The Influence of Revetment Roughness on Flood Carrying Capacity in Trapezoidal Open Channel

China Rural Water and Hydropower ›› 2020 ›› (2) : 68-71.

LI Qian1 ，ZENG Yu-hong1 ，YAN Cheng-ming2 ，JIANG Bo-jie2

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Artificial turf and triangular prism brick are adopted to imitate ecological revetment, and the roughness coefficient of trapezoidal open channel flow with revetment is investigated based on the experiments conducted in an asymmetric trapezoidal flume with different flow rates and bed slopes, the influence of revetment roughness on flood carrying capacity in trapezoidal open channel under non-uniform flow and different wide-depth ratios is analyzed based on numerical simulation. The results show that，the composite roughness increases with an increase in flow depth, and conforms to the logarithmic profile, while the variation of flow rate or bed slope has no obvious effect on roughness coefficient. Under both the uniform flow and non-uniform flow, the flow depth increases with an increase in composite roughness; in the non-uniform flow, the stream-wise variation of composite roughness has the positive correlation with the stream-wise variation of water depth. The impact of revetment roughness on flood carrying capacity is obvious in the narrow and deep river while it is not significant in the wide-shallow river.

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trapezoidal open channel / ecological revetment / revetment roughness / flood carrying capacity

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LI Qian，ZENG Yu-hong ，YAN Cheng-ming ，JIANG Bo-jie. The Influence of Revetment Roughness on Flood Carrying Capacity in Trapezoidal Open Channel. China Rural Water and Hydropower. 2020, 0(2): 68-71

References

[1]JAMES C S, BIRKHEAD A L, JORDANOVA A A, et al. Flow resistance of emergent vegetation [J]. Journal of Hydraulic Research, 2004,42(4):390-398.
[2]CHENG N S. Representative roughness height of submerged vegetation [J]. Water Resources Research, 2011,47(8):1-18.
[3]PLEW D R. Depth-Averaged Drag Coefficient for Modeling Flow through Suspended Canopies [J]. Journal of Hydraulic Engineering, 2011,137(2):234-247.
[4]ABERLE J, JRVEL J. Flow resistance of emergent rigid and flexible floodplain vegetation [J]. Journal of Hydraulic Research, 2013,51(1):33-45.
[5]LUHAR M, NEPF H M. From the blade scale to the reach scale: A characterization of aquatic vegetative drag [J]. Advances in Water Resources, 2013,51:305-316.
[6]方神光, 张文明, 张康, 等. 西江中游干支流河道糙率研究[J]. 泥沙研究, 2016(2):20-25.
[7]于显亮, 彭杨, 吴志毅. 动态规划算法在河道糙率反演中的应用[J]. 中国农村水利水电, 2017(5):87-90.
[8]胡朝阳, 刘建卫, 朱林. 糙率改变对城市河道水位及堤防防洪能力的影响[J]. 水电能源科学, 2012,30(10):47-50.
[9]王光朋, 查小春, 黄春长, 等. 河道糙率系数取值变化在古洪水流量重建中的影响研究[J]. 干旱区资源与环境, 2018,32(5):19.
[10]杨岑, 路泽生, 栾维功, 等. 矩形渠道人工加糙壁面阻力规律试验研究[J]. 长江科学院院报, 2011,28(1):34-38.
[11]吴思, 赵涛, 拜亚茹, 等. 不同粗糙壁面人工渠道糙率影响因子试验研究[J]. 人民黄河, 2018,40(1):37.
[12]郑爽, 吴一红, 白音包力皋, 等.含水生植物河道曼宁糙率系数的试验研究[J]. 水利学报, 2017,48(7):874-881.
[13]韩丽娟, 曾玉红, 李明, 等.漂浮植被的阻流特性研究[J]. 华中科技大学学报(自然科学版), 2017,45(5):110-114.
[14]吴乔枫, 蔡奕, 刘曙光, 等. 基于植被分布的河道糙率分区及率定方法[J]. 水科学进展, 2018,29(6):64-71.
[15]张玮, 钟春欣, 应翰海. 草皮护坡水力糙率实验研究[J]. 水科学进展, 2007,18(4):483-489.
[16]孙东坡, 张晓雷, 张献真, 等.新型生态防洪护面连锁块的水力特性研究[J]. 泥沙研究, 2007(3):44-49.
[17]杨克君, 曹叔尤, 刘兴年. 复式河槽综合糙率计算方法比较与分析[J]. 水利学报, 2005,36(7):780-786.
[18]王涛, 郭新蕾, 李甲振, 等. 河道糙率和桥墩壅水对宽浅河道行洪能力影响的研究[J]. 水利学报, 2019,50(2):175-183.
[19]史明礼, 苏娅, 乔丛林, 等. 山区河道糙率变化规律浅析[J]. 水文, 2000,20(2):19-22.
[20]蒋书伟, 武永新. 基于 MIKE11 与 HEC-RAS 的南渡江防洪能力对比分析[J]. 中国农村水利水电, 2014(2):46-49.
[21]蒋楠, 高成. 基于 MIKE 和 HEC-RAS 模型模拟锦江水面线比较研究[J]. 中国农村水利水电, 2019(4):26-30.

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Received	Revised	Published
2019-11-01	2019-11-08	2020-02-15
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2020-08-16

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