,其过流能力相差仅为10%左右,对河道的行洪安全没有根本性的影响;不同的前堰、侧堰长度变化情况下,过堰水流在堰顶、堰后的水舌形态以及下游水流跌落后所形成的水冠均有着较为明显的差异,将其进行不同的组合布置,客观上使得过堰水流相互交错、水股相击,能够营造出和谐美丽的生态氛围。

Application of Right Angle Folded Line Weir in Ecological River Channels

Through the model test,the overcurrent capacity and the flow pattern of cross-weir with different lengths of front and side weir were analyzed.As a hydrophilic facility,when the length of front weir,side weir and spread weir change little,the difference in its overflow capacity is only about 10%,there is no fundamental impact on the flood safety of the river;Under the condition of different length of front weir and side weir,there are obvious differences in the shape of water tongue at the top and back of weir and the water crown formed after the downstream flow falls,and the arrangement of different combinations makes the water flow interlacing each other and the water strands hit each other objectively,which can create a harmonious and beautiful ecological atmosphere.