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Journal of Irrigation and Drainage Engineering最新文献

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Reducing Sediment Deposition on Columned Vortex-Settling Basin Floor by Installing Vanes 安装叶片减少柱状旋涡沉淀池底泥沙淤积
IF 2.6 4区 工程技术 Q3 AGRICULTURAL ENGINEERING
Journal of Irrigation and Drainage Engineering
Pub Date : 2022-12-01 DOI: 10.1061/(asce)ir.1943-4774.0001734
Yuan Wang, Yiyi Ma, Lin Li
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引用次数: 0
Discussion of “Comprehensive Evaluation of Machine Learning Techniques for Hydrological Drought Forecasting” by Muhammad Jehanzaib, Muhammad Bilal Idrees, Dongkyun Kim, and Tae-Woong Kim 关于Muhammad Jehanzaib、MuhammadBilal Idrees、Dongkyun Kim和Tae Woong Kim“水文干旱预测机器学习技术的综合评估”的讨论
IF 2.6 4区 工程技术 Q3 AGRICULTURAL ENGINEERING
Journal of Irrigation and Drainage Engineering
Pub Date : 2022-12-01 DOI: 10.1061/(asce)ir.1943-4774.0001722
Isa Ebtehaj, H. Bonakdari
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引用次数: 0
Discussion of “Determination of Discharge Distribution in Meandering Compound Channels Using Machine Learning Techniques” by Abinash Mohanta, Arpan Pradhan, and K. C. Patra Abinash Mohanta, Arpan Pradhan和K. C. Patra对“使用机器学习技术确定蜿蜒复合通道的流量分布”的讨论
IF 2.6 4区 工程技术 Q3 AGRICULTURAL ENGINEERING
Journal of Irrigation and Drainage Engineering
Pub Date : 2022-12-01 DOI: 10.1061/(asce)ir.1943-4774.0001727
Balraj Singh, P. Sihag
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引用次数: 0
Closure to “CFD Simulations of Conical Central Baffle Flumes” by Ankur Kapoor, Aniruddha D. Ghare, and Avinash M. Badar Ankur Kapoor, Aniruddha D. gare和Avinash M. Badar的“锥形中央挡板水槽的CFD模拟”结束
IF 2.6 4区 工程技术 Q3 AGRICULTURAL ENGINEERING
Journal of Irrigation and Drainage Engineering
Pub Date : 2022-12-01 DOI: 10.1061/(asce)ir.1943-4774.0001724
Ankur Kapoor, A. D. Ghare, A. Badar
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引用次数: 0
Closure to “Velocity Distributions around Blocked Trash Racks” by Mahmoud Zayed 马哈茂德·扎耶德的《堵塞的垃圾桶周围的速度分布》的结尾
IF 2.6 4区 工程技术 Q3 AGRICULTURAL ENGINEERING
Journal of Irrigation and Drainage Engineering
Pub Date : 2022-11-01 DOI: 10.1061/(asce)ir.1943-4774.0001711
M. Zayed
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引用次数: 0
Discussion of “Velocity Distributions around Blocked Trash Racks” by Mahmoud Zayed Mahmoud Zayed关于“堵塞拦污栅周围的速度分布”的讨论
IF 2.6 4区 工程技术 Q3 AGRICULTURAL ENGINEERING
Journal of Irrigation and Drainage Engineering
Pub Date : 2022-11-01 DOI: 10.1061/(asce)ir.1943-4774.0001712
A. Azimi
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引用次数: 0
Air–Water Flows and Head Losses on Stepped Spillways with Inclined Steps 倾斜台阶阶梯式溢洪道的气水流动及水头损失
IF 2.6 4区 工程技术 Q3 AGRICULTURAL ENGINEERING
Journal of Irrigation and Drainage Engineering
Pub Date : 2022-11-01 DOI: 10.1061/(asce)ir.1943-4774.0001701
Yvan Arosquipa Nina, R. Shi, D. Wüthrich, H. Chanson
: On a stepped spillway, the staircase invert profile generates some intense turbulent dissipation during the spill, associated with a significant reduction of kinetic energy, as well as strong self-aeration. The present study focused on the effects of inclined downward steps on the air – water flow properties, flow resistance, and head losses because these mostly relate to spillway design. Some physical modeling was conducted in a relatively large facility with a 45° stepped chute (1V ∶ 1H) operating with Reynolds numbers 2 . 8 × 10 3 < Re < 1 × 10 6 . The presence of downward steps induced some elongated asymmetrical cavity shapes, creating a less stable cavity recirculation pattern along the entire chute, leading to different interactions with the main stream. In terms of basic air – water flow properties, the distributions of void fraction and bubble count rate presented very close results for all three stepped geometries, both qualitatively and quantitatively. The interfacial velocities did not reach any uniform equilibrium (i.e., normal flow) condition, and the fastest velocities were recorded with the 1V ∶ 2.33H inclined downward stepped chute geometry ( δ ¼ 23 . 3 ° and λ = k ¼ 3 ), and the slowest velocities on the horizontal stepped chute ( δ ¼ 0 and λ = k ¼ 2 ). The Darcy-Weisbach friction factor f and relative head loss Δ H = H max were estimated in the self-aerated flow. The comparative analyses suggested that the largest total drag and head losses were observed on the stepped chute with flat horizontal steps. An inclined downward stepped design yielded lesser head losses for all investigated flow conditions, providing an important information for practical engineers designing these hydraulic structures. DOI: 10.1061/(ASCE)IR.1943-4774.0001701. © 2022 American Society of Civil Engineers.
:在阶梯式溢洪道上，楼梯式倒拱剖面在溢流过程中产生强烈的湍流耗散，这与动能的显著降低以及强自曝气有关。由于溢洪道的设计与水流特性、水流阻力和水头损失密切相关，因此本文主要研究了向下倾斜台阶对溢洪道气水流动特性、流动阻力和水头损失的影响。在一个较大的设施中，采用45°阶梯溜槽(1V∶1H)，雷诺数为2，进行了一些物理建模。8 × 10 3 < Re < 1 × 10 6。向下台阶的存在导致了一些细长的不对称空腔形状，沿着整个溜槽形成了一个不太稳定的空腔再循环模式，导致与主流的不同相互作用。在基本的空气-水流动特性方面，孔隙率和气泡计数率的分布在定性和定量上都表现出非常接近的结果。界面速度没有达到均匀平衡(即正常流动)状态，以1V∶2.33H倾斜向下阶梯状溜槽几何形状(δ¼23)速度最快。3°，λ = k¼3)，水平阶梯溜槽上的最慢速度为δ¼0，λ = k¼2。估算了自曝气流动中的Darcy-Weisbach摩擦系数f和相对水头损失Δ H = H max。对比分析表明，水平台阶平坦的梯级溜槽总阻力和水头损失最大。倾斜向下的阶梯设计在所有研究的流动条件下都产生了较小的水头损失，为实际工程师设计这些水工结构提供了重要的信息。DOI: 10.1061 /(第3期)ir.1943 - 4774.0001701。©2022美国土木工程师学会。
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引用次数: 1
Optimal Sprinkler Spacing for a Mini Center Pivot System 小型中心枢轴系统的最优喷水间距
IF 2.6 4区 工程技术 Q3 AGRICULTURAL ENGINEERING
Journal of Irrigation and Drainage Engineering
Pub Date : 2022-11-01 DOI: 10.1061/(asce)ir.1943-4774.0001715
Hadji Mohammed Salah, A. Guerrah, A. Atia
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引用次数: 0
Machine-Learning Models to Improve Accuracy of Real-Time Reference Evapotranspiration Estimates in an Arid Environment 提高干旱环境中实时参考蒸发蒸腾量估计精度的机器学习模型
IF 2.6 4区 工程技术 Q3 AGRICULTURAL ENGINEERING
Journal of Irrigation and Drainage Engineering
Pub Date : 2022-11-01 DOI: 10.1061/(asce)ir.1943-4774.0001714
J. Pirvali Beiranvand, M. Ghamghami
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引用次数: 1
Improving Land-Surface Model Simulations in Irrigated Areas by Incorporating Soil Moisture–Based Irrigation Estimates in Community Land Model 通过将基于土壤水分的灌溉估计纳入社区土地模型来改进灌溉区的地表模型模拟
IF 2.6 4区 工程技术 Q3 AGRICULTURAL ENGINEERING
Journal of Irrigation and Drainage Engineering
Pub Date : 2022-11-01 DOI: 10.1061/(asce)ir.1943-4774.0001716
M. Zohaib, Muhammad Umair, Minha Choi
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引用次数: 0
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