Abstract
In recent years, the points to be considered for the maintenance and renovation of irrigation ponds have become diversified and complicated. To cope with such a situation, local government should make a master plan for this purpose. However, there are too many irrigation ponds to make a plan for each pond individually. It seems more effective to sort them into several groups of similar ones to make an improvement plan for each group. From this viewpoint, this study made several groups out of all the irrigation ponds in Sangawa Town, Kagawa Prefecture, and discussed the grouping method to be adopted at the municipality level.
