1984年调查太湖和安微、江苏运河水系水、沉渣、底质和湖鱼中总β、总α、~(40)K、~(90)Sr、~(137)Cs、~(226)Ra、~(210)Po、~3H、天然铀和天然钍的放射性水平.结果表明,水系不同介质的放射性监测指标水平均低于国家规定的有关限值。水环境内外照射途径所致公众居民个体的年均有效剂量当量是4.56×10~(-6)Sv/a,年均集体有效剂量当量是46.7man-Sv/a. In 1984, the total β, total α, ~ (40) K, ~ (90) Sr, ~ (137) Cs, ~ (226) Ra in Taihu Lake and Anwei, Jiangsu canal water system, sediment, sediment and lake fish were investigated. , ~ (210) Po, ~ 3H, natural uranium and natural thorium.The results show that the radioactivity monitoring indexes of different media in water system are lower than the relevant national regulations. The annual average effective dose equivalent of public resident due to water environment inside and outside exposure is 4.56 × 10 -6 Sv / a, and the annual average collective effective dose equivalent is 46.7 man-Sv / a.