【摘要】 <正> 合肥地区属于波状平原裂隙孔隙淡水贫水亚区,无良好的含水层。但在这类地区中的现代河谷全新统含水情况较好,在流经市区的南淝河两岸向外延伸约1公里的河谷范围内,就有与河水呈相互补给关系的浅层地下水。合肥市的旧城区(现淮河路、安庆路一带)就建在这类地质结构的土地上。在这里打井,穿过5～10米的覆盖层,就出现含水层。因此,这一带居民至今还有使用和饮用井水的情况。近二十年来,阴离子合成洗涤剂直链更多还原

【Abstract】 The samples of water were examined for the linear alkyl sulfa- nate (LAS) & bacteria from 35 wells during summer in Hefei 1984.LAS was found in 21 water samples & the concentration of 16 samples was≥0.03mg/l, The total number of the bacteria ranged from 20 to 42,000 per ml.The coeffecient of corelation for LAS & bacteria was 0.81(P<0.01).更多还原