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Bed configurations downstream combined V-Notch-sharped edged Weir with inverted V-Shaped gate 带倒 V 形闸门的组合式 V 形缺口斜边堰下游的堰床结构
Pub Date : 2023-12-05 DOI: 10.1080/09715010.2023.2290102
Mohamed M. Ibrahim, A. I. Diwedar, A. Ibraheem, Noha F. Fathallah, Amir Ibrahim
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引用次数: 0
Boundary shear stress and apparent shear forces in compound channels with different floodplain widths 洪泛区宽度不同的复合河道中的边界剪应力和表观剪切力
Pub Date : 2023-11-18 DOI: 10.1080/09715010.2023.2282981
Ebissa Gadissa Kedir, C. Ojha, K. S. H. Prasad
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引用次数: 0
Evaluation of design approaches of desilting basins for hydroelectric projects in Himalayan region 喜马拉雅地区水电项目清淤池设计方法评估
Pub Date : 2023-11-18 DOI: 10.1080/09715010.2023.2283593
Arun Goel, Aditya Thakare, M.K. Verma, M. Qamar
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引用次数: 0
Turbulence effect on total mechanical energy budget and energy loss of turbulent flows with different hydraulic regimes in open-channel transitions 湍流对明渠过渡中不同水力状态湍流总机械能收支和能量损失的影响
Pub Date : 2023-11-12 DOI: 10.1080/09715010.2023.2276924
Mahsa Mahmoudi, Mohammad Ali Banihashemi
ABSTRACTIn this study, a modified form of the total mechanical energy budget equation is developed for 3-D turbulent flows with different hydraulic regimes in open-channel transitions, from which the effect of all turbulence parameters can be evaluated by applying some equalizations and RANS numerical simulations. The total energy equation is also used to extract an explicit relationship for energy loss based on turbulence parameters. The findings are presented in the form of the application of the relationship to calculate the energy loss based on simulation results for subcritical turbulent flow and hydraulic jump in open-channel transitions, which leads to identifying the effect of non-homogeneity and anisotropy of turbulence on flow energy balance. The results show that the work done by viscous shear stresses, the viscous diffusion of turbulence, and the turbulent diffusion have little to no effect on the total mechanical energy budget of open-channel turbulent flows; instead, the effect of the variations of turbulent kinetic energy and the work done by turbulence stresses is more significant. The benefit of using the modified energy equation is demonstrated by the potential for evaluating the details that were not previously considered.KEYWORDS: Mechanical energy lossenergy budgetturbulent flowdifferent hydraulic regimesnumerical simulations Disclosure statementNo potential conflict of interest was reported by the authors.Data availability statementAll data and models generated or used during the study appear in the submitted article.Notes1. second order, upwind-biased, unbounded.Additional informationFundingThis research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors. The authors have no relevant financial or non-financial interests to disclose.
摘要本文针对明渠过渡中不同水力状态的三维湍流,建立了一种修正的总机械能平衡方程,并通过一些均衡化和RANS数值模拟来评估各湍流参数的影响。利用总能量方程,导出了基于湍流参数的能量损失的显式关系。通过对亚临界湍流和明渠过渡段水力跃变的模拟结果,将该关系式应用于计算能量损失,从而识别出湍流的非均匀性和各向异性对流动能量平衡的影响。结果表明:粘性剪切应力所做的功、湍流的粘性扩散和湍流扩散对明渠湍流的总机械能收支影响很小或没有影响;相反,湍流动能的变化和湍流应力所做功的影响更为显著。使用修正后的能量方程的好处可以通过评估以前没有考虑到的细节的潜力来证明。关键词:机械能损失、能量预算、湍流、不同水力工况、数值模拟披露声明作者未报告潜在利益冲突。数据可用性声明在研究过程中生成或使用的所有数据和模型均出现在提交的文章中。二阶,逆风偏置,无界。本研究未获得任何公共、商业或非营利部门的资助机构的特别资助。作者没有相关的财务或非经济利益需要披露。
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引用次数: 0
Numerical investigation on the effect of flexible vegetation in open-channel flow incorporating FSI 柔性植被对明渠水流影响的FSI数值研究
Pub Date : 2023-11-02 DOI: 10.1080/09715010.2023.2263413
V.S. Alsina, Miji Cherian R
ABSTRACTThe understanding and studying of the vegetation effect on the natural water flows is an important objective in modern scientific research regarding river management and restoration, with high environmental impact. Vegetation in the open-channel flow significantly affects the velocity of flow. In the present study, influence of the flexible vegetation on the flow characteristics of open-channel flow was resolved numerically using computational fluid dynamics. For the numerical study of the open-channel flow with flexible vegetation, fluid–structure interaction (FSI) is used. The obtained results were then compared with the numerical results of rigid vegetation. The influence of different parameters such as depth of flow, flow velocity, slenderness ratio of vegetation and density of vegetation were studied. It was found that incorporation of FSI in the analysis is essential to accurately predict the flow characteristics. It was also found that the simulation using FSI is more critical in case of submerged vegetation in an open-channel flow for all flow velocities.KEYWORDS: Flexible vegetationcomputational fluid dynamicsfluid–structure interaction List of Abbreviations Abbreviations=DefinitionsCd=Drag coefficientCFD=Computational fluid dynamicsFSI=Fluid structure interactionLES=Large Eddy simulationsVOF=Volume of fluidDisclosure statementNo potential conflict of interest was reported by the author(s).
摘要了解和研究植被对自然水流的影响是现代河流治理与修复科学研究的重要目标,具有较高的环境影响。明渠水流中植被对水流速度有显著影响。本文采用计算流体力学的方法,对柔性植被对明渠流动特性的影响进行了数值求解。采用流固耦合(FSI)方法对具有柔性植被的明渠流动进行数值研究。将所得结果与刚性植被的数值结果进行了比较。研究了流深、流速、植被长细比、植被密度等不同参数的影响。研究发现,在分析中加入FSI对于准确预测流动特性至关重要。研究还发现,在所有流速下,在明渠流中淹没植被的情况下,FSI模拟更为关键。关键词:柔性植被计算流体动力学流固耦合缩略语列表缩略语=定义scd =阻力系数cfd =计算流体动力学sfsi =流固耦合les =大涡模拟svof =流体体积披露声明作者未报告潜在的利益冲突。
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引用次数: 0
Development of daily gridded Penman-Monteith reference crop evapotranspiration data for Karnataka State, India 印度卡纳塔克邦每日网格化Penman-Monteith参考作物蒸散量数据的开发
Pub Date : 2023-10-30 DOI: 10.1080/09715010.2023.2263433
S. Niranjan, Lakshman Nandagiri
ABSTRACTReference crop evapotranspiration (ET0) estimates are often unavailable at fine spatial resolutions due to the lack of dense climatic networks. The present study was taken up to develop a methodology for obtaining a gridded Penman-Monteith (PM) ET0 dataset for Karnataka State, India, through spatial interpolation of estimates obtained at climate stations. Three interpolation techniques, Inverse Distance Weighted (IDW), Kriging, and Point-Based Sentinel Hospitals Area Distance (P-BSHADE), were employed to derive PM ET0 estimates. Considering the historical climate records of 67 stations located in Karnataka State for the period of 2006–2016, the interpolation methodologies were evaluated using a cross-validation procedure. Results showed that the performance of IDW was better with significant error reduction at validation sites. Subsequently, the IDW algorithm was used to derive daily PM ET0 values at 0.25° × 0.25° grids over the Karnataka State, India. Finally, the comparative analysis of developed PM ET0 gridded data product against three global ET0 products indicated the developed gridded ET0 to be most accurate across different agroclimatic zones. Web links of the developed product have been created in an effort to share the data on ET0, which is a critical input in a variety of studies in earth sciences.KEYWORDS: Penman-Monteithspatial interpolationIDWKrigingP-BSHADE AcknowledgementsWe are grateful to the Water Resources Development Organization (WRDO), Government of Karnataka, for providing the climate dataset used in the study and to three anonymous reviewers whose critical comments improved the quality of the manuscript.Disclosure statementNo potential conflict of interest was reported by the authors.Data availability statementData are openly available in a public repository that does not issue DOIs.The dataset developed in this study is stored in a repository and available in-text data citation.
由于缺乏密集的气候网络,通常无法在精细空间分辨率下获得参考作物蒸散(ET0)估算。本研究旨在开发一种方法,通过对气候站获得的估计值进行空间插值,获得印度卡纳塔克邦的网格化Penman-Monteith (PM) ET0数据集。采用三种插值技术,即逆距离加权(IDW)、克里格(Kriging)和基于点的哨点医院区域距离(P-BSHADE)来获得PM ET0估计。考虑到卡纳塔克邦67个站点2006-2016年的历史气候记录,使用交叉验证程序对插值方法进行了评估。结果表明,IDW的性能较好,在验证位点的误差显著降低。随后,利用IDW算法推导了印度卡纳塔克邦0.25°× 0.25°栅格的日PM ET0值。最后,将发达地区PM ET0网格化数据产品与全球三个ET0产品进行对比分析,发现发达地区网格化ET0在不同的农业气候带上最准确。已开发产品的网络链接已被创建,目的是为了分享关于ET0的数据,这是各种地球科学研究的关键输入。我们感谢卡纳塔克邦政府水资源开发组织(WRDO)提供了本研究中使用的气候数据集,并感谢三位匿名审稿人,他们的重要意见提高了本文的质量。披露声明作者未报告潜在的利益冲突。数据可用性声明数据在不发出doi的公共存储库中公开可用。本研究开发的数据集存储在一个存储库中,并提供文本数据引用。
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引用次数: 0
Meander geometry characteristics as a response to hydraulic and lithologic control in the active floodplains of Lower Nagar basin 下纳格尔盆地活动洪泛平原曲流几何特征对水力和岩性控制的响应
Pub Date : 2023-10-25 DOI: 10.1080/09715010.2023.2269127
Pranay Paul, Biswajit Das, Nanigopal Sarkar, Rumki Sarkar
ABSTRACTThe present work aims to evaluate the controlling factor of meander geometry in the alluvial rivers. The assimilation of lithologic and hydraulic analysis of the meandering channels puts new insight to the understanding of the meander geometry. The study compares two highly contrasting meandering rivers of Nagar and Kulik in the Lower Nagar Basin, India. To assess the connection between the meandering nature with the hydraulic and lithologic factors, extensive field survey was made during the bank-full monsoon period. The principal component analysis between the hydraulic variables and meandering components suggests that the hydraulic factors of Nagar more effectively control the bend structure of the river, whereas the lithology of the Kulik river controls the meandering planforms. The meander patterns have shown significant transition flowing over different lithologies of grainsize combinations. The statistical prediction based on the hydraulic functions was used to predict the future possible changes in meandering planform. Moreover, the implication of the result was validated with the past century changes and thus can be suitable for the river management practices. In general, the meandering dimensions (in terms of λ, Am and Rc) are found to be maximized when finer materials are prevalent and vice-versa.KEYWORDS: Meander geometryhydraulic controlGrainsize statisticssoil grain phi scale (Φ) AcknowledgementsThe authors are grateful to the local people for their support during the field survey.Disclosure statementAuthors state that they have no known conflict of interest financially or academically that would influence the research work.CRediT authorship contribution statementPranay Paul: Data curation, Formal analysis, Investigation, Methodology, Visualization, Writing – original draft & Validation, Review & editing. Biswajit Das: Data curation & Investigation. Nanigopal Sarkar: Data curation, Formal analysis. Rumki Sarkar: Data Curation, Investigation, Conceptualization, Methodology, Resources, Supervision, Validation, Review & editing.Additional informationFundingThe authors did not receive any financial support from any profit or non-profit organization to conduct the research work.
摘要本文旨在探讨冲积河流曲流形态的控制因素。通过对曲流河道的岩性和水力分析,对曲流河道的几何形态有了新的认识。该研究比较了印度纳加尔盆地下游的纳加尔河和库利克河两条截然不同的蜿蜒河流。为评价曲流性质与水力、岩性因素的关系,在满岸季风期进行了广泛的野外调查。水力变量与曲流分量的主成分分析表明,纳加尔河的水力因素更有效地控制了河流的弯曲构造,而库力克河的岩性控制了曲流平台。曲流模式在不同岩性的粒度组合中表现出明显的转变。采用基于水力函数的统计预测方法对曲流平台未来可能发生的变化进行了预测。此外,该结果的意义与近百年来的变化相吻合,因此可以适用于河流管理实践。一般来说,当较细的材料普遍存在时,弯曲尺寸(以λ, Am和Rc表示)被发现是最大的,反之亦然。关键词:曲流几何;水力控制;粒度统计;土壤粒度尺度(Φ)披露声明作者声明他们没有已知的影响研究工作的经济或学术利益冲突。pranay Paul:数据管理,形式分析,调查,方法论,可视化,写作-原稿和验证,审查和编辑。Biswajit Das:数据管理和调查。Nanigopal Sarkar:数据管理,形式分析。Rumki Sarkar:数据管理,调查,概念化,方法论,资源,监督,验证,审查和编辑。作者没有从任何利润或非营利组织获得任何资金支持来进行研究工作。
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引用次数: 0
Modeling of groundwater-surface water interactions: a review of integration strategies 地下水-地表水相互作用的模拟:整合策略综述
Pub Date : 2023-10-03 DOI: 10.1080/09715010.2023.2263434
Hossein Ahmadi
ABSTRACTGroundwater and surface water systems (GW-SW) are interconnected in most landscapes and climates, and the interactions between them, known as GW-SW interactions, are spatially and temporally dynamic and characterized by significant uncertainty. Understanding and characterizing these interactions are crucial for effective water resource management. In recent decades, there has been considerable attention and progress in addressing GW-SW interaction problems. The integration of surface and subsurface water modeling has emerged as a practical approach to simulate GW-SW interactions and inform the development of best management practices (BMPs) for water resource management. To effectively simulate GW-SW interactions, a clear understanding of coupling techniques is essential. This study reviews various integrated modeling approaches applied to simulate GW-SW interactions in water resources management. The identified gaps in GW-SW interaction modeling approaches are categorized into three groups: 1) physically based models, 2) surrogate-based models, and 3) simulation-based optimization models. The objective of this study is to make a contribution to the classification of integrated modeling approaches and provide insights into the advantages and limitations of different techniques. Ultimately, this research aims to establish a standard for selecting an appropriate simulation tool for GW-SW management based on specific limitations and requirements.KEYWORDS: Groundwatersurface waterphysically based modelsurrogate based modelsimulation based optimization model Disclosure statementNo potential conflict of interest was reported by the author(s).
摘要在大多数景观和气候中,地下水和地表水系统(GW-SW)是相互关联的,它们之间的相互作用(GW-SW相互作用)是时空动态的,具有显著的不确定性。了解和描述这些相互作用对有效的水资源管理至关重要。近几十年来,在解决GW-SW相互作用问题上取得了相当大的关注和进展。地表水和地下水建模的集成已经成为模拟GW-SW相互作用的实用方法,并为水资源管理的最佳管理实践(BMPs)的发展提供信息。为了有效地模拟GW-SW相互作用,对耦合技术的清晰理解是必不可少的。本研究综述了各种用于模拟水资源管理中GW-SW相互作用的集成建模方法。在GW-SW交互建模方法中发现的缺陷可分为三类:1)基于物理的模型,2)基于代理的模型,以及3)基于仿真的优化模型。本研究的目的是对集成建模方法的分类做出贡献,并提供对不同技术的优点和局限性的见解。最终,本研究的目的是根据具体的限制和要求,为GW-SW管理选择合适的仿真工具建立一个标准。关键词:地下水地表水基于物理模型基于代理模型基于模拟优化模型披露声明作者未报告潜在的利益冲突。
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引用次数: 0
Developing a numerical model for sediment transport in channel network by considering multigrade bed load sediment 建立了考虑多级河床输沙的河道网输沙数值模型
Pub Date : 2023-08-29 DOI: 10.1080/09715010.2023.2250303
S. Kumar, P. R. Hanmaiahgari, H. Singh
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引用次数: 0
Assessing hydrological alterations in Malibamatso River using River Flow Health Index 利用河流流量健康指数评估马里巴马索河水文变化
Pub Date : 2023-08-16 DOI: 10.1080/09715010.2023.2245390
M. Mohanty, V. Tare
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引用次数: 0
期刊
ISH Journal of Hydraulic Engineering
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