River Science


Book Description

River Science is a rapidly developing interdisciplinary field at the interface of the natural sciences, engineering and socio-political sciences. It recognises that the sustainable management of contemporary rivers will increasingly require new ways of characterising them to enable engagement with the diverse range of stakeholders. This volume represents the outcome of research by many of the authors and their colleagues over the last 40 years and demonstrates the integral role that River Science now plays in underpinning our understanding of the functioning of natural ecosystems, and how societal demands and historic changes have affected these systems. The book will inform academics, policy makers and society in general of the benefits of healthy functioning riverine systems, and will increase awareness of the wide range of ecosystem goods and services they provide.




River, Coastal and Estuarine Morphodynamics. RCEM 2009, Two Volume Set


Book Description

Coastal, estuarine, fluvial and submarine morphodynamics encompass some of the leading processes shaping our planet. They stem mainly, but not only, from the interaction of water in motion and movable sediment boundaries, resulting in morphological changes produced by erosion, transport and deposition of sediments that generate a variety of landsca







Wide Rivers Crossed


Book Description

In Wide Rivers Crossed, Ellen Wohl tells the stories of two rivers—the South Platte on the western plains and the Illinois on the eastern—to represent the environmental history and historical transformation of major rivers across the American prairie. Wohl begins with the rivers’ natural histories, including their geologic history, physical characteristics, ecological communities, and earliest human impacts, and follows a downstream and historical progression from the use of the rivers’ resources by European immigrants through increasing population density of the twentieth century to the present day. During the past two centuries, these rivers changed dramatically, mostly due to human interaction. Crops replaced native vegetation; excess snowmelt and rainfall carried fertilizers and pesticides into streams; and levees, dams, and drainage altered distribution. These changes cascaded through networks, starting in small headwater tributaries, and reduced the ability of rivers to supply the clean water, fertile soil, and natural habitats they had provided for centuries. Understanding how these rivers, and rivers in general, function and how these functions have been altered over time will allow us to find innovative approaches to restoring river ecosystems. The environmental changes in the South Platte and the Illinois reflect the relentless efforts by humans to control the distribution of water: to enhance surface water in the arid western prairie and to limit the spread of floods and drain the wetlands along the rivers in the water-abundant east. Wide Rivers Crossed looks at these historical changes and discusses opportunities for much-needed protection and restoration for the future.




A Suitability Analysis of the Wetlands Along the Middle Mississippi River Floodplain for Riverine Nitrate Attenuation


Book Description

Persistently elevated nitrogen loads discharged to the Gulf of Mexico from the Mississippi and Atchafalaya rivers have been shown by a vast body of literature to be the cause of recurring hypoxic conditions in the Gulf of Mexico. Riverine wetlands have been shown to be important ecosystems capable of substantially reducing nitrogen loads delivered downstream through N removal processes including denitrification, anaerobic ammonium oxidation, and plant uptake. In order to assess the relative potential of wetland sites for nitrogen attenuation, a suitability analysis was performed to identify the relative nitrogen attenuation potential of wetlands within the Middle Mississippi River (MMR) floodplain. For this assessment, the literature on nitrogen cycling in riverine wetlands was used to identify variables which are associated with denitrification potential. Data for these variables were sourced from publicly available geospatial datasets and floodplain inundation frequency estimates using a hydraulic model. The variables compiled for this analysis included flood frequency, soil drainage class, soil hydrologic class, soil pH, soil texture, land use, and soil organic carbon. Principle component analysis was applied to the dataset to reduce the number of variables in the suitability model. The results of the principle components analysis revealed that the first four components explained 77% of the variation within the dataset of potential denitrification variables. As a result of the PCA analysis, the variables Soil Hydrologic Class, Soil Organic Carbon, Land Cover, Soil pH, SSURGO's Flood Frequency, and Flood Exceedance Probability were used to evaluate riverine wetland areas potential for denitrification under two hydrologic connection scenarios, a "with-levee" and a "no-levee" condition. For the with levee scenario, there were 66,146 ha of floodplain that attained a suitability rating of average potential, an additional 16,937 ha of floodplain attained high potential, and 706 ha of floodplain were rated as having very-high potential. The second scenario assumed removal of levees in the study area. In this scenario, there were 65,897 ha in the floodplain that attained a suitability rating of average potential. There were 34,457 ha in the study segment that attained a rating of high potential, whereas 510 ha attained a very-high potential on the suitability scale. These results were then analyzed by levee system, comparing economic and population data with the results of the suitability analysis. In particular, the amount of area within a levee system achieving a rating of high potential vs. the total property value within the levee system was compared to determine which systems would be best candidates for strategic reconnection. This analysis suggests that the Bois & Brule, the Big Five, and the Grand Tower / Degonia Levee systems are the most suitable systems for strategic reconnection efforts in the study area.







The Variability of Large Alluvial Rivers


Book Description

Experts detail specific river engineering problems and a geomorphic-engineering approach to large river management.




SUSTAINABLE FUTURES, WATER INFRASTRUCTURE LEGACIES AND RACIAL CAPITALISM


Book Description

Over the past several decades, flooding events in the United States have become the most frequent and costliest natural disaster. In the US, city and regional leaders are planning new water and flood mitigation infrastructure in response to the challenges of flooding, uneven urbanization, and racialized exclusion. Historically, projects to keep water out have never been universal or evenly applied. Yet, 'learning to live' with water, a key tagline in current sustainable development paradigms, masks how histories of racialized land development are entangled with contemporary water infrastructure projects and are productive of regional planning power. This dissertation centers racial capitalism in analysis of how contemporary water infrastructure projects are entangled with, and informed by, histories of racialized land development in the mid-Mississippi River Region. Through two case studies on flood mitigation infrastructure in eastern Missouri, I trace the historic development of infrastructures that shape the ongoing racialization of space, infrastructure (re)development and community vulnerability to flooding today. The case studies draw from a range of data, including archival research on histories of land and infrastructure development, participant observation of planning meetings, professional conferences, and local neighborhood initiatives, and field observations of the built environment. I argue that 1) scholarship concerned with social-environmental inequities should engage racial capitalism as a framework to "provincialize" urban theory and environmental racism as a means to theorize uneven infrastructural provisioning as a mode of urbanization that (re)produces social difference and value creation under racial capitalism, 2) the historical development of flood control in the Mississippi region was fundamental to the development of racial capitalism because it consolidated regional planning power through methods of social and environmental domination, and 3) contemporary infrastructural redevelopment and flood mitigation projects must contend with the path dependencies of structural racism to disrupt existing cycles of marginalization across social differences to deliver meaningfully on equity goals. Ultimately, this study finds that flood-mitigation infrastructures, including levees, floodways, and dams, on the Missouri River and gray and green stormwater infrastructure (GSI) in the City of St. Louis are embedded in broader social-environmental networks and regional power blocs, whose regional history and dynamics have created distinct patterns of uneven urbanization and vulnerability to flooding disasters. Because infrastructure projects are embedded in the built environment for decades, the social relations comprising their implementation, or lack thereof, reach into present and future development considerations. Thus, when planning projects fail to grapple with path dependencies of past infrastructure projects, they may reproduce structural racism and re-create patterns of uneven urbanization and vulnerability to flooding disasters.