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"Wohl, Ellen E., 1962- author"
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Rivers in the landscape
Rivers in the Landscape: Science and Management offers a comprehensive and accessible overview of the current state of knowledge for river process and form, taking a holistic approach to the subject with coverage of integrated river science and management in practice. The processes and forms present in channelized surface flow-rivers-are systematically explored in this book to * emphasize the connectivity between rivers and the greater landscape by explicitly considering the interactions between rivers and tectonics, climate, biota, and human activities; * provide a concise summary of the current state of knowledge for physical process and form in rivers; * reflect the diversity of river environments, from mountainous, headwater channels to large, lowland, floodplain rivers and from the arctic to the tropics; * reflect the diverse methods that scientists use to characterize and understand river process and form, including remote sensing, field measurements, physical experiments, and numerical simulations; * reflect the increasing emphasis on quantification in fluvial geomorphology and the study of Earth surfaces in general; * provide both an introduction to the classic, foundational papers on each topic, and a guide to the latest, particularly insightful and integrative references. Aimed at advanced undergraduate students, graduate students, and professionals looking for a concise summary of physical aspects of rivers, this book emphasizes general principles and conceptual models, as well as concrete examples of each topic drawn from the extensive literature on river process and form.
eBook
Rivers in the landscape
This title offers a comprehensive and accessible overview of the current state of knowledge for river process and form, taking a holistic approach to the subject with coverage of integrated river science and management in practice.
Book
Disconnected rivers
This important and accessible book surveys the history and present condition of river systems across the United States, showing how human activities have impoverished our rivers and impaired the connections between river worlds and other ecosystems.Ellen Wohl begins by introducing the basic physical, chemical, and biological processes operating in rivers. She then addresses changes in rivers resulting from settlement and expansion, describes the growth of federal involvement in managing rivers, and examines the recent efforts to rehabilitate and conserve river ecosystems. In each chapter she focuses on a specific regional case study and describes what happens to a particular river organism-a bird, North America's largest salamander, the paddlefish, and the American alligator-when people interfere with natural processes.
eBook
Wide Rivers Crossed
InWide 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.
eBook
Transient landscapes : insights on a changing planet
\"Landscape-the unique combination of landforms, plants, animals, and weather that compose any natural place-is inherently transient. Each essay in Transient landscapes, Wohl introduces this idea of an ever-shifting, ever-transitioning global landscape, revealing how to see the ubiquity of landscape transience, both that which results through the earth's natural environmental and climatological process and which comes from human intervention.\"-- Provided by publisher.
Book
Transient Landscapes
Landscape-the unique combination of landforms, plants, animals, and weather that compose any natural place-is inherently transient. Each essay inTransient Landscapesintroduces this idea of a constantly metamorphosing global landscape, revealing how to see the ubiquity of landscape transience, both that which results through Earth's natural environmental and climatological processes and that which comes from human intervention.The essays are grouped by type of environmental change: long-term, large-scale transformation driven by geologic forces such as tectonic uplift and volcanism; natural variability at shorter time scales, such as seasonal flooding; and modifications resulting from human activities, such as timber harvest, land drainage, and pollution. Each essay is set in a unique geographic location-including such diverse places as New Zealand, Northern California, Costa Rica, and the Scottish Highlands-and is largely drawn from Wohl's personal experience researching in the field.A combination of travel writing, nature writing, and science writing,Transient Landscapesis a beautiful and thoughtful journey through the natural world.
eBook
Island of Grass
Island of Grasstells the story of the Cathy Fromme Prairie Natural Area, a 240-acre preserve surrounded by housing developments in Fort Collins, Colorado. This small grassland is a remnant of the once-vast prairies of the West that early European explorers and settlers described as seas of grass.Agricultural land use and urban expansion during the past two centuries have fragmented and altered these prairies. All that remains today are small islands. These remnants cannot support some of the larger animals that once roamed the prairie, but they continue to support a diverse array of plants and animals and can still teach us much about grassland ecology. Through her examinations of daily changes during walks across the Fromme Prairie over the course of a year, Ellen Wohl explores one of the more neglected ecosystems in North America, describing the geology, soils, climate, ecology, and natural history of the area, as well as providing glimpses into the lives of the plants, animals, and microbes inhabiting this landscape. Although small in size, pieces of preserved shortgrass prairie like the Cathy Fromme Prairie Natural Area are rich, diverse, and accessible natural environments deserving of awareness, appreciation, and protection. Anyone concerned with the ecology and conservation of grasslands in general, the ecology and conservation of open space in urban areas, or the natural history of Colorado will be interested in this book.
eBook
world of rivers
Far from being the serene, natural streams of yore, modern rivers have been diverted, dammed, dumped in, and dried up, all in efforts to harness their power for human needs. But these rivers have also undergone environmental change. The old adage says you can’t step in the same river twice, and Ellen Wohl would agree—natural and synthetic change are so rapid on the world’s great waterways that rivers are transforming and disappearing right before our eyes. A World of Rivers explores the confluence of human and environmental change on ten of the great rivers of the world. Ranging from the Murray-Darling in Australia and the Yellow River in China to Central Europe’s Danube and the United States’ Mississippi, the book journeys down the most important rivers in all corners of the globe. Wohl shows us how pollution, such as in the Ganges and in the Ob of Siberia, has affected biodiversity in the water. But rivers are also resilient, and Wohl stresses the importance of conservation and restoration to help reverse the effects of human carelessness and hubris. What all these diverse rivers share is a critical role in shaping surrounding landscapes and biological communities, and Wohl’s book ultimately makes a strong case for the need to steward positive change in the world’s great rivers.
eBook