Water Resources Management最新文献

Distributed Nonconvex Optimization for Control of Water Networks with Time-coupling Constraints.

IF 3.9 3区环境科学与生态学

Water Resources Management Pub Date : 2025-01-01 Epub Date: 2024-09-23 DOI: 10.1007/s11269-024-03985-8

Bradley Jenks, Aly-Joy Ulusoy, Filippo Pecci, Ivan Stoianov

{"title":"Distributed Nonconvex Optimization for Control of Water Networks with Time-coupling Constraints.","authors":"Bradley Jenks, Aly-Joy Ulusoy, Filippo Pecci, Ivan Stoianov","doi":"10.1007/s11269-024-03985-8","DOIUrl":"10.1007/s11269-024-03985-8","url":null,"abstract":"In this paper, we present a new control model for optimizing pressure and water quality operations in water distribution networks. Our formulation imposes a set of time-coupling constraints to manage temporal pressure variations, which are exacerbated by the transition between pressure and water quality controls. The resulting optimization problem is a nonconvex, nonlinear program with nonseparable structure across time steps. This problem proves challenging for state-of-the-art nonlinear solvers, often precluding their direct use for near real-time control in large-scale networks. To overcome this computational burden, we investigate a distributed optimization approach based on the alternating direction method of multipliers (ADMM). In particular, we implement and evaluate two algorithms: a standard ADMM scheme and a two-level variant that provides theoretical convergence guarantees for our nonconvex problem. We use a benchmarking water network and a large-scale operational network in the UK for our numerical experiments. The results demonstrate good convergence behavior across all problem instances for the two-level algorithm, whereas the standard ADMM approach struggles to converge in some instances. With an appropriately tuned penalty parameter, however, both distributed algorithms yield good quality solutions and computational times compatible with near real-time (e.g. hourly) control requirements for large-scale water networks.","PeriodicalId":23611,"journal":{"name":"Water Resources Management","volume":"39 1","pages":"523-546"},"PeriodicalIF":3.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11801186/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143366094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Changing Landscape of Water Resources Planning in England. 英国不断变化的水资源规划景观。

IF 3.9 3区环境科学与生态学

Water Resources Management Pub Date : 2025-01-01 Epub Date: 2025-01-16 DOI: 10.1007/s11269-024-04072-8

Ali Leonard, Jaime Amezaga, Richard Blackwell, Elizabeth Lewis, Chris Kilsby

{"title":"The Changing Landscape of Water Resources Planning in England.","authors":"Ali Leonard, Jaime Amezaga, Richard Blackwell, Elizabeth Lewis, Chris Kilsby","doi":"10.1007/s11269-024-04072-8","DOIUrl":"https://doi.org/10.1007/s11269-024-04072-8","url":null,"abstract":"Water resources planning in England has undergone a significant transformation from a fragmented, piecemeal approach to a more strategic, multi-scale framework. This shift is a response to the pressing need for increased resilience in the face of climate change, population growth, and environmental pressures. Recognising the limitations of existing planning frameworks established during privatisation, new national, regional, company, and sub-regional frameworks have emerged to address gaps and enhance strategic planning efforts. Understanding the critical pathway dependencies, opportunities, and constraints allows reforms to be designed and implemented with a better chance of success. Several key features characterise water resources planning in England. Firstly, the systems are inherently complex and fragmented, requiring tailored approaches rather than one-size-fits-all solutions. Secondly, planning operates within a neoliberal framework emphasising economic efficiency. Thirdly, subjective concepts like risk, uncertainty, and value are managed through technical quantitative methods which can pose challenges for transparency. Fourthly, while legislation often operates in silos, there is a growing demand for more integrated planning approaches. Funding and regulatory powers play crucial roles in water resources planning. Access to capital is influenced by the institutional environment and broader economic and political factors, with government and regulators ultimately holding power over the framework. Companies, driven by the profit motive, are responsible for detailed planning and delivery, regulated by standards and reputational incentives. Public participation is framed as consumer engagement. Aligning incentives for public good with financial rewards and ensuring effective regulation are vital for the framework's success.","PeriodicalId":23611,"journal":{"name":"Water Resources Management","volume":"39 5","pages":"2401-2418"},"PeriodicalIF":3.9,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11958370/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143773341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Time to Negative Conversion among Adult COVID-19 Patients on Chronic Hemodialysis Admitted at the Philippine General Hospital - A Retrospective Cohort Study. 菲律宾综合医院收治的 COVID-19 慢性血液透析成人患者的阴性转阴时间--一项回顾性队列研究。

3区环境科学与生态学

Water Resources Management Pub Date : 2024-03-22 eCollection Date: 2024-01-01 DOI: 10.47895/amp.vi0.6460

Kristine May F Valmoria, Paolo Nikolai H So, Elizabeth S Montemayor

{"title":"The Time to Negative Conversion among Adult COVID-19 Patients on Chronic Hemodialysis Admitted at the Philippine General Hospital - A Retrospective Cohort Study.","authors":"Kristine May F Valmoria, Paolo Nikolai H So, Elizabeth S Montemayor","doi":"10.47895/amp.vi0.6460","DOIUrl":"10.47895/amp.vi0.6460","url":null,"abstract":"Objectives: In the Philippines, patients on chronic hemodialysis with COVID-19 remain admitted in hospitals despite clinical recovery because most free-standing dialysis units require proof of negative conversion via Reverse Transcriptase - Polymerase Chain Reaction (RT-PCR). This study aims to determine the time to negative conversion of COVID-19 RT-PCR testing among adult patients on chronic hemodialysis with COVID-19 admitted at the Philippine General Hospital (PGH) and bring insight in using the symptom or time-based procedure as recommended by local guideline, and ultimately, to ensure delivery of adequate hemodialysis despite being infected with COVID-19, shorten isolation period, and conserve resources especially in resource-limited settings.Methods: This is a retrospective cohort study on all adult patients on chronic hemodialysis who were admitted in PGH after the diagnosis of COVID-19 by RT-PCR between March 2020 and February 2021. Descriptive statistics was used in summarizing the data.Results: A total of 90 patients on chronic hemodialysis who tested positive for COVID-19 via RT-PCR admitted at PGH were included in the study. Most of these patients had moderate COVID-19 at 53.3%. The median number of days from onset of symptoms to clinical recovery was 14.5 days. The median time to first negative conversion was 18 days. Most of these patients had negative conversion at the second week. The correlation coefficient between time to clinical recovery and negative conversion was 0.214.Conclusion: Among adult patients on chronic hemodialysis who were admitted in PGH after the diagnosis of COVID-19, the time to negative conversion was longer compared to the time to clinical recovery with a very weak correlation between the two.","PeriodicalId":23611,"journal":{"name":"Water Resources Management","volume":"34 1","pages":"22-27"},"PeriodicalIF":0.0,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11240000/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70460198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling Transient Mixed Flows in Drainage Networks With Smoothed Particle Hydrodynamics 用平滑粒子流体力学模拟排水管网中的瞬态混合流

IF 4.3 3区环境科学与生态学

Water Resources Management Pub Date : 2024-01-10 DOI: 10.1007/s11269-023-03689-5

Wenke Song, Hexiang Yan, T. Tao, Mingfu Guan, Fei Li, K. Xin

引用次数: 0

Enhancing Flooding Depth Forecasting Accuracy in an Urban Area Using a Novel Trend Forecasting Method 利用新型趋势预测方法提高城市地区洪水深度预测精度

IF 4.3 3区环境科学与生态学

Water Resources Management Pub Date : 2024-01-10 DOI: 10.1007/s11269-023-03725-4

Song-Yue Yang, You-Da Jhong, B. Jhong, Yun-Yang Lin

引用次数: 0

Assessing Climate Vulnerability of Ramsar Wetlands through CMIP6 Projections 通过 CMIP6 预测评估拉姆萨尔湿地的气候脆弱性

IF 4.3 3区环境科学与生态学

Water Resources Management Pub Date : 2024-01-08 DOI: 10.1007/s11269-023-03726-3

Shivam Singh, Manish Kumar Goyal, Erumalla Saikumar

引用次数: 0

Investigating the Impact of Cumulative Pressure-Induced Stress on Machine Learning Models for Pipe Breaks 调查累积压力应力对管道破裂机器学习模型的影响

IF 4.3 3区环境科学与生态学

Water Resources Management Pub Date : 2023-12-30 DOI: 10.1007/s11269-023-03687-7

C. Konstantinou, Carlos Jara-Arriagada, I. Stoianov

引用次数: 0

Water Resources Allocation: Iteractions Between Equity/Justice and Allocation Strategies 水资源分配：公平/公正与分配策略之间的相互作用

IF 4.3 3区环境科学与生态学

Water Resources Management Pub Date : 2023-12-29 DOI: 10.1007/s11269-023-03682-y

Elmira Valipour, H. Ketabchi, R. S. Shali, Saeed Morid

引用次数: 0

Streamflow Data Infilling Using Machine Learning Techniques with Gamma Test 利用伽马测试的机器学习技术填充流场数据

IF 4.3 3区环境科学与生态学

Water Resources Management Pub Date : 2023-12-29 DOI: 10.1007/s11269-023-03694-8

Saad Dahmani, S. Latif

引用次数: 0

A Method For Estimating Excess Rainfall Intensity (ERI) of Combined Sewer Overflow (CSO) Based on Peak Over Threshold (POT) Sampling And The Generalized Pareto Distribution (GPD) 基于峰值超过阈值 (POT) 采样和广义帕累托分布 (GPD) 的联合污水溢流 (CSO) 过量降雨强度 (ERI) 估算方法

IF 4.3 3区环境科学与生态学

Water Resources Management Pub Date : 2023-12-28 DOI: 10.1007/s11269-023-03708-5

Xingpo Liu, Wenke Zang, Yuwen Zhou

引用次数: 0