L Iliadis - Department of Forestry, Management of the Environment & Natural Resources, Democritus University of Thrace, ۱۹۳ Padazidou st., ۶۸۲۰۰, N. Orestiada, Greece
S Spartalis - Department of Production Engineering & Management, School of Engineering, Democritus University of Thrace, University Library Building, ۶۷۱۰۰Xanthi, Greece

In this paper we propose and construct Fuzzy Algebraic Additive Model, for the estimation of risk in various fields of human activities or nature’s behavior. Though the proposed model is useful in a wide range of scientific fields, it was designed for to torrential risk evaluation in the area of river Evros. Clearly the model’s performance improves when the number of parameters and the actual data increases. A Fuzzy Decision Support System was designed and implemented to incorporate the model’s risk estimation capacity and the risk estimation output of the system was compared with the output of other existing methods with very interesting results.

Fuzzy additive models, fuzzy algebra, Decision Support System, Torrential risk