Adrian Almoradie

Participatory flood vulnerability assessment: a multi-criteria approach

This paper presents a participatory multi-criteria decision-making (MCDM) approach for flood vulnerability assessment while considering the relationships between vulnerability criteria. The applicability of the proposed framework is demonstrated in the municipalities of Lajeado and Estrela, Brazil. The model was co-constructed by 101 experts from governmental organizations, universities, research institutes, NGOs, and private companies. Participatory methods such as the Delphi survey, focus groups, and workshops were applied. A participatory problem structuration, in which the modellers work closely with end users, was used to establish the structure of the vulnerability index. The preferences of each participant regarding the criteria importance were spatially modelled through the analytical hierarchy process (AHP) and analytical network process (ANP) multi-criteria methods. Experts were also involved at the end of the modelling exercise for validation. The final product is a set of individual and group flood vulnerability maps. Both AHP and ANP proved to be effective for flood vulnerability assessment; however, ANP is preferred as it considers the dependences among criteria. The participatory approach enabled experts to learn from each other and acknowledge different perspectives towards social learning. The findings highlight that to enhance the credibility and deployment of model results, multiple viewpoints should be integrated without forcing consensus.

Enhancing Flood Resilience Through Collaborative Modelling and Multi-criteria Decision Analysis (MCDA)

The concept of urban resilience has emerged in the context of flood risk management (FRM) from the need to consider the capability of the society to cope with floods. Whilst there has been much discussion about flood resilience, challenges still remain on how to enhance it. Participation of key stakeholders in the decision-making process has the potential to enrich the resilience of communities as they become more informed, learn from each other and trust is built amongst them. Despite the advantages of participation, community members and decision-makers usually do not play an active role in flood resilience studies. Therefore, inter- and transdisciplinary approaches may help to overcome these limitations whilst promoting social learning towards resilience building. This chapter describes a framework for FRM that can improve urban resilience through participation of local stakeholders with the use of multi-criteria decision analysis (MCDA) tools. First, a systematic review of MCDA studies that tackle flood resilience is presented to provide a better understanding of how participatory MCDA is being conducted. Then, we introduce an innovative FRM participatory approach termed collaborative modelling (CM), which integrates MCDA tools in its process-driven decision-making. Furthermore, the CM-MCDA is supported by user customized Web-based tools to support information dissemination, social learning and negotiation amongst stakeholders. The developed framework was applied in the Cranbrook catchment (London, UK) and in the Alster catchment (Hamburg, Germany). The results show that the CM-MCDA provides an innovative and promising approach to enhance resilience through social learning.