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

Abstract

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.

Smart Cities Maturity Model—A Multicriteria Approach

“…The multicriteria method Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) used in this step was proposed by Tzeng and Huang [125] and has been used in several works; it is one of the most widely used multicriteria methods [126], and it stands out for looking for the alternative that is furthest from the negative ideal solution and closer to the positive ideal solution. In this study, the TOPSIS method was structured as a mathematical instrument for measuring the MMSC smartness in the health area [127,128], environment and sustainability [129][130][131][132][133][134][135][136][137][138], technology [139][140][141][142][143][144], and urban spaces and developments [145][146][147][148][149], among many others in the engineering fields [150][151][152][153][154][155][156][157][158][159][160][161][162].…”

Damage Types and Deterioration Characteristics of Check Dams Built on Mountain Streams in Southeast Korea

“…This needs to take reliable inspection data on the current conditions of single or multiple cases of check dams. In previous studies, the structural vulnerability and functionality of check dams have been evaluated using methods that examine physical condition via visual inspections and non-destructive testing (Mizuyama, 1979;Dell'Agnese et al, 2013;Lee et al, 2021;Cortes Arevalo et al, 2016;Lee et al, 2018;Mazzorana et al, 2018), as well as methods that examine the structure's effectiveness, including bed stabilization, slope reduction, and sediment retention (Makita et al, 1987;Lenzi et al, 2003;Comiti et al, 2010;Chahrour et al, 2021). However, the damages and deterioration of existing check dams are generally evaluated by qualitative methods (condition rating) in maintenance practice.…”

“…Therefore, it is important in the management of sediment disaster risk at forest watersheds to assess the durability, performance, and sustainability of check dams constructed on mountain streams to inform management and maintenance decision-making and policy. In particular, the assessment of check dam deterioration involves assessing the degree of change in the condition inside and outside the check dam by investigating and analyzing structural deterioration caused by localized environment factors and the properties of construction materials, or damages to the structure caused by debris flow and flooding events that exceeds the structure's permissible limits, as applied to studies on maintenance practices (Dell'Agnese et al, 2013;Cortes Arevalo et al, 2016;Lee et al, 2018;Mazzorana et al, 2018).…”

Study on the Applicability of the Exterior Condition Assessment to Evaluate The Physical Vulnerability of Check Dams

“…그리고 이는 하나의 구조물 또는 전체 시설군의 현재 상태에 관한 현장 정보에 기초한다. 지금까지 사방댐의 성능 및 안정성 평가에 관한 연구는 외관조사 또는 비파괴 시험을 이용하여 구조물 의 물리적 취약요인을 조사 및 평가하였으며 (Mizuyama, 1979;Kasahara et al, 2010;Ogasawara and Kambara, 2015;Dell'Agnese et al, 2013;Lee et al, 2012;Park et al, 2013;Lee et al, 2014;Lee, 2015;Cortes Arevalo et al, 2016;Lee, 2017;Lee et al, 2018;Mazzorana et al, 2018), 그리고 사방댐의 산각 고정 효과와 계상경사 완화, 침사지의 저사 능력 등 구조물의 성능과 기능적 요인을 조사 및 실험을 통해 분석하였다 (Makita et al, 1987;Lenzi et al, 2003;Comiti et al, 2010;Seo et al, 2014;Chahrour et al, 2021;Seo et al, 2016).…”

“…사방댐 외관상태평가는 사용환경적 요인과 건설재료의 특성에 의한 구조물 열화 또는 허용한계를 초과하는 토석류 및 홍수 이벤트에 의한 구조물 피해를 조사⋅분석하여 사방 댐 외관의 상태변화 정도를 평가하는 것으로 주로 유지관리 실무에 관한 연구에 적용되었다 (Ogasawara and Kambara, 2015;Dell'Agnese et al, 2013;Lee et al, 2014;Lee, 2015;Cortes Arevalo et al, 2016, Lee, 2017Lee et al, 2018;Mazzorana et al, 2018) (Andersen and Torrey, 1995;Park et al, 2016;Jeong et al, 2018). 특히, 평가대상의 구조적⋅기능적 상태를 계산적 접근방법을 통해 수치화(상태지수)할 수 있어 댐, 교량, 도로 등 다양한 시설물의 유지관리 우선순위 결정에 사용되고 있다 (MLIT, 2014;FHWA, 2016;MOLIT, 2019).…”