Assessing environmental risk caused by Zanjan's Paverood dam in its construction stage using a combination of TOPSIS and RAM-D

The aim of this study was to investigate through the environmental risks in which Paverood Dam causes in its constructions stage. After collecting the information related to the environmental conditions of the under study area and the technical conditions of the dam during its construction stage, a list of the possible risk factors were prepared and combined into a questionnaire and presented to a group of professionals including elites and professors with relevant field of study in dam civil engineering. The number of samples was determined on the basis of Cochran’s formula. First, the samples were asked to score the risks present in the area as in Likert type scale form. The given scores were analyzed through PHA and TOPSIS methods to prioritize the identified risks of Paverood. RAM-D method was used to assess the risks accordingly, the effect on Sorkhabad conservatory with score 9, erosion with score of 6 and working in heights and danger of earthquake with score of 3 were identified as the most crucial risks of Paverood Dam. Environmental management plans are essential to decrease environmental risk factors of the dam in its construction phase therefore, the risk decreasing procedures are suggested at the end for the purposes of dealing with the identified risks.