Fujian Province is located in the southeast coastal area of China, where granite is extensively exposed, which causes the fact that radionuclide is generally high in the soil, so that the environmental terrestrial gamma-radiation dose rate is higher too. In recent years, the living environment safety has aroused more and more attention, and the problem whether higher gamma radiation dose rate there is a risk has become much concern from the people. This study chose Luofang of Yong'an and Zhongdi of Wuping which are two key areas to carry out the 1∶50 000 environment terrestrial gamma radiation dose rate measurement, supported by soil samples at the same collection points. Through the study of relationship between specific activity of soil radioactive elements238U, 232Th, 40K and gamma radiation dose rate, a multivariate regression equation was established. The U, Th, K test results of 31 303 surface soil samples obtained from 1∶250 000 multi-purpose regional geochemical survey in Fujian Province were converted into 2 km×2 km grid environmental terrestrial gamma-radiation dose rate in Fujian Province,so that human settlement environment suitability evaluation could be conducted.The authors have reached the conclusion that gamma radiation safety area (with no risk) in Fujian Province possesses about 121 000 km2, accounting for 99.64%, the risk area (probably with some risk) possesses 433 km2,accounting for 0.36%,and controlarea (with risk) only possesses 4 km2, suggesting an excellent natural radioactive environment.
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