Influence charts for assessing the dispersion potential of fugitive dust of the riverbed of Da-An River under various meteorological conditions was established by a series of FDM
(Fugitive Dust Model) simulations. The simulated distribution of annually average PM10 concentration at wintertime shows that the bare lands of the riverbed possess a larger emission quantity of fugitive dust due to the higher wind velocity of the northern monsoon in the year. In addition, the FDM simulations also indicate that the Ding-An village, the Da-Jia town, the neighborhoods of High Speed
Rail Bridge, and the Yi-Li Bridge at the southern bank of the downstream reach are the main regions with higher fugitive dust concentration and which coincided with those observed in the past years. The highest daily average PM10 concentration for the four regions at the southern bank is mainly contributed by different reaches with different percentage as follows: 87.12% from Reach-1 for Ding-An
village, 38.72% from Reach-4 for Da-Jia town, 41.05% from Reach-6 for neighborhoods of High Speed Rail Bridge, 54.27% from Reach-9 for Yi-Li Bridge. Conclusively, the Reach-1, Reach-4,Reach-6 and Reach-9 are considered as the most critical reaches with high potential of fugitive dust to
the nearby communities at the downstream of Da-An River.
Key Words : Dispersion of fugitive dust, FDM (fugitive dust model), emission rate of fugitive dust,PM10 concentration.