ompound 
ntial soil 
priority; 
ctual soil 
ed based 
s of sub 
oritized 
Zones 
jon) 
Ye 
antum of 
of very 
equency, 
umbered 
; priority 
p slopes, 
ratio and 
:lassified 
| consists 
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ongation 
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e slopes, 
ure ratio, 
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ry slight 
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ope, soil 
) find out 
servation 
range of 
IAPRS & SIS, Vol.34, Part 7, “Resource and Environmental Monitoring”, Hyderabad, India, 2002 
cumulative values, nine mapping units were identified (Fig.3) 
to suggest various soil conservation measures (Singh, et.al., 
1981). The area analysis shows that the mapping units of C9, 
C8, C7, C6 and C5 occupy 0.16, 6.78, 14.47, 15.38 and 8.91 
per cent of the total area respectively (Table.2). These mapping 
units are in association with very steep to gentle slopes, 
dissected ridges, plateau spurs, escarpments, subdued plateau 
and pediments with very shallow to moderately shallow soils. 
The various mechanical soil conservation measures were 
suggested for these units to arrest the accelerated soil erosion 
(Table.2). The mapping units of C4, C3, C2 and C1 occupy the 
15.22, 18.55, 17.17 and 3.36 per cent of the total area. These 
mapping units are mainly characterized with gentle to nearly 
level plains, piedmont plains, pediments, narrow valleys and 
main valley floors with moderately shallow to very deep soils: 
Depending on the existing field conditions, various biological 
  
  
r 
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= 
ao 
  
Drainage 
e Sub-Basin 
ater bodies — ——— Metalled Road 
Builtup area National Highway 
—— — Railway line 
  
BD 
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T M 0C) BOO ^ CO (Q0 
  
2 
  
3 
, measures were suggested for the mapping units of C4, C3, C2 
and Cl. The identified mapping units and suggested soil 
conservation measures were validated in the field and found 
good correlation between the ground conditions and the 
suggested conservation measures. 
CONCLUSIONS 
The study reveals that quantitative evaluation of various 
parameters of river basin i.e., morphometry, slope, landforms, 
soils and land use/land cover characteristics are pre-requisite 
and paramount in soil loss assessment and prioritization of sub 
basins. The study shows that GIS based integrated analysis of 
USLE parameters will be of immense help in quantitative 
estimation of potential and actual soil loss at sub basin level. 
The analysis of morphometric, potential and actual soil erosion 
Vena Basin 
Soil Conservation Units 
        
  
Fig.3. Delineated Soil conservation units 
657