In order to accommodate the environment of rice paddy agriculture, the Ching dynasty and Japanese occupiers continually built irrigation systems. After industrial waste water of a completely different nature entered them, the "clash of cultures" between agricultural and industrial made itself manifest in the quality of irrigation water.
為配合水稻生產環境，由清朝、日據時代陸續完成的農業灌溉系統，在體質完全不同的工業廢水進入後，農、工業的「文化差異」，終於在灌溉水質上顯現出來。