A coupled approach for the three-dimensional simulation of pipe leakage in variably saturated soil

Peche, Aaron; Graf, Thomas; Fuchs, Lothar; Neuweiler, Insa

doi:10.1016/j.jhydrol.2017.10.050

Cited by 28 publications

(19 citation statements)

References 29 publications

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“…Internal systems denote drinking, sanitary, industrial, and heating piped water, while external systems denote precipitation, overland flow, infiltration, soil moisture, and groundwater. While these systems can be considered separate, many urban centers with old sewer systems have leakage along the supply pipes and sanitary pipes and/or have combined stormwater and sewer systems [ 82 , 83 , 84 , 85 ]. The high degree of modification of urban areas often creates environments controlled by anthropogenic modifications.…”

Section: Voc Transport Pathwaysmentioning

confidence: 99%

“…An integrated urban water modeling approach can be employed to assess various components, as well as their interactions in human–hydrologic systems [ 71 , 74 , 86 , 87 ]. An urban water budget which uses a water mass balance for specified time and space can provide: (1) a framework to study the links between various elements of urban water [ 82 , 83 , 84 , 85 , 86 , 87 , 88 ]; (2) insight into the neighborhood or localized groundwater flow, and (3) a quantitative estimate for urban recharge [ 72 ]. Cities with a rich industrial legacy, such as Detroit, face many environmental concerns, including subsurface contamination [ 89 ].…”

Section: Voc Transport Pathwaysmentioning

confidence: 99%

See 1 more Smart Citation

A Review of Volatile Organic Compound Contamination in Post-Industrial Urban Centers: Reproductive Health Implications Using a Detroit Lens

Miller

Runge‐Morris

Cassidy‐Bushrow

et al. 2020

IJERPH

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Volatile organic compounds (VOCs) are a group of aromatic or chlorinated organic chemicals commonly found in manufactured products that have high vapor pressure, and thus vaporize readily at room temperature. While airshed VOCs are well studied and have provided insights into public health issues, we suggest that belowground VOCs and the related vapor intrusion process could be equally or even more relevant to public health. The persistence, movement, remediation, and human health implications of subsurface VOCs in urban landscapes remain relatively understudied despite evidence of widespread contamination. This review explores the state of the science of subsurface movement and remediation of VOCs through groundwater and soils, the linkages between these poorly understood contaminant exposure pathways and health outcomes based on research in various animal models, and describes the role of these contaminants in human health, focusing on birth outcomes, notably low birth weight and preterm birth. Finally, this review provides recommendations for future research to address knowledge gaps that are essential for not only tackling health disparities and environmental injustice in post-industrial cities, but also protecting and preserving critical freshwater resources.

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Section: Voc Transport Pathwaysmentioning

confidence: 99%

Section: Voc Transport Pathwaysmentioning

confidence: 99%

A Review of Volatile Organic Compound Contamination in Post-Industrial Urban Centers: Reproductive Health Implications Using a Detroit Lens

Miller

Runge‐Morris

Cassidy‐Bushrow

et al. 2020

IJERPH

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“…In the simulation, the nonlinear spring (soil spring) with damper was used to simulate the coupling between the pipe and soil. [9][10][11][12][13] By setting the spring stiffness and damping coefficient, the soil supporting the pipeline can be simulated. In order to facilitate the analysis and calculation, following assumptions were made in this study:…”

Section: Contact Settingmentioning

confidence: 99%

“…The stiffness coefficient of each is shown in Table 1. 12,22 Under different soil spring stiffness values, the corresponding first natural frequency of the well-supported and the free-spanning segments is shown in Figure 9.…”

Section: Influence Of Soil Spring Stiffness On Detectionmentioning

confidence: 99%

Vibration response analysis of free-spanning pipeline based on inner pipe excitation signal

Zhang

Lü

Cui

et al. 2018

Advances in Mechanical Engineering

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Pipeline is important for gas transportation. Free span of buried pipeline may cause safety problem as a result of decreasing the load-carrying capacity of the pipeline. A method for detecting the free span of buried pipelines based on the inner pipe excitation signal was proposed. Vibration characteristics analysis of the pipe and its surrounding coupling system were discussed by means of the finite element method. A three-dimensional pipe model containing a free-spanning segment with a certain length was established. Transient dynamic response analysis was adopted. Frequency response function plots were generated to analyze the results of simulation. The effects of soil type, the length of the free-spanning segment, and the excitation signal on detection were studied. The results show that (1) the obvious change of the first natural frequency of the pipe with different surroundings can be used to detect the free-spanning segment of pipeline; (2) the harder the soil medium is, the higher the first natural frequency of the pipe and soil surrounding system will be; (3) the longer the length of the free-spanning segment is, the lower the first natural frequency will be.

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“…Sewer exfiltration models have been introduced in recent decades to support management of ageing sewer infrastructures and to predict the potential threats of water resource contamination in urban catchments (Yang et al 1999 ; Karpf et al 2009 ; Peche et al 2017 ). The Pipeline Leakage Model (PLM) (Burn et al 2007 ) was developed to estimate the water leakage for single pipe segments and showed potential to differentiate sewer exfiltration losses under different pipe and soil conditions (Ellis and Bertrand-Krajewski 2010 ; Wolf et al 2006 ; Wolf et al 2012 ).…”

Section: Introductionmentioning

confidence: 99%

Harmonized assessment of nutrient pollution from urban systems including losses from sewer exfiltration: a case study in Germany

Nguyen

Venohr

2021

Environ Sci Pollut Res

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A growing literature indicates that untreated wastewater from leaky sewers stands among major sources of pollution to water resources of urban systems. Despite that, the quantification and allocation of sewer exfiltration are often restricted to major pipe areas where inspection data are available. In large-scale urban models, the emission from sewer exfiltration is either neglected (particularly from private sewers) or represented by simplified fixed values, and as such its contribution to the overall urban emission remains questionable. This study proposes an extended model framework which incorporates sewer exfiltration pathway in the catchment model for a better justified pollution control and management of urban systems at a nationwide scale. Nutrient emission from urban areas is quantified by means of the Modelling of Nutrient Emissions in River Systems (MONERIS) model. Exfiltration is estimated for public and private sewers of different age groups in Germany using the verified methods at local to city scales, upscaling techniques, and expert knowledge. Results of this study suggest that the average exfiltration rate is likely to be less than 0.01 L/s per km, corresponding to approximately 1 mm/m/year of wastewater discharge to groundwater. Considering the source and age factors, the highest rate of exfiltration is defined in regions with significant proportions of public sewers older than 40 years. In regions where public sewers are mostly built after 1981, the leakage from private sewers can be up two times higher than such from public sewers. Overall, sewer exfiltration accounts for 9.8% and 17.2% of nitrate and phosphate loads from urban systems emitted to the environment, which increases to 11.2% and 19.5% in the case of no remediation scenario of projected defective sewer increases due to ageing effects. Our results provide a first harmonized quantification of potential leakage losses in urban wastewater systems at the nationwide scale and reveal the importance of rehabilitation planning of ageing sewer pipes in public and private sewer systems. The proposed model framework, which incorporates important factors for urban sewer managers, will allow further targeting the important data need for validating the approach at the regional and local scales in order to support better strategies for the long-term nutrient pollution control of large urban wastewater systems.

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A coupled approach for the three-dimensional simulation of pipe leakage in variably saturated soil

Cited by 28 publications

References 29 publications

A Review of Volatile Organic Compound Contamination in Post-Industrial Urban Centers: Reproductive Health Implications Using a Detroit Lens

A Review of Volatile Organic Compound Contamination in Post-Industrial Urban Centers: Reproductive Health Implications Using a Detroit Lens

Vibration response analysis of free-spanning pipeline based on inner pipe excitation signal

Harmonized assessment of nutrient pollution from urban systems including losses from sewer exfiltration: a case study in Germany

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