Abstract. Desealing soils presents lots of benefits but also some risks. To take them into account in desealing strategies, a methodology was developed to map the desealing potential of soils in urban area. It is based on the use of a multi-criteria analysis (MCA) combined with a geographic information system (GIS). A set of 26 criteria were selected and divided into 4 themes: characteristics of impervious surfaces, soil infiltrability, environmental constraints, advantages/benefits of desealing. The scoring and weighting system was developed during workshops with technical departments from the Nantes metropolitan area (France), which served as a case study. Most sealed soils show a medium potential for desealing. High potential for desealing occur particularly in residential areas. Further tests are in progress to include additional social and legal criteria, as well as managing uncertainties.
Prézeau et al. (Thu,) studied this question.