1. GIS – BASED DRASTIC MODEL FOR ASSESSING
THE VULNERABILITY OF GROUNDWATER AQUIFERS
TO POLLUTION SOURCES

2. DRASTIC MODEL PARAMETERS
Depth to water
net Recharge
Aquifer media
Soil media
Topography
vadose zone
Conductivity
DRASTIC
Weight
Rate

3. DRASTIC MODEL PARAMETERS & INDEX

4. Depth to water:

5. Depth to water – Model Layer

6. Net Recharge

7. Net Recharge – Model Layer

8. Aquifer media

9. Aquifer media – Model Layer

10. Soil media

11. Soil media – Model Layer

12. Topography

13. Topography – Model Layer

14. Impact of vadose zone

15. Vadose zone – Model Layer

16. Conductivity

17. Hydraulic Conductivity– Model Layer

18. MODEL RESULTS Vulnerability to Contamination in General

19. MODEL RESULTS Vulnerability to fertilizers