Decision support through the application of the AHP (Analytic Hierarchy Process) method to the multi-criteria analysis of development strategies from Grand Büech to La Faurie

Abstract

The GEMAPI (Management of Aquatic Environments and Flood Prevention) law, requires managers to consider environmental and flood protection factors in their development projects. The multi-criteria analysis (MCA) method defined by the French government through the PAPI specifications (Flood Prevention Action Programs), is similar to an extended cost-benefit analysis (CBA). In addition to conventional CBA, other environmental, human and socio-cultural criteria must be assessed. However, decision makers are not oriented on the method of aggregation to be used to make the best use of the data in order to select the most relevant project. Recently, an exploratory work carried out on the Greater Buëch watershed (Hautes-Alpes), has made it possible to define a methodological framework making it possible to evaluate projects of development on the basis of monetary criteria, but also on quantitative non-monetary and qualitative ones. In output, the method gives a single synthetic criterion that can support the decision. The method, which is both robust and simple in its principles, remains accessible and makes it possible to respond efficiently to the actual requirements of integrated river management. It guides managers' choices and financial partners' interventions on projects.