1998年五月發現在南台灣國道322.5K高速公路有漏油發生。從發現便開始進行浮油回收作業一直持續到2000年七月。場址每年雨季來臨後皆使浮油回收速率大於在乾季時之回收速率，從現場數據顯示浮油回收率與降雨率息息相關。在現地觀察受降雨作用影響的浮油回收曲線近似於多重S曲線，此現象與石油工程中水沖排置換理論相似。從現地數據以及模式預測值都指出水沖排確實影響初期或者是在穿越點之後的浮油回收。

　Oil leakage occurred near the national highway in Southern Taiwan and was discovered in March 1998. Since the discovery, free product recovery started and continued until June 2000. Field data showed that the oil recovery rate correlated with precipitation. Every year, the oil recovery rate during rainy season was higher than that of the previous dry season. The effect of precipitation on the cumulative oil recovery was manifested by a multiple-S-shaped curve observed at the site, which could be calculated and interpreted by the immiscible displacement theory. Both the field data and the model prediction showed that the oil recovery of a waterflood was extremely effective in the early stage and dropped sharply after water breakthrough.

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