PT01 Risk Management
Exhibit Hall
8:00 AM - Tuesday
(PT02) DESYRE: a GIS-based decision support system for the integrated management of contaminated sites.
Carlon, C1, Agostini, P2, Critto, A1, 3, Ramieri, E4, Marcomini, A3, 1 CVR, Marghera-Venice, Italy2 IDEAS, University Ca' Foscari, Venice, Italy3 Dept. of Environmental Sciences - University Ca' Foscari, Venice, Italy4 Thetis spa, Venice, Italy
ABSTRACT- A robust and effective risk management requires the integration of several involved aspects, from environmental to socio-economic and technical issues. The consideration of the actual risk, the selection of the best technological options for site remediation, the socio-economic drivers or constraints are significant aspects which need to be taken into account. In order to manage all this different information, it is necessary the development of tools that guarantee transparency and reproducibility in guiding the decision makers to sustainable remediation choices. For this purpose, a GIS-based decision support system, DESYRE (DEcision Support sYstem for REhabilitation of contaminated sites), was developed. DESYRE enables site characterization, socio-economic valuation, risk assessment, technologies selection and scenarios construction for remediation of contaminated sites, through five interconnected modules. In the characterisation module, chemical and hydrogeological data are organized in a relational database and geostatistics tools are applied to provide contaminants maps. The socio-economic module addresses the socio-economical constraints, identifying the best land use, though the application of a Fuzzy Logic analysis. The risk assessment module is divided into two phases. In the pre-remediation phase, an original procedure allows to assess and represent the spatial distribution of risks posed by contaminants in soil and groundwater, providing a risk-based zoning of the site. Then, in the technology assessment module, experts are supported in the selection of suitable technologies and in the creation of different technology sets, taking into account both technical requirements and site-specific features, by means of Multi-Criteria Decision Analysis. In the post-remediation risk assessment, a simulation of applied technologies provides residual risk maps with related uncertainty maps. Finally, in the decision module, alternative remediation scenarios are described by a set of indices, derived from previous analysis; the scenarios can be compared and ranked by the involved stakeholders using Multi-Criteria Decision Analysis methodologies.
Key words: decision support system, integrated risk management