Risk Management and Control of Dams Based on Integrating TOPSIS and RAM-D Techniques (Case Study: Paveh Rood Dam, Iran)

Abstract

The purpose of this study was to manage the risks of Paveh Rood Dam at constructional phase by integrating TOPSIS & RAM-D techniques. After investigating the environmental conditions of the study area and the technical specifications of the dam, the risks of the dam construction were listed in a questionnaire. After analyzing the given scores by Preliminary Hazard Analysis (PHA), Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) was used to prioritize the identified risks of the Paveh Rood Dam. According to the results, among 43 risk factors, erosion, due to the severe erosion in the study basin, and its intensification, due to the loss of top soil and damage to vegetation cover, were two factors given the first and highest priority. Excavation and embankment, due to large-scale dam construction operations to build the dam reservoir, and building roads, tunnels, and camps, were placed second. The results of risk assessment showed that damage to Sorkhabad Protected Area (with a score of 9), due to its proximity to the dam site and placement of a part of irrigation and drainage network within which, intensification of erosion (with a score of 6), due to high erodibility of the study area, work at height in terms of the importance of safety issues and earthquake (with a score of 3), given that the area around the dam site has seismic dynamics, were recognized the most important risks of Paveh Rood Dam at constructional phase.