2017 年 23 巻 p. 311-316
It is important to keep river administration facilities in good condition in terms of their disaster- protection functions, using planned periodic inspections and appropriate data storage. This paper presents a method for analyzing the maintenance of river administration facilities using inspection data to maintain them in good condition. Many conditions affect river administration facilities in mountainous areas. In this study, factors that affect the degradation of the facilities were analyzed using multivariate analysis, specifically, mathematical quantification class Ⅱ. Our results showed that the degradation of river administration facilities in mountainous areas was affected by the natural environmental conditions, such as geological features, water flow, and sunlight. The methods of degradation prediction are also described and discussed in terms of planned maintenance.