Ad Hoc Procedure
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Transcript of Ad Hoc Procedure
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Impact assessment tool Ad hoc method
By:
Sangeeta Mukherjee
11EN21F
M.Tech 1st year, 2nd semester
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EIA is defined as
the systematic identification and evaluation of thepotential impacts of proposed projects, plans,programs, or legislative actions relative to thephysical-chemical, biological, cultural and socio-economic components of the total environment.
Changing needs of EIA:
Predictive method
Environmental risk assessment
Economic analysis & expert system
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INTERFACE Examples of analytical tool Examples of planningprocesses
A Traditional EIA National ConservationStrategies
Sectoral Natural ResourceStrategies
B Social Cost Benefit Analysis Traditional Development Plans
C Some Human Ecology &
Anthropology Studies
UNESCO Man and theBiosphere
Programme
D Sustainability Analysis
(modifiedEIA)
National Sustainable
DevelopmentPlans/Strategies
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EIA methodologies:
Ad hoc procedure
Overlay techniquesChecklistMatrices simple, complex
Network
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Ad hoc procedures involve assembling a team ofspecialists to identify impacts in their areas of
expertise , with minimal guidance beyond therequirements of the NEPA (NationalEnvironmental Protection Act)
What is Ad hoc procedure?
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Ad hoc procedures come into playwhen -
Time constraints&Lack of information
Require that the EIA must rely on expert opinion
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Ad hoc methods are not really methods as they do not
structure the problem
It is more amenable to systematic analysis
A good example is a team of experts assembled for a
short time to conduct an EIA
Each experts conclusions are based on a unique
combination of experience, training and intuition
These conclusions are assembled into a report
Sometimes this is the only required and possible
approach
Salient features
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Aim of the ad hocWorking Group -
The aim of the ad hocWorking Group is two-fold.Based on an analysis of the existing requirements it
should be considered whether there is need for:
New regulations; and/or
A guide for the practical application of the existingregulations, in order ensure clear procedures and aharmonized implementation in the region.
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Possible considerations by the adhocWorking Group -
Thead hoc
Working Group might want to Look into the existing regulations applicable to EIAprocedures
Assess examples of practice in implementing the EIA
procedure and see whether any gaps exist
Discuss how to overcome possible gaps
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Possible questions to consider -
When to carry out an EIA
The time schedule
The different stages of an EIA procedure
The final decision
The role of the experts in the process
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Alternatives
Items A B C
Number of reservoirs on river system 4 1 0
Combined surface area, ha 8500 300 -Total reservoir shoreline, km 190 65 -
New irrigation areas, ha 40000 12000 -
Reduced open space because of project and associated
population increases, ha 10000 2000 -
Inundated archaeological sites, nos. 11 3 -Reduced soil erosion, relative magnitude 4x 1x Nil
Enhanced fisheries, relative magnitude 4x 1x Nil
Provision of flood control measures Yes Yes No
New potential malarial areas, relative magnitude 4x 1x Nil
Additional employment potential, number of persons 1000 200 -
Results of using the ad hocmethod to comparealternative reservoir arrangements :
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This method is very easy to use but does have a fewdrawbacks :
It may not encompass all the relevant impacts
The criteria used to evaluate impacts are not comparable;thus the relative weights of various impacts cannot be
compared
It is inherently inefficient as it requires sizeable effort toidentify and assemble an appropriate panel of experts for eachassessment
It provides minimal guidance for impact analysis whilesuggesting broad areas of possible impacts
The process of assessment can never be replicated making it
difficult to review and critique the conclusions in the EIA
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