Based on the experiences of Lukai elders, when a betel nut tree by the side of the river grows to be about the same width as a waistline, the time of flooding is approaching.
依據魯凱老人家的經驗，當一條河流旁的檳榔樹長大到如腰般粗大的時候，洪水的周期即將來臨。