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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

Despite the importance of rivers to industry, agriculture, the climate system, and global ecosystems, our current knowledge of river discharge (volume of available water per unit time) is surprisingly poor for many regions of the world as political cloistering, aging infrastructure, and rapid human changes limit our ability to understand global surface waters holistically. Closing this knowledge gap is critical for better management of surface water in light of drought and increasing human demand for fresh water, especially as the earth's hydrological system responds to a changing climate. Nowhere on earth is this hydrologic uncertainty more acute than the Arctic, where already difficult-to-obtain in situ observations have declined in recent decades and where rising air, soil, and water temperatures exert outsized impact on natural systems. Furthermore, even basic fluvial science is underdeveloped in the Arctic, as routine field measurements are logistically challenging and sometimes dangerous to obtain. To these ends, this dissertation seeks to combat these global hydrologic challenges, and is centered on rivers at the intersection between geography, fluvial hydrology, and geomorphology. Specifically, this dissertation asks and answers three interconnected questions that I believe are critical for improved scientific understanding of global and Arctic hydrology: (1) Can river flows and freshwater resources be quantified globally, even in remote and/or politically sensitive regions? (2) What can we learn about rivers by thinking about them spatially? (3) How do rivers of the cryosphere differ from their better-studied temperate counterparts? The work herein is built on extensive field work, satellite remote sensing, modeling, and GIS, and contains seven chapters. This document compiles original information about the geomorphology of rivers (that is, how they shape and are shaped by the landscape, Chapters 1, 2, 4, and 7) and applies that knowledge to develop a novel methodology for estimating river discharge from remotely sensed imagery (Chapters 2, 3, and 6). Building on this work, this document also critically considers how these methods might influence local politics (Chapter 5). In sum, this document represents an attempt to holistically understand rivers from numerous vantage points, and succeeds in reveling previously undiscovered river behavior by applying a geospatial paradigm to fluvial science.

Correspondence between Mr. E.B. Rivers and Gen. Alvaro Obregón, in which the former supports Gen. Obregón's presidential candidacy and gives him news about the opinions people have in the United States on the political state of affairs in Mexico. Gen. Alvaro Obregón thanks him for his willingness to support his candidacy and informs that Mr. Baldomero A. Almada will invterview him to coordinate the campaign work. / Correspondencia entre el Sr. E.B. Rivers y el Gral. Alvaro Obregón, en la cual el primero apoya al Gral. Obregón en su candidatura y le da noticias sobre opiniones que se tienen en Estados Unidos sobre la situación en México. El Gral. Alvaro Obregón agradece la disposición que tiene para apoyar su candidatura y le participa queel Sr. Baldomero A. Almada se entrevistará con él a fin de coordinar los trabajos de campaña.

"Many cities across the globe are rediscovering their rivers. After decades or even centuries of environmental decline and cultural neglect, waterfronts have been vamped up and become focal points of urban life again; hidden and covered streams have been daylighted while restoration projects have returned urban rivers in many places to a supposedly more natural state. This volume traces the complex and winding history of how cities have appropriated, lost, and regained their rivers. But rather than telling a linear story of progress, the chapters of this book highlight the ambivalence of these developments. The four sections in Rivers Lost, Rivers Regained discuss how cities have gained control and exerted power over rivers and waterways far upstream and downstream; how rivers and floodplains in cityscapes have been transformed by urbanization and industrialization; how urban rivers have been represented in cultural manifestations, such as novels and songs; and how more recent strategies work to redefine and recreate the place of the river within the urban setting. At the nexus between environmental, urban, and water histories, Rivers Lost, Rivers Regained points out how the urban-river relationship can serve as a prime vantage point to analyze fundamental issues of modern environmental attitudes and practices"--Provided by publisher

In northwestern Siberia, rivers historically played an essential role in structuring economic, cultural, and administrative space. The rivers' role in spatial perception is reflected in vocabulary of some local languages. With the recent development of roads and railroads, a new way has emerged to structure socioeconomic and political space. The two systems of spatial structuring contradict each other, and their relative importance for different local groups depends on their professional and ethnocultural affiliation. This leads to different perceptions of space, distances, and geographic directions by the members of these groups. Furthermore, since the administrative borders reflect the "river" system, but the administrative power is increasingly projected along the roads and railroads, the conflict between the two systems has a political dimension.