Design and Evaluation of a Sustainable Permeable Pavement System

Thesis Abstract

Urbanization and increasing impervious surfaces have intensified stormwater runoff, leading to frequent flooding, urban heat island effects, and groundwater depletion in metropolitan areas. Traditional pavement systems contribute significantly to these issues due to their limited permeability and inadequate stormwater management capabilities. Consequently, the demand for sustainable infrastructure solutions has gained prominence, with permeable pavements emerging as a viable approach to mitigate runoff, improve water quality, and enhance urban resilience. This study aims to design an optimized, environmentally sustainable permeable pavement system and evaluate its hydrological, structural, and environmental performance within an urban context. The specific objectives include developing a comprehensive pavement design integrating eco-friendly materials, assessing its runoff reduction capacity through empirical field measurements, examining structural integrity using laboratory and in-situ tests, and evaluating its environmental impacts via lifecycle assessment. The research employs a mixed-methods approach, combining quantitative and qualitative techniques. A hierarchical research design was adopted, with the quantitative component involving the construction and monitoring of a full-scale pilot pavement section in a metropolitan area over a 12-month period, utilizing a sample size of 10 test sections composed of different permeable materials and configurations. Data collection instruments include remote sensing for site selection, flow gauges and water quality sensors for stormwater runoff analysis, structural load testing devices for capacity assessment, and environmental sampling kits for pollutant analysis. Qualitative data were gathered through structured interviews with urban planners and civil engineers involved in the project, providing insights on design feasibility and implementation challenges. Data analysis methods comprise multiple regression analysis to evaluate factors influencing runoff reduction, analysis of variance (ANOVA) to compare structural performance across different pavement configurations, and lifecycle assessment (LCA) to determine environmental impacts. The anticipated findings suggest that the optimized permeable pavement system can reduce stormwater runoff by up to 70% compared to conventional pavements, with certain configurations demonstrating enhanced structural resilience underneath typical urban loads. Material analysis is expected to identify eco-friendly, locally sourced aggregates and permeable concrete mixes as key components without compromising durability. The environmental evaluation is projected to reveal significant reductions in pollutant loads entering urban water bodies, along with favorable LCA outcomes indicating improved sustainability profiles. These outcomes will serve to validate the ecological, structural, and hydrological benefits of the proposed design. This research contributes to existing knowledge by providing an integrated framework for designing, implementing, and evaluating sustainable permeable pavement systems that are tailored for urban environments. It extends the theoretical framework established by the hydrological efficiency theory and the sustainable materials theory, offering empirical evidence of their application in pavement engineering. It also fills existing gaps related to the long-term performance and environmental impacts of permeable systems in diverse climatic regions. The study’s results will inform best practices for sustainable urban infrastructure development and offer policymakers and engineers evidence-based guidelines for permeable pavement adoption. In conclusion, the study advocates for the widespread implementation of well-designed permeable pavements as a sustainable alternative to traditional asphalt and concrete surfaces. It recommends adopting locally sourced, environmentally compatible materials, integrating structural health monitoring systems, and developing standardized performance criteria. Further research is suggested to investigate the long-term performance in varying climatic zones and to explore innovative sustainable materials, such as biocomposites. Overall, this research underscores the pivotal role of permeable pavement systems in advancing resilient and sustainable urban landscapes worldwide.