Roland Prélaz-Droux

Map of ecological networks for landscape planning

This paper presents a method based on a geographical information system (GIS) to model ecological networks in a fragmented landscape. The ecological networks are generated with the help of a landscape model (which integrate human activities) and with a wildlife dispersal model. The main results are maps which permit the analysis and the understanding of the impact of human activities on wildlife dispersal. Three applications in a study area are presented: ecological networks at the landscape scale, conflicting areas at the farmstead scale and ecological distance between biotopes. These applications show the flexibility of the model and its potential to give information on ecological networks at different planning scales.

A DSS for Sustainable Development

This paper presents an original approach for the planning of infrastructures and resources, developed and experimented through thirteen case studies. The method is based on the linkage of the classic logistical approach with a multicriteria Decision Support System (DSS), making use of three tools: an aggregation outranking algorithm, a Geographic Information System and a graphic consultation interface. The approach is applied to a complex open optimization problem of technologic alternatives integrating natural and energetic resources management for underdeveloped areas in Tunisia. It identifies the main constraints, implementation opportunities and trends for the planning of a sustainable development of these regions.