Proceedings of the Institution of Civil Engineers-Water Management最新文献_第4页

Roller fluctuations of pre-aerated high-Froude-number hydraulic jumps 预曝气高弗劳德数液压跳跃的滚筒波动

IF 1.1 4区工程技术

Proceedings of the Institution of Civil Engineers-Water Management Pub Date : 2023-01-31 DOI: 10.1680/jwama.21.00046

Weiyang Zhao, Wei-lin Xu, Han Wang, Rongcai Tang, Ruidi Bai

{"title":"Roller fluctuations of pre-aerated high-Froude-number hydraulic jumps","authors":"Weiyang Zhao, Wei-lin Xu, Han Wang, Rongcai Tang, Ruidi Bai","doi":"10.1680/jwama.21.00046","DOIUrl":"https://doi.org/10.1680/jwama.21.00046","url":null,"abstract":"This work presents an experimental study of the fluctuating properties of hydraulic jump rollers for high-Froude-number and pre-aerated inflow conditions, to investigate the validity of empirical relationships in the literature that are derived typically from experiments for smaller Froude numbers and clear-water approach flows. The jump roller fluctuations are evaluated in terms of the dimensions of the roller surface profile, the fluctuation magnitudes and frequencies of the instantaneous jump toe positions and water elevations including at the tailwater surface, and the formation frequency and advection velocity of internal vortices in the shear layer. The effects of pre-aeration are found primarily in the length-scale properties such as jump length and surface fluctuation magnitudes, while the time-scale properties such as characteristic frequencies of the unsteady motions are not affected. Extrapolation of existing quantitative prediction of jump roller dynamic properties to high-Froude-number flow conditions should be performed carefully. An assessment of the fluctuating bubble counts within fixed time intervals yields close frequencies between the bubble grouping motions in the shear layer and the jump toe and tailwater wave motions, thus implying possible correlations between the roller surface deformations and air entrainment.","PeriodicalId":54569,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Water Management","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73955221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Using hydrological simulation and a storm water model to simulate catchment water quality 利用水文模拟和暴雨模型模拟集水区水质

IF 1.1 4区工程技术

Proceedings of the Institution of Civil Engineers-Water Management Pub Date : 2022-10-27 DOI: 10.1680/jwama.21.00081

K. Jung, Yong-Hoon Jeong, In-Kyun Jung, Sufang Kang, S. Yoon, D. Kwak

引用次数: 0

A Novel Optimisation Framework for the Interpretation of Unconfined Aquifer Pumping Test Data 一种新的无承压含水层抽水试验数据解释优化框架

IF 1.1 4区工程技术

Proceedings of the Institution of Civil Engineers-Water Management Pub Date : 2022-10-24 DOI: 10.1680/jwama.21.00115

A. Ufuk Şahin

{"title":"A Novel Optimisation Framework for the Interpretation of Unconfined Aquifer Pumping Test Data","authors":"A. Ufuk Şahin","doi":"10.1680/jwama.21.00115","DOIUrl":"https://doi.org/10.1680/jwama.21.00115","url":null,"abstract":"The complex well function formulations developed for the unconfined aquifer systems make the determination of aquifer parameters difficult and inefficient via the classical methods. In addition, the dimensional dependency of the aquifer parameters as well as non-linear and non-convex fashion of inverse groundwater problems could make the stand-alone use of the metaheuristic algorithms inefficient in terms of computation time and effort, producing non-unique solutions. Therefore, a novel optimisation framework was established to interpret the pumping test data collected from an unconfined aquifer. The proposed approach works with four inputs which are based on the hybrid use of two non-dimensional physical and newly introduced two non-physical parameters. This study grasps the benefits of the simplicity of the traditional methods and the accuracy from Differential Evolution Algorithm (DE). The capability of the introduced scheme was broadly examined by several pumping test scenarios including hypothetical and the real field test datasets. A sensitivity analysis was also performed to understand the uncertainty associated with the estimated flow parameters. The results reveal that the proposed scheme powered by DE is able to achieve the outstanding estimation performance over the conventional methods and the implemented nature-inspired algorithms.","PeriodicalId":54569,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Water Management","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85929730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The Influence of Boundary Conditions on Pressure Wave Reflection Simulation at Pipe 边界条件对管道压力波反射模拟的影响

IF 1.1 4区工程技术

Proceedings of the Institution of Civil Engineers-Water Management Pub Date : 2022-10-24 DOI: 10.1680/jwama.21.00126

Linkun Zhao, Jianqiang Deng, Xijian Guo, Z. Cao

{"title":"The Influence of Boundary Conditions on Pressure Wave Reflection Simulation at Pipe","authors":"Linkun Zhao, Jianqiang Deng, Xijian Guo, Z. Cao","doi":"10.1680/jwama.21.00126","DOIUrl":"https://doi.org/10.1680/jwama.21.00126","url":null,"abstract":"In previous literature, the flow characteristics of pressure waves in hydraulic experiments have demonstrated that there are two types of reflected waves: the same pressure vibration trend type and the opposite vibration trend type, with the equal pressure amplitude as the original wave. The reflection characteristics in the simulation must be consistent with those in the experiment. To determine reasonable boundary conditions, this paper focused on the simulation of pressure waves reflection under five combinations of boundary conditions using the computational fluid dynamics (CFD) method. Three three-dimensional simulation models were developed based on the k-ε turbulence model. Reflection characteristics were obtained under different boundaries. The result shows that the pressure boundary in the pipe could get reflected waves correctly. Reservoir is considered more accurate than the pressure boundary, which can reflect the slight fluctuation of the reflected wave. Both the wall boundary and the velocity boundary could be used to simulate the operation of the valve. However, if intercepting a part of the pipeline as objective, the reflected wave shows phase advance and pressure amplitude attenuation compared with that at the same position in the original pipeline. This paper is helpful for setting reasonable boundaries in pressure wave simulation.","PeriodicalId":54569,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Water Management","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90962248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of simultaneous use of cable and bed sill scour countermeasures around a cylindrical pier 圆柱墩周围索与床基同时使用的冲刷对策效果分析

IF 1.1 4区工程技术

Proceedings of the Institution of Civil Engineers-Water Management Pub Date : 2022-08-03 DOI: 10.1680/jwama.21.00043

Ehsan Gerami, Manouchehr Heidarpour, Reza Mohammadpour Ghalati

引用次数: 0

Developing groundwater contaminant remediation strategies for seven regional aquifers 制定7个区域含水层地下水污染物修复策略

IF 1.1 4区工程技术

Proceedings of the Institution of Civil Engineers-Water Management Pub Date : 2022-07-12 DOI: 10.1680/jwama.21.00032

Sandra Vasin, Grzegorz Gzyl, Marina Bellotti, Loris Colombo, Marco Ghirardi, Goran Gjetvaj, Petr Kohout, Joerg Prestor, Susanne Rollwagen

{"title":"Developing groundwater contaminant remediation strategies for seven regional aquifers","authors":"Sandra Vasin, Grzegorz Gzyl, Marina Bellotti, Loris Colombo, Marco Ghirardi, Goran Gjetvaj, Petr Kohout, Joerg Prestor, Susanne Rollwagen","doi":"10.1680/jwama.21.00032","DOIUrl":"https://doi.org/10.1680/jwama.21.00032","url":null,"abstract":"A common challenge in many cities in Europe is endangerment of natural resources due to soil and water pollution. Despite extensive investigation and remediation measures over decades and current practices of environmental management, residues of pollutants persist in soil and groundwater, reducing the functionality of many urban areas. In complex hydrogeological systems, where contaminated plumes are overlapping and/or diffuse contamination is present, technical and administrative activities have to be thoroughly planned and executed in the long term to secure the recovery of groundwater quality. Communities need a management strategy (MS) to manage soil and groundwater contamination in urban areas, especially where contamination exceeds local scales but does not reach the national level. A MS drives administrations to understand hydrogeological system properties, define new, reachable target values and give practical guidance for the implementation of necessary measures. Implementation of a MS fosters the early involvement of key stakeholders and their contribution to the development of MS itself. The strategy has proven to be an appropriate and flexible tool for the transfer of scientific knowledge to the planning, coordination and implementation necessary for the remediation of large-scale groundwater contamination.","PeriodicalId":54569,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Water Management","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138541014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effectiveness of cyclic irrigation (by normal and drainage water) in yield, yield components, and water productivity of maize, soybean, and sunflower 循环灌溉(正常水和排水)对玉米、大豆和向日葵产量、产量构成和水分生产力的影响

IF 1.1 4区工程技术

Proceedings of the Institution of Civil Engineers-Water Management Pub Date : 2022-07-06 DOI: 10.1680/jwama.21.00059

Mohammad Azizi, M. Albaji, S. Nasab

{"title":"The effectiveness of cyclic irrigation (by normal and drainage water) in yield, yield components, and water productivity of maize, soybean, and sunflower","authors":"Mohammad Azizi, M. Albaji, S. Nasab","doi":"10.1680/jwama.21.00059","DOIUrl":"https://doi.org/10.1680/jwama.21.00059","url":null,"abstract":"This study evaluated the efficiency of normal and drainage water for cyclic irrigation at a research farm at Shahid Chamran University of Ahvaz from 2019 to 2020. To this end, a 24×30 m farm (was selected and divided into 3 plots (A, B, and C). Corn, soybean, and sunflower were cultivated in plots A, B, and C, respectively, and drainage water was used for irrigation of the next plots (B and C). In plot B, a split-plot design was applied with randomized complete blocks with two treatments: irrigation type (Karun River water and drainage water) and urea fertilizer (100%, 75%, and 50% application) (with three replicates). The experiment design in plot C was similar to that of plot B except for 75% urea fertilizer. ANOVA results for soybean revealed that the interaction between irrigation type and urea levels had significant effects on growth yield and biological water productivity (P<0.01) and fresh leaf weight (P<0.05). ANOVA results for sunflower showed that the interaction between irrigation type and urea levels had significant effects on 100-seed weight, seed yield, and seed water productivity (P<0.05). The highest increase in productivity of the cyclic irrigation system for plot C was related to forage water productivity which increased from 0.768 to 2.603 kg.m−3. The water productivity of Karun River water in the total forage yield, total seed, and total biological yield for the cyclic irrigation system compared to conventional irrigation increased by 76.67%, 72.95%, and 75.45%, respectively. The lowest increase in water productivity from 0.276 to 0.821 (kg.m−3) was related to sunflower seed yield which was 2.97 times higher than conventional irrigation in the cyclic irrigation system. Overall, the data showed that compared to normal irrigation, cyclic irrigation with drainage water saved water and increased water productivity by 45.59% and 100%, respectively.","PeriodicalId":54569,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Water Management","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87423984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bottom and side-wall aeration performance of an offset aerator in a flood discharge chute 泄洪槽中偏置式曝气器的底部和侧壁曝气性能

IF 1.1 4区工程技术

Proceedings of the Institution of Civil Engineers-Water Management Pub Date : 2022-06-20 DOI: 10.1680/jwama.21.00053

Xuechun Liu, Ruidi Bai, Shan-jun Liu, Zhong Tian

{"title":"Bottom and side-wall aeration performance of an offset aerator in a flood discharge chute","authors":"Xuechun Liu, Ruidi Bai, Shan-jun Liu, Zhong Tian","doi":"10.1680/jwama.21.00053","DOIUrl":"https://doi.org/10.1680/jwama.21.00053","url":null,"abstract":"Building a chute aerator is an efficient measure to protect the chute bottom from cavitation damage in large flood-discharging hydraulic structures, but it sometimes fails to provide sufficient protection to the sidewalls. In this paper, basic air-water flow properties are investigated for discharge flows over an offset chute aerator model, with particular focus on the near-bottom and near-wall regions, for a range of discharge velocities over the offset brink 3.58 m/s < V < 8.02 m/s, Froude numbers 4.8 < Fr < 12.0, and Reynolds numbers 8.0×104 < Re < 9.2×104. Observations indicate little transverse variations in air-water flow properties except near the jet impact perimeter. The bottom air concentration and bubble frequency decrease at different rates downstream the impact point, and the influence of the Reynolds number on the bubble size and density should not be ignored. The shape of the clear-water core between the upper and lower aeration layers is identified with the aid of high-speed imaging and air concentration calibration against the wall. A formula is proposed to predict the narrowing of the jet core until its ending position.","PeriodicalId":54569,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Water Management","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83241824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Optimal Reservoir Operation using Parametric Elitist Cuckoo Search Algorithm 基于参数化精英布谷鸟搜索算法的水库优化调度

IF 1.1 4区工程技术

Proceedings of the Institution of Civil Engineers-Water Management Pub Date : 2022-06-06 DOI: 10.1680/jwama.21.00057

M. Trivedi, R. Shrivastava

{"title":"Optimal Reservoir Operation using Parametric Elitist Cuckoo Search Algorithm","authors":"M. Trivedi, R. Shrivastava","doi":"10.1680/jwama.21.00057","DOIUrl":"https://doi.org/10.1680/jwama.21.00057","url":null,"abstract":"Optimal reservoir operation has become a challenging problem due to streamflow uncertainties. Frameworks for optimal reservoir operation play a vital role in the management of water resources. Effective and judicious utilization of water from reservoirs helps to manage water deficit periods. The main objective in reservoir optimization is to design operating rules that can be used to derive real-time decisions on reservoir release. In this study a metaheuristic optimization algorithm, Parametric Elitist Cuckoo Search Algorithm (PECSA) based on basic Cuckoo Search Algorithm, has been applied for developing optimal operation decisions for Ravishankar Sagar reservoir in Mahanadi Reservoir Project complex, India. To evaluate the performance of the improved PECSA, the results obtained by this method has been compared with another heuristic method Time Variant Elitist Mutation Particle Swarm Optimization (TVEMPSO) algorithm and also with the standard CSA and PSO methods. PECSA improves system operation and has outperformed other methods in terms of achieving faster convergence rate. Besides, PECSA has also shown minor variations in optimal pattern of release policies with those obtained using the standard CSA. Finally, implication of the results and suggestion for further research are discussed.","PeriodicalId":54569,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Water Management","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82510490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Editorial: Reflecting on progress in water management adaptation to climate change 社论:反思适应气候变化的水资源管理进展

IF 1.1 4区工程技术

Proceedings of the Institution of Civil Engineers-Water Management Pub Date : 2022-06-01 DOI: 10.1680/jwama.2022.175.3.109

L. Beevers, M. Pregnolato

引用次数: 0