Report cards for aging and maintenance assessment of water-supply infrastructure

Abstract

During past periods of rapid economic growth, infrastructure development in Japan was intense. This infrastructure now requires both renovation and replacement. Appropriate management of infrastructure is critical as the population falls, budgets become reduced, and staff numbers dwindle. The Japan Society of Civil Engineers evaluates infrastructure soundness and publishes the results to promote understanding of the current situation and to emphasize the importance of maintenance. We devised indices for evaluating deterioration of drinking-water distribution pipelines and maintenance management systems for the pipelines. The indices are the percentage of old pipelines, the percentage of ineffective water, change in the number of technical staff per unit length of pipe, and the repair rate of water leaks. Using these indices, the evaluation result for Japan overall was a C (Caution) in terms of deterioration and Downward in terms of maintenance management.

Pipeline failure evaluation and prediction using failure probability and neural network based on measured data

“…In reference [ 20 ], assessment of aging and maintenance of water-supply infrastructure has been done. Reference [ 21 ] has also evaluated the health of urban water-supply using the Bayesian method and triangular fuzzy number optimization.…”

Progress in Drainage Pipeline Condition Assessment and Deterioration Prediction Models

“…Sewage overflow and groundwater leakage have seriously affected urban aesthetics and environmental hygiene [1,2], and the accompanying fetid water bodies [3] and heavymetal pollution [4] have gradually become focal issues that endanger human health and hinder urban development. At the same time, the operation and maintenance of drainage pipes remain a difficult problem to overcome for the research and engineering community because of their deep burial, complex branching structure, and the large variation in the shape of pipe openings [5,6].…”