Approach to improving the quality of data used to analyse dams – illustrations by two methods

Curt, Corinne; Gervais, Richard

doi:10.1080/19648189.2013.850188

Cited by 4 publications

(5 citation statements)

References 19 publications

(20 reference statements)

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“…Secondly, these data have potentially different characteristics and formats, are dynamic and contain imperfections (imprecision, uncertainties, incompleteness and conflicts between data) (Curt & Gervais, 2014). In order to exploit them, collection methods and tools, processing and possibly the combination of heterogeneous, dynamic and imperfect data must therefore be proposed.…”

Section: Directions Of Research Concerning Datamentioning

confidence: 99%

Water infrastructure asset management: state of the art and emerging research themes

Gat

Curt

Werey

et al. 2023

Structure and Infrastructure Engineering

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The long-term maintenance of infrastructure requires asset management. This latter is defined as a series of actions aimed at the long-term maintenance of the capacity of an infrastructure to provide an efficient service for users, at costs and with impacts that are tolerable for society and the environment. The actions implemented concern notably the inventory of infrastructures, their monitoring, inspection and maintenance, the analysis of their state and performance, their reinforcement, renovation, and the definition of long-term technical-financial policies. This paper is structured around four themes based on the authors' experience faced with an analysis of the perspectives set out in recent articles. For each theme, a state of the art largely based on the literature in the field, as well as emerging and nevertheless pressing needs in terms of knowledge production and tools to support reflection and decision-making are presented: temporal and spatial dimensions of Water Infrastructure Asset Management and their consistency; multi-infrastructure management seen from the perspective of physical interdependences and decision-aids; governance, organisations and territories; digital representation of the socio-technical infrastructural system. The analysis is carried out following several disciplines from the engineering and, the human and social sciences.Infrastructure linked to water are studied.

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Section: Directions Of Research Concerning Datamentioning

confidence: 99%

Water infrastructure asset management: state of the art and emerging research themes

Gat

Curt

Werey

et al. 2023

Structure and Infrastructure Engineering

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“…These data usually present imperfect features: imprecision, uncertainty and incompleteness. We combined the knowledge-based method and possibility theory for assessing dam performance (Curt, 2013;Curt and Gervais, 2014). The system developed is capable of modeling, aggregating heterogeneous imperfect information, and representing expert knowledge.…”

Section: The Issue Of Dam Performance Assessmentmentioning

confidence: 99%

“…Figure 1 Experts use performance assessment to monitor dam safety and recommend corrective actions if necessary. Corrective actions are of various types and concern both the technical components of the dam and the measurement system (Curt and Talon, 2013;Curt and Gervais, 2014): emergency action (partial or complete emptying of the reservoir), major reconstruction, rehabilitation or safety projects, maintenance actions (scraping of the dowstream slope, drain outlet cleaning, renewal of monitoring equipment and so forth), upgrading dam performance monitoring (increasing measurement frequency, performing laboratory tests and so forth). The objective is twofold: to improve the measurement system (for instance, the scraping of the downstream shoulder allows better visual observations, the renewal of an monitoring device allows obtaining reliable data, etc.)…”

Section: Name Leakage On the Downstream Embankment Definitionmentioning

confidence: 99%

“…Zeleznikov and Nolan (2001) claimed that soft computing techniques such as fuzzy reasoning can be integrated with symbolic techniques to provide efficient decisionmaking in knowledge-based systems. We have developed such a method for the assessment of dam performance (Curt et al 2011, Curt andTalon 2013;Curt and Gervais, 2014). This article is dedicated to the defuzzification step.…”

Section: Introductionmentioning

confidence: 99%

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Selection of appropriate defuzzification methods: Application to the assessment of dam performance

Talon¹,

Curt²

2017

Expert Systems with Applications

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The performance assessment of dams is of major importance for optimizing maintenance management. A methodology is provided here to assess the risk of dam failure using data collected during in-situ inspections and from the design and follow-up files. This assessment takes into account uncertainty associated with the data and the assessment process. The result of this assessment is introduced in a fuzzy frame. This paper presents the approach taken to choose defuzzification methods that allow extracting the information necessary from this possibility distribution so that dam experts can both rank dam maintenance actions and communicate the results of this assessment. This paper first presents the process used to assess dam performance after which it presents the defuzzification methods available. A sensitivity analysis is then performed to select the methods most relevant for our case study. The last part presents the development of a tool useful for the application of defuzzification methods to our problematic and describes a real case study in which the selected defuzzification methods are used. HIGHLIGHTS We propose an approach for selecting appropriate defuzzification methods that fulfills the requirements of a group of experts. We propose a sensitivity analysis of defuzzification methods. We apply this approach to the assessment of dam performance. Methods were chosen in relation to the objectives (decision-support and communication) defined by a group of dam experts. The approach is applied to a real case.

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“…Dabous & Alkass, 2010;Rashidi & Lemass, 2011), dams (e.g. Curt & Gervais, 2014) and sewage systems (e.g. Tagherouit, Bennis, & Bengassem, 2011).…”

Section: Overview Of Criteria For Inspection and Maintenance Planningmentioning

confidence: 99%

Decision support method to systematically evaluate first-level inspections of the functional status of check dams

Arevalo

Sterlacchini

Bogaard

et al. 2016

Structure and Infrastructure Engineering

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First-level inspections could be provided by skilled volunteers or technicians to pre-screen the functional status of check dams. This paper discusses the design and testing of a support method in collaboration with the responsible technicians in evaluating inspection reports. Reports are based on linguistic rating scales that are systematically aggregated into indices by means of a multi-criteria TOPSIS method with fuzzy terms. The aggregation procedure is carried out for three parameters representing the structure's status while highlighting any lack of completeness of inspection reports. The method was evaluated using inspection reports collected during a workshop in the Fella basin in the Italian Alps. The method allows the responsible technicians to set rules to categorise the aggregated indices in one of three levels, each corresponding with a course of action. Rules were useful to categorise the aggregated indices according to the structure's status. Disagreements on rating defects suggest that a weighted aggregation procedure to calculate the indices might lead to overestimating or underestimating defects. Complementary data from historical inspections or remote sensing are required to initiate specific actions. The method can be applied to pre-screen different types of hydraulic structures after adaptation to the local conditions and functional requirements.

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Approach to improving the quality of data used to analyse dams – illustrations by two methods

Cited by 4 publications

References 19 publications

Water infrastructure asset management: state of the art and emerging research themes

Water infrastructure asset management: state of the art and emerging research themes

Selection of appropriate defuzzification methods: Application to the assessment of dam performance

Decision support method to systematically evaluate first-level inspections of the functional status of check dams

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