摘要
为研究渠道水生植被特征对渠内水力特性影响,设计了渠道模型试验,探讨了植被生长间距、入渠流量等因素影响下渠道水位、流速变化。试验表明,入渠流量对渠内断面水位变化特征影响较小,但植被生长间距特征会改变渠内断面水位变化,在间距为10~15、20~30、35~40 mm 3个区段具有不同的水位变化趋势。入渠流量愈大,则水位愈高;但植被生长间距愈大,则渠内水位愈低。当植被生长间距不超过25 mm时,渠内流速变化具有增、降阶段,而在间距为30~40 mm时流速较稳定。植被生长间距愈大,则流速愈高。研究认为渠内水生植被应控制其分布密度与间距,以降低水生植被对渠内动水势能的影响。
In order to study the influence of aquatic vegetation characteristics on hydraulic characteristics in channels,channel model experiments were designed and conducted to explore the changes in channel water level and flow velocity under the influence of factors such as vegetation growth spacing and inflow flow rate.Experiments have shown that the flow rate into the canal has a relatively small impact on the water level changes in the cross-section of the canal,but the vegetation spacing will change the water level changes in the cross-section of the canal.There are different water level change trends in the intervals of 10~15,20~30 and 35~40mm,respectively.The larger the inflow into the canal,the higher the water level,but the larger the spacing between vegetation growth,the smaller the water level in the canal.When the spacing between vegetation growth does not exceed 25 mm,the flow velocity changes in the channel have an increasing and decreasing stage,while the flow velocity is relatively stable at a spacing of 30~40 mm;The larger the spacing between vegetation growth,the higher the flow velocity.Research suggests that the distribution density and spacing of aquatic vegetation in the canal should be controlled to reduce the impact of aquatic vegetation on the dynamic water potential energy in the canal.
作者
姚刚
YAO Gang(Xujiaya Reservoir Management Center,Feixian County,Linyi 273400,China)
出处
《海河水利》
2024年第4期91-95,共5页
Haihe Water Resources
关键词
植被生长特征
渠道
流速
水位
vegetation growth characteristics
channels
current speed
water level
