Expert System for Prioritizing the Inspection of Sewers: Knowledge Base Formulation and Evaluation

Hahn, Margaret A.; Palmer, Richard N.; Merrill, M. Steve; Lukas, Andy

doi:10.1061/(asce)0733-9496(2002)128:2(121)

Cited by 73 publications

(22 citation statements)

References 3 publications

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“…Suppose the total cost for the adaptation of MA-T2 and Gan-T1 allow maximum of 6 million Yuan and 13 million Yuan, respectively. Then, the volume of M1 and M2 for the MA-T2 are set as 1500 m 3 and 1000 m 3 . Similarly, 3000 m 3 and 4000 m 3 are for G1 and G2.…”

Section: Storage Tank Provisionmentioning

confidence: 99%

“…Urban drainage systems are an increasingly important part of urban infrastructure that conveys stormwater and wastewater away from urban areas and contributes to the general well-being of the urban population [1][2][3][4][5][6]. However, there are pressing challenges in design and operation of urban drainage systems due to climate change, urbanization, population increase and demographic change.…”

Section: Introductionmentioning

confidence: 99%

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Vulnerability Analysis of Urban Drainage Systems: Tree vs. Loop Networks

et al. 2017

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Vulnerability analysis of urban drainage networks plays an important role in urban flood management. This study analyzes and compares the vulnerability of tree and loop systems under various rainfall events to structural failure represented by pipe blockage. Different pipe blockage scenarios, in which one of the pipes in an urban drainage network is assumed to be blocked individually, are constructed and their impacts on the network are simulated under different storm events. Furthermore, a vulnerability index is defined to measure the vulnerability of the drainage systems before and after the implementation of adaptation measures. The results obtained indicate that the tree systems have a relatively larger proportion of critical hydraulic pipes than the loop systems, thus the vulnerability of tree systems is substantially greater than that of the loop systems. Furthermore, the vulnerability index of tree systems is reduced after they are converted into a loop system with the implementation of adaptation measures. This paper provides an insight into the differences in the vulnerability of tree and loop systems, and provides more evidence for development of adaptation measures (e.g., tanks) to reduce urban flooding.

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Section: Storage Tank Provisionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Vulnerability Analysis of Urban Drainage Systems: Tree vs. Loop Networks

et al. 2017

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“…33 The AwwaRF sponsored a project that used this method to collect data on 20 U.S. water utilities, and this led to needs estimates reported in Chapter 1.…”

Section: Renewal: the 3rs Of Infrastructurementioning

confidence: 99%

“…New research leads to techniques such as risk-based rehabilitation strategies (see Chapter 8). 33,34 Repair and rehabilitation technologies A number of technologies are available for water and sewer main rehabilitation. These include cleaning and lining, and open-cut and trenchless replacement, with various options, such as insertion of structural liners.…”

Section: Management Issuesmentioning

confidence: 99%

Standards and Metrics

Hill¹

2013

The Complete Project Management Office Handbook

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“…Debris can accumulate in pipe segments having low flow rates but might sometimes be washed away in a storm event. However, such peak flows may also bring in larger obstructions (Hahn et al, 2002). Pohls (2001) conducted research on tree root penetration causing sewer blockage and found other influential factors such as climatic condition, soil type, quantity, type and height of trees and pipe design information such as pipe size, buried depth and pipe joint material.…”

Section: Introductionmentioning

confidence: 99%