A novel method for rapid inspection of sewer networks: combining acoustic and optical means

Plihal, Hanns; Kretschmer, Florian; Ali, Murtiza; See, Chan Hwang; Romanova, Anna; Horoshenkov, Kirill V.; Ertl, Thomas

doi:10.1080/1573062x.2015.1076857

Cited by 22 publications

(16 citation statements)

References 10 publications

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“…When the critical elements are known, hydraulic properties of the sewer system at these locations can be monitored to safeguard performance [20]. If no monitoring equipment is available, rapid and cost-effective inspection methods, such as a manhole-zoom camera and the Sewerbatt instrument, can be used to examine the sewer condition more often and to determine whether maintenance is necessary [41].…”

Section: Discussionmentioning

confidence: 99%

Quantitative Impact Assessment of Sewer Condition on Health Risk

Bijnen

Korving

Langeveld

et al. 2018

Water

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Abstract:Due to a variety of contaminants in floodwater, exposure to urban pluvial flooding may pose a health risk to humans. In-sewer defects may cause increased pluvial flooding, possibly increasing health risks. This paper addresses the impact of in-sewer defects on urban pluvial flooding and, subsequently, on infection probabilities for humans. As such, it provides a necessary input for risk-informed sewer maintenance strategies in order to preserve the hydraulic performance of a sewer system. Critical locations in sewer networks can be safeguarded through detecting changes in hydraulic properties of the sewer system, by using monitoring equipment or alternative inspection methods. Two combined sewer systems in The Netherlands with different characteristics are studied. The catchment-wide average infection probability was calculated using Quantitative Microbial Risk Assessment (QMRA) and flooding frequencies from Monte Carlo simulations with a hydrodynamic model. For the studied catchments, it is concluded that the occurrence of flooding is significantly affected by sediment deposits and, consequently, the infection probability as well. The impact of sediment deposits on infection probabilities depends on sewer systems characteristics and varies within the catchment. The results in this paper also demonstrate that further research on the relationship between flood duration and infection probabilities is required.

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Section: Discussionmentioning

confidence: 99%

Quantitative Impact Assessment of Sewer Condition on Health Risk

Bijnen

Korving

Langeveld

et al. 2018

Water

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“…Horoshenkov, Long, and Tait 2010) and manhole camera zoom techniques (e.g. Plihal et al 2016) have been proposed. However, since these technologies are not included in standards yet, the application in practice is still limited.…”

Section: Alternative Inspection Techniquesmentioning

confidence: 99%

Sewer asset management – state of the art and research needs

Tscheikner-Gratl

Caradot

Cherqui

et al. 2019

Urban Water Journal

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Sewer asset management gained momentum and importance in recent years due to economic considerations, since infrastructure maintenance and rehabilitation directly represent major investments. Because physical urban water infrastructure has life expectancies of up to 100 years or more, contemporary urban drainage systems are strongly influenced by historical decisions and implementations. The current decisions taken in sewer asset management will, therefore, have a long-lasting impact on the functionality and quality of future services provided by these networks. These decisions can be supported by different approaches ranging from various inspection techniques, deterioration models to assess the probability of failure or the technical service life, to sophisticated decision support systems crossing boundaries to other urban infrastructure. This paper presents the state of the art in sewer asset management in its manifold facets spanning a wide field of research and highlights existing research gaps while giving an outlook on future developments and research areas.

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“…KARO and PIRAT systems are other multi-sensor inspection methods that can automatically interpret and categorize defects in sewer pipelines [15]. INNOKANIS project introduces a novel tool by combining zoom camera and the acoustic technology SewerBatt that integrates optical and acoustic device as an alternative to conventional CCTV [16].…”

Section: Hybrid Technologiesmentioning

confidence: 99%

Review on Computer Aided Sewer Pipeline Defect Detection and Condition Assessment

2019

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Physical and operational inspection of sewer pipelines is critical to sustaining an acceptable level of system serviceability. Emerging inspection tools in addition to developments in sensor and lens technologies have facilitated sewer condition assessment and increased the quality and consistency of provided data. Meanwhile, sewer networks are too vast to be adequately investigated manually so the development of innovative computer vision techniques for automation applications has become an interest point of recent studies. This review paper presents the current state of inspection technology practices in sewer pipelines. An overall inspection tool comparison was conducted and the advantages and disadvantages of each method were discussed. This was followed by a comprehensive review of recent studies on visual inspection automation using computer vision and machine learning techniques. Finally, current achievements and limitations of existing automation methods were debated to outline open challenges and future research for both infrastructure management and computer science researchers.

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A novel method for rapid inspection of sewer networks: combining acoustic and optical means

Cited by 22 publications

References 10 publications

Quantitative Impact Assessment of Sewer Condition on Health Risk

Quantitative Impact Assessment of Sewer Condition on Health Risk

Sewer asset management – state of the art and research needs

Review on Computer Aided Sewer Pipeline Defect Detection and Condition Assessment

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