Because Keelung has a rainy climate, water often seeped through the ground, emerging in the mines as copper mineral water. The Japanese channeled the water into deep pits or steel barrels to get it out of the mines, and the rust-colored water--contaminated with iron waste--was channeled into Lientung Bay.
由於基隆多雨，雨水滲入礦坑的碎裂岩縫中，流出天然銅礦水，日本人便開始將礦水導入沈澱池及鐵槽中以析出銅礦，紅鏽色的含鐵廢水則導入濂洞灣。