Chandrashekar, Hanumanthaiah 
  
TABLE:8 
Table of Relative Valnerability to Ground Water Pollution: 
< 
> 
>120<or=130 Moderate 
>130<or=140 Moderate 
>140<or=150 
>150<or=160 V 
  
TABLE:9 
Calculation of Spearman's Correlation Co-efficient to measure the degree of relation between Drastic Indices and 
Water Quality Parameters: 
Water i 's Correlation Co-efficient 
1. Total dissolved solids 0.8838 
2. Chlorine 0.8520 
cium 
ectri 
1 
  
CONCLUSSIONS: 
The following conclusions can be drawn 
The DRASTIC methodology adopted for preparing pollution potential map can be used as a screening tool 
ascertain whether the area is more or less vulnerable to ground water pollution. 
DRASTIC methodology may be used for preventive purposes through the prioritization of areas where ground 
water quality protection is critical. The system may also be used to identify areas where special attention or 
protection efforts are warranted. The moderately, highly and very highly vulnerable areas identified in Anekal 
taluk for ground water pollution helps the planners and administrators to undertake some precautionary 
measures, and to conduct detailed study against ground water pollution. 
The pollution potential map prepared using DRASTIC methodology helps in prioritization of areas for 
monitoring purposes. In current study area, denser monitoring system might be installed in moderately, highly 
and very highly vulnerable areas. 
Th efficient allocation of resources for clean up and restoration has occurred is another more possible use of 
‘DRASTIC index map” or “pollution potential map”. 
DRASTIC index map or pollution map prepared manually and computer assisted (G.I.S.) DRSASTIC index 
map yield comparable results. 
The pollution potential map thus prepared for Anekal Taluk helps the planners in broadly screening areas for 
waste disposal sites, industrial sites etc. 
  
  
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International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B7. Amsterdam 2000.