Environmental impact assessment of structural flood mitigation measures by a rapid impact assessment matrix (RIAM) technique: A case study in Metro Manila, Philippines

Department of Civil and Environmental Engineering, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji, Tokyo, 192-0397, Japan. Electronic address: .
Science of The Total Environment (Impact Factor: 4.1). 04/2013; 456-457C:137-147. DOI: 10.1016/j.scitotenv.2013.03.063
Source: PubMed


In recent decades, the practice of environmental impact assessment (EIA) in the planning processes of infrastructure projects has created significant awareness on the benefits of environmentally sound and sustainable urban development around the world. In the highly urbanized megacities in the Philippines, like Metro Manila, high priority is given by the national government to structural flood mitigation measures (SFMM) due to the persistently high frequency of flood-related disasters, which are exacerbated by the on-going effects of climate change. EIA thus, should be carefully and effectively executed to maximize the potential benefits of the SFMM. The common practice of EIA in the Philippines is generally qualitative and lacks clear methodology in evaluating multi-criteria systems. Thus, this study proposes the use of the rapid impact assessment matrix (RIAM) technique to provide a method that would systematically and quantitatively evaluate the socio-economic and environmental impacts of planned SFMM in Metro Manila. The RIAM technique was slightly modified to fit the requirements of this study. The scale of impact was determined for each perceived impact, and based on the results, the planned SFMM for Metro Manila will likely bring significant benefits; however, significant negative impacts may also likely occur. The proposed modifications were found to be highly compatible with RIAM, and the results of the RIAM analysis provided a clear view of the impacts associated with the implementation of SFMM projects. This may prove to be valuable in the practice of EIA in the Philippines.

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    • "n various regional environmental assessments for river basins, coastal zones and urban planning including the Manila Third Sewerage Project. SEA prospects seem to be in the development of a SEA framework within the Environmental Assessment Act that would require SEA for PPPs involving multicomponent , multi-sector projects and activities (Gilbuena Jr. et al., 2013; Mercado, 2007). In terms of cultural dimensions, Philippines has a high PDI with a score of 94 which indicates a hierarchical society where centralization is prevalent (Hofstede , 2014). Finally, SEA developments in the Philippines indicate the absence of SEA legislation, SEA application, public participation provision as well as publi"
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    Full-text · Article · Aug 2014 · Environmental Science & Policy
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    • "Each environmental category is divided in terms of project phases (pre-construction, construction and operation), and then further divided into specific environmental components (Gilbuena et al., 2013a). In this study, the abandonment phase was not considered since open channels and river improvements are taken as permanent structures that are only subject to either maintenance or further enhancement due to their long term (or perpetual) use in Metro Manila (Gilbuena et al., 2013a). Details of this method are described as follows: Assessment criteria are categorized into 2 groups, A and B. "
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    Full-text · Article · Oct 2013 · Journal of Environmental Management
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    No preview · Conference Paper · May 2013