Yen Ch'ing-lien, a professor of civil engineering at National Taiwan University, explains that a 200-year levee is one estimated, based on records of past flooding, to be higher than all floods except those likely to occur just once every 200 years.
台大土本系教授顏清連解釋：「所謂做二百年的堤防，是按過去的水文資料推算，堤防高於二百年中可能發生的最大一次洪水的水位。