Summarization of Environmental Impact Assessment Methodology by Dr. I.M. Mishra Professor, Dept. of Chemical Engineering Dean, Saharanpur Campus Indian Institute of Technology, Roorkee

1. Summarization of Environmental Impact
Assessment Methodology
By
Dr. I.M. Mishra
Professor, Dept. of Chemical Engineering
Dean, Saharanpur Campus
Indian Institute of Technology, Roorkee

2. Summarization of Environmental Impact
Assessment
Methodologies
• adhoc methods.
• map over lays.
• impact checklists
• impact matrices and
• cause-condition-effect networks.
Network Method

3. Conclusion
 identification of impacts
 measurement of impacts
 interpretation of impacts
 communication of results Further, all the methods differ
from one
 another in one or more

8. Adhoc Approach to Environmental Impact Versus Environmental Area

9. Ranking Example for Five Highway Project Alternatives and Eight Impact Areas

10. Rating Example for Five Highway Projects
Incremental Ranking Example for the Five Highway Project Alternatives
and Seven Impact Areas

12. Summarization of Environmental Impact
Overview of Impact Assessment Methodologies
Illustrative Ad Hoc Approach to Environmental Impact Versus Environmental Area

13. Illustrative Matrix Approach to Comparing Environmental Impact of
Actions on Existing Characteristics and Conditions of the Environment

14. Impact tree for a hypothetical bank stabilization project.

15. Illustrative Example of Checklist Approach to Neighborhood Development
Project

16. Ranking Example for Five Highway Project Alternatives and Seven Impact Areas

17. Rating Example for Five Highway Project Alternatives and Seven Impact Areas

18. Incremental Ranking Example for Five Highway Project Alternatives
and Seven Impact Areas

19. Rating Example Based on Incremental Rankings for Five Highway
Project Alternatives and Seven Impact Areas

20. Illustrative Example of Weighted Impact on Actions on Existing
Characteristics and Conditions of the Environment

21. Candidate value Curves for Farmland impact

22. Illustrative Example of the Development of Impact Area Importance Weightings

23. Example of a value function for dissolved oxygen as a measure of Water quality.

24. Planning Factors for land Use Configurations

25. Additional Planning Factors

27. Determination of Impact Values

29. Summary of Configuration Environmental Impacts

31. Network Method
Conceptual framework of impact networks.

32. Example of impact tree for new freeway const1l1ction in established
downtown business district.

33. (a) Illustrative impact tree
(b) corresponding branches

34. Illustrative Impact Frequency, Magnitude, and Importance Values for New
Freeway Construction in a Downtown Area