Hierarchical Structure of the Barriers to Integrated Flood Risk Management in Metro Manila, Philippines by Interpretive Structural Modelling Approach

Abstract

 The adaptation of integrated flood risk management (IFRM) plan in Metro Manila, Philippines is a challenging task due to heavy reliance on traditional structural measures in the past. Moreover, there are critical issues or “barriers” that hamper the adaptation of IFRM. These barriers are interrelated with each other, hence, they should be translated in a systematic model showing the interrelationships as well as the hierarchy. This study presents for the first time the application of the Interpretive Structural Modelling (ISM) method to barrier analysis related to IFRM. This method is a systematic approach that analyses complex and interrelated issues that is structured in a comprehensive model. The results show that, among the 12 barriers identified, the lack of sole organizing body is the most influential barrier while the poor solid waste management, sparse data and limited access, and deterioration of flood control structure barriers are the least influential barrier. The ISM model clearly showed that the barriers on the governance aspect are the most influential barriers that may dictate the movement of all other barriers. The ISM model produced in this study shows the interconnections of each barrier that can aid the decision makers and practitioners in Metro Manila, Philippines.