Comparative analysis of sewer physical condition grading protocols for the City of Edmonton

KhazraeializadehSoroush,; GayLeon, F; BayatAlireza,

doi:10.1139/cjce-2014-0077

Cited by 14 publications

(6 citation statements)

References 6 publications

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“…Therefore, the National Standardization Administration in China recently issued a project to update the protocol. In order to minimize the inaccuracy of sewer condition assessment, as a first step, it is necessary to make compressive comparisons between different protocols to gain a better understanding of the main reasons causing the different evaluation results and then to choose a better and more suitable protocol as a reference when updating the protocol [7,8].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Four Sewer Condition Assessment Protocols Based on Field Data

Cao,

Guo,

Wei

et al. 2023

Water

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In order to better plan new or update sewer pipe condition assessment protocols, this paper presents systematic comparisons of four of the most widely used sewer condition assessment protocols, including the fourth edition of the Sewer Rehabilitation Manual (SRM-4) in the UK, the Pipeline Assessment and Certification Program (PACP) in America, the Sewer Physical Condition Grading Protocols (SPCCM) in Canada, and the Technical Specification for Inspection and Evaluation of Urban Sewer (TSIEUR) in China. In the qualitative comparison, the defects categories, deduct values, and assessment methods of the four protocols are analyzed. A new concept of defect weight is firstly introduced to make comparisons between protocols applicable and easy; in the quantitative comparison, the protocols are used to evaluate the same 182 sewer pipe segments based on field data and the assessment results are compared. It is found that the main reasons for the different evaluation results are due to the different defect weights and evaluation methods used. Finally, PACP shows obvious advantages and is recommended for asset managers when making new or updating protocols in the future.

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Section: Introductionmentioning

confidence: 99%

Comparison of Four Sewer Condition Assessment Protocols Based on Field Data

Cao,

Guo,

Wei

et al. 2023

Water

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“…The important factor of sewer system management is to allocate a budget for various activities including the inspection, repair, and maintenance of sewer pipes [1]. Since the cost of maintaining the sewer network must be balanced with the costs of other operations, prioritization is considered the most effective strategy [3]. Asset management is a formal system for determining the most cost-effective methods of sustaining the appropriate service level in the social infrastructure system [4].…”

Section: Introductionmentioning

confidence: 99%

“…There have been many studies on condition grading protocols for sewer pipelines including protocol comparison [3,6,7]. Canada's National Research Council (NRC) reported its comparisons of various condition grading protocols, including the WRc protocol and the protocol it developed in Edmonton and Winnipeg [8].…”

Section: Introductionmentioning

confidence: 99%

“…Canada has substituted the first edition of the internally developed Canadian infrastructure report card, which updates current sewer pipeline conditions, for the condition report [9,10]. Some cities that used the WRc protocol in the past are now using their own internally developed protocols, and the NRC reported that it was interesting to compare the internally developed protocols with the WRc protocol [3]. MOE recently cited the New Zealand protocol in developing a protocol including the structural and operational defect code and score in order to rate the sewer pipeline according to its internal condition [11].…”

Section: Introductionmentioning

confidence: 99%

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Comparison of two sewer condition assessment protocols in S. Korea

Shin¹,

Han

Hwang

2016

Desalination and Water Treatment

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A B S T R A C TThe operation and management of social infrastructures can create significant headaches for municipal governments. Sewer systems are no exception, and prioritizing plans and strategies for asset management is usually adopted as a cost-effective solution. The condition assessment, which is an important element of asset management, provides current information about the condition of municipal facilities. Condition assessments were first used by Water Research Centre (WRc) in the UK, the country with the longest history of sewer management, and are now widely used in many countries. Korea uses the condition assessment protocol developed by the Ministry of Environment (MOE), but as this protocol does not fully reflect the underground environment in Korea, the assessments and judgments are ambiguous. The sewer condition assessment and rehabilitation decision-making (SCARD) program developed by this study is based on the MOE protocol with the defect items, score, and condition grading system modified in consideration of the type of buried pipelines in Korea. To compare the assessment results produced by these two protocols, a closed-circuit television inspection was performed on 11 km of sewer pipeline in the sampled area in P city. The inspection indicated that SCARD set a higher score of structural defects common to both protocols for items that affect the collapse mechanism (fracture, damage, etc.). The amount of pipeline that received a grade of five for internal condition rating of identified structure defects was 45% with the MOE protocol, which was much higher than the 0.6% given with SCARD. This result showed that there was a big difference between the two protocols in condition grade evaluations of structural defects. In the future, the findings of this study can be used to develop an objective protocol reflecting actual sewer pipeline conditions.

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“…Moreover, a lot of cities do not have data on the previous condition but also on the current sewer situation, which makes it impossible to assess the priorities of reconstruction [80] and, thus, makes the accuracy of the required maintenance budget more difficult. The task of determining the budget is a major problem in all sewer system maintenance activities [81]. One big challenge is that sewer pipes are underground, and it is very difficult to detect pipes that have an increased risk of cracks or of a malfunction of some other types.…”

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confidence: 99%

Challenges in Sewer System Maintenance

Obradović

Šperac

Marenjak³

2023

Encyclopedia

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A sewer system is an important infrastructure of every settlement. A sewer system is a set of construction facilities used for the quick removal of wastewater from the humans’ immediate environment and its transport to a wastewater treatment plant or direct discharge into an appropriate recipient. In order for the sewer system to perform its purpose properly, its proper maintenance is required. Maintenance of a sewer system is very demanding since the system is mostly underground which makes it difficult to be accessed and maintained. The maintenance of a sewer system can be preventive (regular) or corrective (reactive). The regular maintenance occurs at certain intervals, whereas the reactive maintenance occurs in the case of some unforeseen event. This paper presents the history of sewer systems, as well as basic and alternative types of sewer systems. Furthermore, challenges that arise during sewer system maintenance and difficulties that maintenance employees face in their work are presented in this paper, as well as the ways in which sewer systems are maintained.

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Comparative analysis of sewer physical condition grading protocols for the City of Edmonton

Cited by 14 publications

References 6 publications

Comparison of Four Sewer Condition Assessment Protocols Based on Field Data

Comparison of Four Sewer Condition Assessment Protocols Based on Field Data

Comparison of two sewer condition assessment protocols in S. Korea

Challenges in Sewer System Maintenance

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