Godwin A. Ayoko

This book discusses the physicochemical changes (transformations) that metals deposited on urban road surfaces undergo during dry weather periods, in order to provide insights into their potential impacts on stormwater quality. Based on extensive field experiments, and laboratory and data analyses, it examines transformation characteristics of metals with respect to the particle size of road dust, antecedent dry days and land uses. Further, it proposes a new risk-assessment methodology, improving the original human health-risk indices based on the transformation characteristics and potential bioavailability of metals in order to evaluate the risks posed by metals in stormwater. This book is of interest to researchers and decision-makers developing appropriate pollution mitigation measures to enhance the quality of stormwater, targeting the effective reuse of stormwater in urban areas.

This book presents a detailed analysis in relation to pollutant processes and transport pathways encompassing atmospheric pollutants, atmospheric deposition and build-up on road surfaces of traffic generated key pollutants. The research study undertaken by the authors created extensive knowledge relating to the relevant processes and establishing their relationships as a chain of processes. The information presented in this book was derived based on comprehensive experimental investigations including field sampling, laboratory testing, mathematical modelling and multivariate and univariate statistical data analyses. The knowledge presented will be of particular interest to readers such as stormwater treatment design specialists, decision-makers and urban planners since these outcomes provide practical suggestions and recommendations to effective urban stormwater treatment design.

This multi-disciplinary book provides practical solutions for safeguarding the sustainability of the urban water environment. Firstly, the importance of the urban water environment is highlighted and the major problems urban water bodies face and strategies to safeguard the water environment are explored. Secondly, the diversity of pollutants entering the water environment through stormwater runoff are discussed and modeling approaches for factoring in climate change and future urban and transport scenarios are proposed. Thirdly, by linking the concepts of sustainable urban ecosystems and sustainable urban and transport development, capabilities of two urban sustainability assessment models are demonstrated. To achieve sustainability of the urban water environment and future viability of treatment strategies, a framework that supports their adaptation to future challenges is required. A conceptual framework which involves a decision making cycle integrating best management practices and best planning practices that can be adopted to ensure future adaptation is also presented. Taking a holistic approach and with practical applications for modeling and predictions, Sustainable Urban Water Environment will strongly appeal to postgraduate students, practitioners and researchers in environmental science, environmental policy and urban transport planning. Contents: Preface Foreword Part I: Risks and Challenges 1. Spreading Urbanisation and the Water Environment 2. Changing Climate and the Water Environment 3. Sustaining Urban Water Environments Part II: Impacts and Predictions 4. Measuring Urban Water Pollutants 5. Source Contribution of Pollutants 6. Modelling Water Pollutant Processes Part III: Opportunities and Directions 7. Determining Urban Sustainability Performance 8. Assessing Sustainability of Urban Ecosystems 9. Achieving Urban Sustainability and Implications for the Urban Water Environment 10. Conclusion: Moving Towards Sustainable Water Futures References Index