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Acoustic signal based water leakage detection system using hybrid machine learning model 基于声学信号的混合机器学习漏水检测系统
IF 2.7 3区 环境科学与生态学 Q3 WATER RESOURCES Pub Date : 2023-08-01 DOI: 10.1080/1573062X.2023.2239782
M. Saravanabalaji, N. Sivakumaran, S. Ranganthan, V. Athappan
ABSTRACT Water supply pipeline leakage is a major issue around the world. Leak detection and remediation can prevent water scarcity and some other problems. As a result, investigating pipeline leak-detecting technology has a high practical value. This study employs a promising technique for detecting pipeline leaks using Acoustic Emission (AE) signals. A dytran acceleration sensor was used to collect leakage signals in the time domain. The time-domain signal is transformed into a frequency domain by employing Fast Fourier Transform (FFT). The produced frequency signal has many dimensions which can be reduced to 17 by Principal Component Analysis (PCA). Intelligent leakage diagnosis techniques should eliminate time, and human intervention, and increase effectiveness. Machine learning (ML) models come into play at this point. To detect leakage, the hybrid ML model is proposed and it is compared with the conventional ML models. The best model for detecting water leakage is identified using the classification metrics.
摘要供水管道泄漏是世界范围内的一个重大问题。泄漏检测和修复可以防止缺水和其他一些问题。因此,研究管道泄漏检测技术具有较高的实用价值。这项研究采用了一种很有前途的技术,利用声发射(AE)信号检测管道泄漏。采用dytran加速度传感器对泄漏信号进行时域采集。时域信号通过采用快速傅立叶变换(FFT)被变换到频域。所产生的频率信号具有许多维度,这些维度可以通过主成分分析(PCA)减少到17。智能泄漏诊断技术应消除时间和人为干预,并提高有效性。机器学习(ML)模型在这一点上发挥了作用。为了检测泄漏,提出了混合ML模型,并与传统的ML模型进行了比较。使用分类度量来识别用于检测漏水的最佳模型。
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引用次数: 0
An ensemble data-driven approach for incorporating uncertainty in the forecasting of stormwater sewer surcharge 一种综合数据驱动的方法,将不确定性纳入雨污水附加费的预测
IF 2.7 3区 环境科学与生态学 Q3 WATER RESOURCES Pub Date : 2023-07-25 DOI: 10.1080/1573062X.2023.2240309
Felix Schmid, J. Leandro
ABSTRACT Stormwater surcharge events are unavoidable above a certain rainfall intensity. Thus, for protection and damage mitigation, forecast systems are of outstanding importance. This study develops an ensemble forecast system (EFS) to predict the beginning and end of sewer surcharge events. It applies a nonlinear autoregressive with exogenous inputs (NARX) network to each member of the ensemble, making it suitable for real-time predictions. The fundamental idea is the forecast of water depth time series within manholes based on the given rainfall. The novelty lies in the consideration of uncertainty through the ensemble structure for which the numbers of neurons in the hidden layer, the weights, and biases are considered to be uncertain. The results are evaluated based on observed values captured within the uncertainty band ), and the width of the band ). The varied between 74% and 94% and the between 1.36 and 10.68.
摘要:在一定的降雨强度以上,暴雨超载事件是不可避免的。因此,对于保护和减轻损害,预测系统具有突出的重要性。本研究开发了一个综合预测系统(EFS)来预测下水道超载事件的开始和结束。它将具有外生输入的非线性自回归(NARX)网络应用于集成的每个成员,使其适用于实时预测。其基本思想是根据给定的降雨量预测检修孔内的水深时间序列。新颖之处在于通过集成结构考虑了不确定性,其中隐藏层中神经元的数量、权重和偏差被认为是不确定的。基于在不确定度带内捕获的观测值和带的宽度来评估结果。在74%和94%之间变化,在1.36和10.68之间变化。
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引用次数: 0
Sedimentation in heavy laden urban combined sewer conduits using a multi-phase Eulerian-Eulerian model 使用多相欧拉-欧拉模型的重载城市组合下水道中的沉降
IF 2.7 3区 环境科学与生态学 Q3 WATER RESOURCES Pub Date : 2023-07-21 DOI: 10.1080/1573062X.2023.2229289
M. Monadi, M. Mohammadi
ABSTRACT To investigate the sedimentation through urban wastewater pipelines a semicircular polyethylene pipeline of diameter 0.40 m and length 18 m in nearly horizontal orientation with a longitudinal slope of 0.01 for a discharge capacity of 0.0147 m3/s and a volumetric flow concentration of 30% has been used. The solid phase consists of three different particle sizes i.e. 0.25 × 10−3m, 0.35 × 10−3 m and 0.50 × 10−3m with the greatest frequency in the wastewater flow being a density of 2650 kg/m3. The flow has been simulated by Ansys-Fluent (2020) software. The effects of particle size on various slurry flow parameters such as pressure drop, solid phase velocity distribution, friction factor, granular pressure, turbulent viscosity, turbulent kinetic energy and its dissipation all have been analyzed. The location of maximum deposition is also determined and it occurred at x/R = 77.5. Finally, a relationship between the thickness of sedimentation and volume concentration has been proposed.
摘要为研究城市污水管道的沉降问题,采用直径0.40 m、长18 m、纵向坡度为0.01、流量为0.0147 m3/s、体积流浓度为30%的半圆形聚乙烯管道进行研究。固相由三种不同粒径组成,即0.25 × 10 - 3m、0.35 × 10 - 3m和0.50 × 10 - 3m,在废水流中出现的频率最高,密度为2650 kg/m3。采用Ansys-Fluent(2020)软件对流程进行了模拟。分析了粒径对料浆流动参数如压降、固相速度分布、摩擦系数、颗粒压力、湍流粘度、湍流动能及其耗散的影响。最大沉积发生在x/R = 77.5处。最后,提出了沉降厚度与体积浓度之间的关系。
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引用次数: 0
Resilience assessment of water distribution networks exposed to substance intrusion 受物质入侵影响的配水管网弹性评估
IF 2.7 3区 环境科学与生态学 Q3 WATER RESOURCES Pub Date : 2023-07-21 DOI: 10.1080/1573062X.2023.2237944
E. Rokstad, C. Makropoulos, M. M. Rokstad
ABSTRACT Resilience in water distribution systems is the ability to detect, respond and recover from disruptive events and calamities, such as extreme weather, natural disasters, human errors, and malicious attacks. A system’s resilience can be influenced by its topology. This study applies a novel network generation procedure based on the C-town benchmark network to produce 296 network variants with similar structures yet unique topological features. Then, a stress-testing procedure is applied to expose these variants to a set of substance intrusion scenarios. Finally, their performance is ranked according to a set of resilience metrics, and their relationship to the network design is evaluated based on topological attributes through correlation analysis. The results suggest that specific topological attributes, often characterized as a branched network design, tend to be more resilient when exposed to quality-related failures. As such, it provides insights into the relationship between topology and resilience of water distribution systems.
摘要配水系统的弹性是指能够检测、响应和恢复破坏性事件和灾难,如极端天气、自然灾害、人为错误和恶意攻击。系统的弹性可能受到其拓扑结构的影响。本研究应用了一种基于C镇基准网络的新型网络生成程序,生成了296个结构相似但拓扑特征独特的网络变体。然后,应用压力测试程序将这些变体暴露在一组物质入侵场景中。最后,根据一组弹性指标对其性能进行排名,并通过相关性分析基于拓扑属性评估其与网络设计的关系。结果表明,特定的拓扑属性,通常被描述为分支网络设计,在暴露于质量相关故障时往往更具弹性。因此,它可以深入了解配水系统的拓扑结构和弹性之间的关系。
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引用次数: 0
A transdisciplinary approach for assessing the potential feasibility of Sustainable Urban Drainage Systems: case study, Bogotá, Colombia 评估可持续城市排水系统潜在可行性的跨学科方法:案例研究,哥伦比亚波哥大
IF 2.7 3区 环境科学与生态学 Q3 WATER RESOURCES Pub Date : 2023-07-20 DOI: 10.1080/1573062X.2023.2233494
A. D. Ortega Sandoval, J. P. Rodríguez Sánchez, L. Bharati
ABSTRACT Rapid population growth and urban sprawl have expanded built-up areas, affecting flood patterns in cities. Sustainable urban drainage systems (SUDS) have gained significant attention by attempting to replicate natural pre-development drainage conditions. This paper presents a new transdisciplinary methodology for assessing the potential feasibility of 12 different SUDS typologies by considering physical restrictions and six types of contextual barriers. The approach integrates input from academic and non-academic actors, fuzzy logic, geographic information system tools, and multi-criteria decision analysis. A neighborhood in Bogotá, Colombia, was selected as the unit of analysis, framing a relevant case study for highly urbanized areas. The findings demonstrate the differential impact of local context constraints and emphasize the importance of comprehensive approaches to SUDS planning that consider criteria other than technical. The methodology is a tool to support architects, engineers, urban planners, and urban water decision-makers in the planning of sustainable and flood-resilient cities.
人口的快速增长和城市的蔓延扩大了建成区,影响了城市的洪水模式。可持续城市排水系统(SUDS)通过尝试复制自然的开发前排水条件而获得了极大的关注。本文提出了一种新的跨学科方法,通过考虑物理限制和六种类型的环境障碍来评估12种不同SUDS类型的潜在可行性。该方法集成了来自学术和非学术参与者、模糊逻辑、地理信息系统工具和多标准决策分析的输入。哥伦比亚波哥大的一个社区被选为分析单元,为高度城市化地区构建了一个相关的案例研究。研究结果显示了当地环境限制的不同影响,并强调了考虑技术以外标准的综合方法对sud规划的重要性。该方法是支持建筑师、工程师、城市规划者和城市水决策者规划可持续和抗洪城市的工具。
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引用次数: 0
Uncertainties in different leak localization methods for water distribution networks: a review 配水管网不同泄漏定位方法的不确定性综述
IF 2.7 3区 环境科学与生态学 Q3 WATER RESOURCES Pub Date : 2023-07-13 DOI: 10.1080/1573062X.2023.2229301
P. Mohan Doss, M. M. Rokstad, D. Steffelbauer, F. Tscheikner-Gratl
ABSTRACT In recent decades, research on leak detection and localization in water distribution networks has been an area of growing interest in both water management and fault detection. In the literature, numerous leak localization techniques were developed from model-based methods (such as steady-state and quasi-steady state) and data-driven/machine learning models (e.g. time series modeling, prediction, and classification). However, there is still a need for study on the definition and enumeration of various sources, types, and nature of uncertainties in leak localization modelling processes. In the context of steady-state analysis, this review paper’s main objective is to list the uncertainties related to model-based, data-driven and hybrid methods. This review outlines that, for the three classes of methods, the interplay of uncertainties with the modelling approximations jointly influences the localization performance and are often overlooked. Furthermore, realization of modelling assumptions and error propagation is needed for a successful real-world implementation.
摘要近几十年来,配水管网中的泄漏检测和定位研究一直是水管理和故障检测领域的一个日益关注的领域。在文献中,许多泄漏定位技术是从基于模型的方法(如稳态和准稳态)和数据驱动/机器学习模型(如时间序列建模、预测和分类)发展而来的。然而,仍然需要研究泄漏定位建模过程中各种来源、类型和不确定性性质的定义和列举。在稳态分析的背景下,本文的主要目标是列出与基于模型、数据驱动和混合方法相关的不确定性。这篇综述概述了,对于这三类方法,不确定性与建模近似的相互作用共同影响定位性能,并且经常被忽视。此外,要想在现实世界中成功实施,需要实现建模假设和误差传播。
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引用次数: 0
Quantitative study of water impact on land value in Jakarta 雅加达水资源对土地价值影响的定量研究
IF 2.7 3区 环境科学与生态学 Q3 WATER RESOURCES Pub Date : 2023-07-11 DOI: 10.1080/1573062X.2023.2233489
A. Gamal, Lailatul Rohmah, Cynthia Adelina Perangin Angin, Widya Laksmi Larasati, Ahmad Aki Muhaimin, Risty Khoirunisa, Dwinanti Rika Marthanty
ABSTRACT This research tries to fill the gap of empirical studies to demonstrate how water, both in terms of its role as a resource and disaster, is integrally related to the value of land. This study involves four water-related measures categories: source, disaster, supply, and infrastructure. The eight independent variables were tested upon Jakarta’s 3,725 land value zone samples. It is found that areas with more accessibility to wastewater management infrastructure have land value of IDR 476 per square meter higher than average. In contrast, land value in areas with higher risk of being affected by a flood is IDR 470.91 per square meter lower than average. This research signifies the importance of integral policy of clean water provision as well as water-related disaster prevention in urban areas.
本研究试图填补实证研究的空白,以证明水作为资源和灾害的角色如何与土地价值整体相关。本研究涉及四种与水有关的措施类别:水源、灾害、供应和基础设施。这八个自变量在雅加达的3725个土地价值区样本上进行了测试。研究发现,污水处理基础设施可达性较高的地区,其土地价值比平均水平高476印尼盾/平方米。相比之下,受洪水影响风险较高地区的土地价值比平均水平低470.91印尼盾/平方米。这一研究表明,在城市地区提供清洁水和水相关灾害预防的综合政策的重要性。
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引用次数: 0
Performance Assessment Method for Small- and Medium-Sized Urban Water Systems: Development and Implementation 中小城市供水系统性能评价方法的开发与实施
IF 2.7 3区 环境科学与生态学 Q3 WATER RESOURCES Pub Date : 2023-07-05 DOI: 10.1080/1573062X.2023.2229298
S. R. Pokhrel, Gyan Chhipi-Shrestha, Haroon R. Mian, Kasun Hewage, R. Sadiq
ABSTRACT Performance assessment of Small and Medium-Sized Water Systems (SMWSs) is important for operational, tactical, and strategic decision-making. In this study, a performance assessment method has been developed and applied to five drinking water, three wastewater, and two stormwater utilities using 39, 30 and 27 Key Performance Indicators (KPIs) in a semi-arid region. The KPIs were aggregated to determine a performance index using a Technique for Order of Preference by Similarity to Ideal Solution method. K-nearest neighbors and penalty methods were used to estimate missing KPIs data. The results indicated that only two drinking water utilities and one wastewater utility had been rated as ‘high’ performance. None of the utilities in stormwater performance was rated as ‘high’. The developed method can assist decision-makers in evaluating SMWSs performance holistically, build operational management strategies, and identify necessary interventions in overcoming water systems challenges across each urban water system component.
中小型供水系统(SMWS)的性能评估对于作战、战术和战略决策非常重要。在本研究中,使用39、30和27个关键绩效指标(KPI),开发了一种绩效评估方法,并将其应用于半干旱地区的五个饮用水、三个废水和两个雨水公用设施。使用与理想解决方案相似的偏好顺序技术方法汇总KPI以确定绩效指数。使用K近邻和惩罚方法来估计遗漏的KPI数据。结果表明,只有两个饮用水公用设施和一个废水公用设施被评为“高”性能。在雨水性能方面,没有任何公用设施被评为“高”。所开发的方法可以帮助决策者全面评估SMWSs的绩效,制定运营管理战略,并确定克服每个城市供水系统组成部分的供水系统挑战的必要干预措施。
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引用次数: 0
An exploratory methodology based on high resolution remote sensing techniques for soil moisture determination with prospective applications in vegetative SuDS 基于高分辨率遥感技术的土壤水分测定探索方法及其在植被SuDS中的应用前景
IF 2.7 3区 环境科学与生态学 Q3 WATER RESOURCES Pub Date : 2023-06-28 DOI: 10.1080/1573062X.2023.2229292
C. Allende-Prieto, J. Roces-García, C. Recondo, L. A. Sañudo-Fontaneda, M. R. González-Moradas
ABSTRACT Sustainable Drainage Systems (SuDS) monitoring is very often intrusive and need onsite personnel to be carried out. The application of remote sensing in SuDS still is an area for further development, especially in vegetation-based techniques, representing a gap in the field. This research proposes an exploratory method combining Synthetic Aperture Radar (SAR) images data and onsite measurements to develop models of performance. Linear regression models were obtained for the computing of the soil moisture using the following variables: backscatter coefficient (σ°), temperature, normalized difference vegetation index (NDVI) and topographic wetness index (TWI), reaching medium to high values for its predictive capacity, ranging from 0.53 and 0.66 using σ° and temperature. The most influential variable was found to be the temperature. This investigation opens the path for future research in the use of remote sensing tools in vegetation-based SuDS monitoring with homogeneous plant species, highlighting the need for further research.
可持续排水系统(SuDS)监测通常是侵入性的,需要现场人员进行。遥感技术在土地利用系统中的应用仍然是一个有待进一步发展的领域,特别是基于植被的技术,在该领域还存在空白。本研究提出了一种结合合成孔径雷达(SAR)图像数据和现场测量数据的探索性方法来建立性能模型。利用后向散射系数(σ°)、温度、归一化植被指数(NDVI)和地形湿度指数(TWI)建立了土壤湿度的线性回归模型,其预测能力达到中高值,σ°和温度的预测范围为0.53 ~ 0.66。研究发现,影响最大的变量是温度。该研究为未来利用遥感工具进行基于植被的均匀植物SuDS监测开辟了道路,强调了进一步研究的必要性。
{"title":"An exploratory methodology based on high resolution remote sensing techniques for soil moisture determination with prospective applications in vegetative SuDS","authors":"C. Allende-Prieto, J. Roces-García, C. Recondo, L. A. Sañudo-Fontaneda, M. R. González-Moradas","doi":"10.1080/1573062X.2023.2229292","DOIUrl":"https://doi.org/10.1080/1573062X.2023.2229292","url":null,"abstract":"ABSTRACT Sustainable Drainage Systems (SuDS) monitoring is very often intrusive and need onsite personnel to be carried out. The application of remote sensing in SuDS still is an area for further development, especially in vegetation-based techniques, representing a gap in the field. This research proposes an exploratory method combining Synthetic Aperture Radar (SAR) images data and onsite measurements to develop models of performance. Linear regression models were obtained for the computing of the soil moisture using the following variables: backscatter coefficient (σ°), temperature, normalized difference vegetation index (NDVI) and topographic wetness index (TWI), reaching medium to high values for its predictive capacity, ranging from 0.53 and 0.66 using σ° and temperature. The most influential variable was found to be the temperature. This investigation opens the path for future research in the use of remote sensing tools in vegetation-based SuDS monitoring with homogeneous plant species, highlighting the need for further research.","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"20 1","pages":"1006 - 1020"},"PeriodicalIF":2.7,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42980488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Deliberate stakeholder engagement: a framework of considerations for integrated asset management of water utilities 审慎的利益相关者参与:水务公司综合资产管理的考虑框架
IF 2.7 3区 环境科学与生态学 Q3 WATER RESOURCES Pub Date : 2023-06-28 DOI: 10.1080/1573062X.2023.2229291
N. van Aalderen, S. Brouwer, S. Koop, D. Hegger, Heleen L. P. Mees
ABSTRACT The importance of stakeholder engagement in asset management is widely accepted and emphasised. Nonetheless, in asset management practice, stakeholder engagement is still often applied in an unsystematised and ad hoc manner. By proposing a framework of considerations for the deliberate design of stakeholder engagement, this study aims to contribute to the realisation of integrated asset management by offering a means to explicate the often implicit considerations regarding stakeholder engagement. By providing a conceptual exploration, as well as an analysis of three asset management cases in the Netherlands, this article provides building blocks for deliberate stakeholder engagement, guided by consideration of the mission, local context, and available time. Taking the daily reality of asset managers as a reference, this study develops a synthesis between literature on stakeholder engagement and asset management, hereby showing that both material and relational considerations should be made deliberately in all phases of an asset management project.
摘要利益相关者参与资产管理的重要性已被广泛接受和强调。尽管如此,在资产管理实践中,利益相关者的参与仍然经常以非系统和临时的方式应用。通过为利益相关者参与的审慎设计提出一个考虑因素框架,本研究旨在通过提供一种方法来解释利益相关者介入的隐含考虑因素,为实现综合资产管理做出贡献。通过对荷兰的三个资产管理案例进行概念探索和分析,本文在考虑任务、当地环境和可用时间的指导下,为利益相关者的深思熟虑提供了基础。本研究以资产管理者的日常现实为参考,综合了利益相关者参与和资产管理的文献,从而表明在资产管理项目的所有阶段都应该有意识地考虑物质和关系因素。
{"title":"Deliberate stakeholder engagement: a framework of considerations for integrated asset management of water utilities","authors":"N. van Aalderen, S. Brouwer, S. Koop, D. Hegger, Heleen L. P. Mees","doi":"10.1080/1573062X.2023.2229291","DOIUrl":"https://doi.org/10.1080/1573062X.2023.2229291","url":null,"abstract":"ABSTRACT The importance of stakeholder engagement in asset management is widely accepted and emphasised. Nonetheless, in asset management practice, stakeholder engagement is still often applied in an unsystematised and ad hoc manner. By proposing a framework of considerations for the deliberate design of stakeholder engagement, this study aims to contribute to the realisation of integrated asset management by offering a means to explicate the often implicit considerations regarding stakeholder engagement. By providing a conceptual exploration, as well as an analysis of three asset management cases in the Netherlands, this article provides building blocks for deliberate stakeholder engagement, guided by consideration of the mission, local context, and available time. Taking the daily reality of asset managers as a reference, this study develops a synthesis between literature on stakeholder engagement and asset management, hereby showing that both material and relational considerations should be made deliberately in all phases of an asset management project.","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"20 1","pages":"995 - 1005"},"PeriodicalIF":2.7,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46527414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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Urban Water Journal
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