AST2.0 Ranking adaptation measures based on effectiveness
The AST2.0 scores the effectiveness of measures based on the local conditions. The score is than used to rank the measures. The method is a light version of the method that is described in (Voskamp and van de Ven, 2015).
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Both steps use scores that have been obtained by expert judgement in which the effectiveness has been estimated relative to the effectiveness of the total set of measures. The table of effectiveness scores can be found here (LINK effectiveness score).
Technical feasibility assessment
The first part of the ranking method is the ‘technical feasibility assessment’, meant to generate a ranking of adaptation measures based on their technical feasibility at a project location. This assessment is a rapid and data-extensive step that utilizes basic field data on:
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The scores for three criteria are summed to determine technical feasibility score.
Site suitability assessment
After the technical feasibility assessment, the measures are scored on their site suitability. For this assessment three site suitability criteria are used:
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The total suitability score is 100% of the first part of the suitability score in case that suitability score based on the sub-surface depth and roofs score is 1 and it is 40% in case that suitability score based on the sub-surface depth and roofs score is 0.
Combined assessment
The final step of the selection assistant is the combinability assessment. The technical feasibility is adjusted by multiplication with the system capacity score. The total scores of the blue-green measures on adjusted technical feasibility and site suitability are than summed to evaluate their complementarity to the current system capacities.
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