For further control
of acid rain
and SO
2 pollution in China,acid rain control zones
and sulfur dioxide pollutioncontrol zones were designated where acid rain or seriousSO
2 pollution occurs or may occur. In this study, sulfurdeposition in east China was computed through a policy-oriented, two-dimensional Eulerian model for long-range transport
and deposition
of SO
2 and SO
42-. Themodel predictions were in accordance with the wet depositionmonitored. Results show that concentrations
of SO
2 andSO
42- are higher in north China than those in the south,
andhigh deposition
of sulfur occurs in most areas
of NorthChina, in the
lower reaches of the Changjiang (
Yangtze)
Riverand around Chongqing
and Guiyang in southwest China.Total emission
of SO
2 from the modeling region (from 19
![](/images/entities/deg.gif)
Nto 42
![](/images/entities/deg.gif)
N,
and from 104
![](/images/entities/deg.gif)
E to 124
![](/images/entities/deg.gif)
E) was about 20 milliontons in 1995. The model predicts that 48%
of this depositswithin the region as dry deposition, 38% deposits aswet deposition,
and only about 14% was transported out
of the region. The modeling results
of sulfur deposition weredirectly applied in designating acid rain control zones inChina,
and the emission-deposition relationship derived wasalso used to formulate
middle-
and long-range planningprograms for regional acid rain control in China.