Kenneth Hewitt – författare

An introduction to hazards, human vulnerability and disaster, paying particular attention to the more severe or novel risks and disaster that affect the general public. The book is split into two parts, the first of which gives an overview of the field of risk and disaster in terms of three perspectives: hazards perspective; vulnerability perspective and the active perspective. The second part illustrates and develops these ideas in relation to some of the more severe dangers and disasters of the twentieth century, for example, earthquake risk, cities at risk and the civil disasters of war.

An introduction to hazards, human vulnerability and disaster, paying particular attention to the more severe or novel risks and disaster that affect the general public. The book is split into two parts, the first of which gives an overview of the field of risk and disaster in terms of three perspectives: hazards perspective; vulnerability perspective and the active perspective. The second part illustrates and develops these ideas in relation to some of the more severe dangers and disasters of the twentieth century, for example, earthquake risk, cities at risk and the civil disasters of war.

This volume is mainly concerned with landform and sediment associations in cold regions, and their transformations over time and space in response to changing environments. Most of the chapters adopt a landscape approach, with the goal of describing, interpreting and comparing regional landscapes. The emphasis here is on landscapes that are formed or constrained by cold conditions. In particular, we look at landform morphology, earth surface processes and sediments reflecting the presence of frost, ice and melt water, and the influence upon landscape of cold-adapted plants and animals. The notion of "transition" is employed to address the ways in which environmental changes are uniquely expressed through adjustments in landforms and earth surface processes. It is shown that geomorphic transitions have, or tend to, generate their own temporal and spatial shape. They involve mechanisms or patterns of adjustment distinct from, and not readily obvious in, the mere chronology of, say, climate change or tectonics. Examples are discussed from high mountain and glacierized environments, from cold lowlands and coasts.Appropriate theoretical concerns are addressed in relation to the slope stability and extreme mass movement events, paraglacial regimes, changing distributions of permafrost, delta and other cold coastal development.

This richly illustrated book is both a visitor’s guide to one of southwestern Ontario’s most striking landforms – the Elora Gorge on the Upper Grand River – and a thorough, accessible introduction to its natural and recent human history.The book introduces rivers that flow in bedrock, between rock walls and through precipitous gorges, unlike the subdued terrain that the last Ice Age bequeathed most of southwestern Ontario. It then leads the visitor to three viewpoints on and three excursions through the gorge, with a wealth of information about its rocks, fossils, caves, cliffs, rockslides, rockfalls, floods and erosional processes. It takes the reader through five “ages” of the gorge. In the First Age the gorge bedrock originated as reef limestone 430 million years ago in prehistoric tropical seas. The Second Age saw the gorge rocks make a great, 400-million-year journey from tropical seas to the heart of a continent via plate tectonics. In the Third Age, the retreating Laurentide Ice Sheet created conditions 17,000 to 15,000 years ago in which ice lobes, glacial lakes and meltwater spillways interacted to incise the gorge in an ice-free area known as the Ontario Island. In the Fourth Age the gorge, nestled in an immense forest, developed at a slower pace moderated by dense woods, fallen branches and beaver dams. In the Fifth Age, the gorge entered the Anthropocene as European settlers came to disrupt and dominate its development and unlock its secrets.Full of original photographs, maps and diagrams, Rivers in Rock is an authoritative guide to the Elora Gorge that will fascinate visitors and researchers alike.

This volume is mainly concerned with landform and sediment associations in cold regions, and their transformations over time and space in response to changing environments. Most of the chapters adopt a landscape approach, with the goal of describing, interpreting and comparing regional landscapes. The emphasis here is on landscapes that are formed or constrained by cold conditions. In particular, we look at landform morphology, earth surface processes and sediments reflecting the presence of frost, ice and melt water, and the influence upon landscape of cold-adapted plants and animals. The notion of 'transition' is employed to address the ways in which environmental changes are uniquely expressed through adjustments in landforms and earth surface processes. It is shown that geomorphic transitions have, or tend to, generate their own temporal and spatial shape. They involve mechanisms or patterns of adjustment distinct from, and not readily obvious in, the mere chronology of, say, climate change or tectonics. Examples are discussed from high mountain and glacierized environments, from cold lowlands and coasts.Appropriate theoretical concerns are addressed in relation to the slope stability and extreme mass movement events, paraglacial regimes, changing distributions of permafrost, delta and other cold coastal development.

The Karakoram contains the greatest concentration of glaciers and most of the largest ice masses outside high latitudes. They comprise major stores and sources of fresh water in an otherwise extreme, continental, dry region. As many as 200 million people living downstream, in the valleys of the Indus and Yarkand Rivers, depend on melt waters from snow and ice. They are at risk from climate-change impacts on glaciers and water supply, and from hazards such as glacial lake outburst floods. Useful research initiatives go back to the nineteenth century, but coverage has generally been limited geographically and has not been continuous over time. It is almost 80 years since a monograph was devoted to the Karakoram glaciers. The book presents a comprehensive overview, including statistics for the ice cover, glacier mass balance and dynamics, glacierized landscapes, rock glaciers, water resources and environmental hazards. Published glaciological and related research is surveyed along with expedition reports and archival materials in several languages. The expanding potential of satellite coverage is exploited, but conditions and processes reported from field investigations are the main focus. Previously unpublished observations by the author are presented, based on some 45 years of work in the region. Broad understanding of the glacial environment is used to address emerging concerns about the High Asian cryosphere and the fate of its glaciers. These are discussed in relation to the pressing issues of water supply, environmental risk and sustainability. Questions of what is not known help identify much needed monitoring and research. The book is of interest to researchers, professionals, and those studying glaciers, mountain environments, water resources and environmental hazards. The topics discussed should be of concern for anyone involved in regional development and global change in South and Inner Asia.