r the 
iques 
ment 
ained 
tered 
, and 
's and 
  
  
  
valuable experiences for the further re- 
searches. 
3) With regard to this study , the situation 
of the land use changes in the research 
area, from 1988 to 1995, was summerized 
as follows: 
- The area of water body expanded 
strongly from 1988 to 1992, increased as 
much as 4.18 times, but, from 1992 to 1995 
appeared declining tendency, decreased by 
1/2. 
- Farming lands area, from 1988 to 1992, 
decreased on a large scale, i.e. decreased 
by 32.3%, mainly converted into built up 
area , while there was a slight expansion 
from 1992 to 1995, increased by 6%. 
- There were no significant changes in 
green lands area from 1988 to 1992, 
decreased by 1.6%, yet, from 1992 to 1995, 
it increased by 33.6%, mainly the built-up 
area was converted into green lands, i.e. the 
afforestation degree of this city have been 
increasing constantly. 
— The built-up area , from 1988 to 1992, 
showed a increasing tendency on a large 
scale, increased by 17.1%. But, from 1992 
to 1995, manifested decreasing tendency, 
decreased by 8%. This phenomenon is 
attributed to the slow encrease of built-up 
area than that of the afforestation rate, so it 
is only considered as a temporal phenome- 
non, doesn't represent a tendency. 
Other land use types, except the four land 
use types described above, have being 
converted into built-up area, green lands 
and farming lands, and its proportion in the 
whole research area has been descending. 
  
Area 
  
  
from left to right 1988, 1992, 1995 
| water 
| |B farming land 
O green land 
O built-up area 
  
B others 
  
  
  
Fig 2. histogram for each land use type area in each period 
Intemational Archives of Photogrammetry and Remote Sensing. Vol. XXXII, Part 7, Budapest, 1998 283