THE USE OF LANDSAT DATA FOR LAND-USE DESCRIPTION OF LAKE HJALMAREN'S WATERSHED 
Landsat multispectral scanner gata has been used to obtain parameters de- 
scribing land use for 4 000 km" large watershed of one of the largest Swedish 
lakes - Hjdlmaren. These parameters will be used in a distributed hydrological 
model for this watershed, with 107 subcatchments, river and lake system as 
computational elements (figures 1 and 2). The data obtained were then compared 
to similar data obtained from digitized maps. 
  
Jim 
     
a, MJÁLMAREN'S WATER SYSTEM BOUNDARY 
#5, SUBORDINATE RIVER SYSTEM'S BOUNDARY 
7. SUSOROINATE WATERSHED'S SOUNDARY 
  
  
  
Fig l. Hjdlmaren's water system. 
  
© 
(ay 
Gh? cs He 
Phen = cm GE SEES 
Cus Cs] 8 
   
  
  
TRANSIT RIVER PART 
© LAKE 
A TRANSIT RIVER  PART/ 
GC WATERSHED OF T ce 
CS INITIAL TRIBUTARY WATERSHED 
  
  
  
  
Fig 2. Hydrographic scheme of the Hjälmaren's 
water svstem. 
410 
A fu 
/5/. 
To fi 
has I 
Over’ 
trans 
over 
and | 
Also 
and 1 
Two | 
folk 
Was ( 
For « 
The | 
in tl 
clas: 
In tl 
cand: 
probe 
choo: 
clas: 
the « 
mati 
the : 
The : 
was ' 
pixe 
clas: 
In tl 
as a 
ber 
In o 
also 
topo 
been 
digi 
subc