oldaaa.gamta.ltaaaTipkCapasity_ECDGLT.7.05-2nd

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Evaluation and optimisation of alternatives
                   Two cases



                   -Criteria of judgement
                   -Matrix evaluation, including costs
                   -Mitigating measures




Consultant: CMDC Joint Venture
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Case 1: capacity improvement of highway A12

Aspects assessed:                          Alternatives assessed:
-Traffic and transport                     -Reference situation 2x2 lanes
-Infrastructure                            -Utilisation of current deck 2x3
-Human env. (noise, air, safety)           -Minimal enlargement 2x4
-Natural env. (flora, fauna, landscape)    -Maximal enlargement 2x4
-Spatial planning (agriculture, housing)   -Safe design 4x2
-Economy                                   -Environmentally optimal alternative
-Costs




Consultant: CMDC Joint Venture
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Case 2: location and technology for a new water
 production plant

     Aspects assessed:           Alternatives assessed:
     -Water and soil             -Reference situation (existing plant)
     -Agriculture                -Trench / groundwater
     -Nature                     -Stream channel / groundwater
     -Landscape                  -River bank / bank-groundwater
     -Energy, waste, materials   -Infiltration area / surface water infiltration
     -Management (incl. costs)   -Environmentally optimal alternative




Consultant: CMDC Joint Venture
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Components of the EIA, both cases

    Contents of the report:
    -Problem definition and objective
    -Present and known future situation in study area
    -Alternatives
    -Most environmentally friendly alternative
    -Criteria of judgement of the alternatives
    -Impacts
    -Comparison of the alternatives
    -Compensation and mitigation

    Difference: nominal (water) or ordinal (highway) alternatives
Consultant: CMDC Joint Venture
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Criteria of judgement of the alternatives
    Based on insight through public and expert consultations

    Defined in scoping

    Includes both topic (aspect) and methodology of assessment

    Described in the EIA report, before description of impacts

    Both qualitative and quantitative or standardised evaluation




Consultant: CMDC Joint Venture
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Comparison of alternatives: MCA scores
                                             Scores
Theme    Aspect       Weight   Criteria      Zero     Alt. Wet   Alt. Combi Alt. Lake   Alt. Creek M.E.F.A.
Nature   Flora    and 3        increase/de
         fauna                 crease
                               current and
                               potential
                               values            0         5         10         10          10         10
                      2        change in
                               w ater
                               quality           0         5         5          10          5          10
         Ecological 1          disturbance
         infrastructu          through
         re                    recreation        0        -5        -10         -10         -5         -10
                      2        functioning
                               as part of
                               the Green-
                               blue zone         0         0         0           5          5           0
                               total             0       1,25       1,25       3,75        3,75        2,5

Consultant: CMDC Joint Venture
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Comparison of alternatives: MCA weights
 Nature   Flora    and 3         decrease/inc
          fauna                  rease current
                                 and potential
                                 values           0   15    30     30     30    30
                       2         change in
                                 water quality    0   10    10     20     10    20
          Ecological 1           disturbance
          infrastructure         through
                                 recreation       0   -5    -10    -10    -5    -10
                       2         functioning
                                 as part of the
                                 Green-blue
                                 zone             0   0      0     10     10    0
                                 total            0   2,5   3,75   6,25   5,6   5,0



Consultant: CMDC Joint Venture
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Comparison of alternatives: ranking
  Highway (no weights agreed)
  •Based on scores natural environment: 1 – 3 – 4 – 5 – 6 - 2
  •Based on scores human environment: 1 – 3 – 4 – 5 – 6 - 1
  •Based on scores traffic: 6 – 5 – 3 – 2 – 1 - 4
  •Based on scores economy: 6 – 4 – 3 – 2 – 1 - 4


  Water production plant (weights agreed)
  •Based on scores: 6 – 4 – 4 – 1 – 1 - 3
  •Based on weights: 6 - 5 – 4 – 1 – 2 - 3


  Choice of weights and/or point of view = political = subjective
  Conclusion for given choice = evidence based = objective



Consultant: CMDC Joint Venture
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Mitigating measures - types
      3 types of measures:

      -those who are already foreseen in every alternative

      -those who could be elaborated in the next project phase if
      desired

      -those who are part of the Env. Opt. Alternative but who could
      be applied to every other alternative if desired



Consultant: CMDC Joint Venture
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 Mitigating measures – some examples
Measure                                           positive for…
•Optimisation stream of raw materials             sustainability
•Maintenance-free design                          sustainability
•Dam to protect areas prone to dehydration        water system
•Plant construction with vegetation               visual nuisance
•No construction during brooding season           fauna
•Additional noise measures                        fauna, noise nuisance
•Move monumental trees elsewhere                  flora, landscape
•Remove/prevent sight obstruction cyclists        social safety
•Lights near cyclist tunnels and paths            social safety
•Prevent pollution rather than clean afterwards   water system, costs



 Consultant: CMDC Joint Venture