GIS-Based Multicriteria Site Selection for Flood Retention: A Case Study in Rembau, Negeri Sembilan, Malaysia Gs Haji Rosli bin Yusop, Dr Zamri bin Ismail
Faculty of Built Environment and Surveying, Universiti Teknologi Malaysia, Skudai, Johor,
Malaysia
Abstract
Urban flooding is a growing concern in Malaysia, particularly in vulnerable districts like Rembau, Negeri Sembilan. This study identifies optimal locations for flood retention ponds by integrating a Multi-Criteria Decision Analysis (MCDA) framework with Geographic Information System (GIS). Criteria considered include land use, slope, soil permeability, hydrological factors, proximity to river networks, and existing drainage infrastructure. The Analytic Hierarchy Process (AHP) was applied to derive weights for each parameter based on expert judgment and stakeholder input. Weighted overlay analysis generated suitability maps highlighting priority zones, especially in moderately sloped areas near natural waterways. Field validation confirmed site feasibility. Findings demonstrate the practical value of GIS-MCDA integration for flood mitigation and provide a replicable model for other flood-prone regions.
