为了解决广州自来水水源污染 ,目前广东管径最大 (口径 2 .4ｍ)、长度最长 (580ｍ)的一条大型过江输水钢管 ,于 1999年 12月 2 8日在广州市增城新塘大墩乡内的仙村涌沉放。广州的新塘水厂和西洲水厂合计供水达 12 0× 10 4 ｍ3/ｄ ,占广州市总供水量 1/ 3,近年来因老取水点受到 In order to solve the water pollution from tap water in Guangzhou, a large-scale river-conveying water pipe with the largest pipe diameter (2.4 m in diameter) and the longest length (580 m) in Guangdong was inundated in Xintang, Xincheng, Guangzhou, on December 28, 1999. The village of Xiancun sinks. The total water supply of the Xintang and Xizhou water plants in Guangzhou reached 120×104 m3/d, accounting for 1/3 of the total water supply in Guangzhou. In recent years, the old water intake has been affected.