Download or read book Geomorphic Comparison of Two Atlantic Coastal Rivers written by Benjamin C. Wilkins and published by . This book was released on 2009 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Substrate size and mobility are important to Atlantic salmon (Salmo salar) spawning and rearing success. Channel geometry is a control on bedload mobility in streams. It is believed that channel morphology in many Maine rivers has been altered by land use practices, creating wider and shallower channels, and lowering stream competence. If correct, these changes may be partially responsible for the limited number of returning salmon currently observed in Maine coastal rivers. To evaluate the magnitude of these changes, I performed a statistical comparison of channel morphology between two Atlantic coastal streams: the Narraguagus River in Downeast Maine and the Jacquet River in northern New Brunswick, Canada. Compared to the Narraguagus River, the Jacquet River has relatively healthy returns of adult salmon. Both watersheds have similar drainage areas (Narraguagus 588 km2; Jacquet 510 km2) and mean annual precipitation (1244 mm; 1200 mm), but differing average channel gradients (0.16%; 0.51%) and longitudinal profiles. During the summer of 2007, I surveyed a 13.6-km section of the Narraguagus with a drainage area range of 129-247 km2, and a 10.4-km section of the Jacquet with a drainage area range of 94-265 km2. I made measurements of active and bankfull width and depth, and channel gradient at 100-m intervals, and performed grain-size counts at 200-m intervals. I also measured gradient and width in a GIS-based analysis. Results of my analysis show that channel gradient is likely the most influential factor on Atlantic salmon habitat as it relates to sediment size. The two rivers exhibit no significant difference in width-to-depth ratio, when low-gradient outliers in the Narraguagus River are removed. Predicted median river-bed grain sizes were calculated using two methods: (1) from the empirical relationship between basal shear stress and measured grain size; and (2) using the Shields parameter and remote sensing data only. Measured and predicted grain sizes reveal finer river-bed sediments on the Narraguagus River, however, Shields parameter calculations show that sediment should be mobile in both streams. I compare these predictions to field-based habitat mapping on the Narraguagus River. Based on predicted grain sizes, I expect nearly continuous Atlantic salmon spawning (28-95%) and rearing (95-100%) habitat on the Jacquet, and much less spawning (47-62%) and rearing (57-68%) habitat on the Narraguagus. This is likely because the Narraguagus River is segmented into reaches of steeper gradient (S> 0.002) with potentially good habitat, and flatter reaches (S
Download or read book U S Geological Survey Professional Paper written by and published by . This book was released on 1984 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gravel Bed Rivers written by Michael Church and published by John Wiley & Sons. This book was released on 2012-02-10 with total page 605 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gravel-Bed Rivers: Processes, Tools, Environments presents a definitive review of current knowledge of gravel-bed rivers, derived from the 7th International Gravel-bed Rivers Workshop, the 5-yearly meeting of the world’s leading authorities in the field. Each chapter in the book has been specifically commissioned to represent areas in which recent progress has been made in the field. The topics covered also represent a coherent progression through the principal areas of the subject (hydraulics; sediment transport; river morphology; tools and methods; applications of science). Definitive review of the current knowledge of gravel-bed rivers Coverage of both fundamental and applied topics Edited by leading academics with contributions from key researchers Thoroughly edited for quality and consistency to provide coherent and logical progression through the principal areas of the subject.
Download or read book Landscape Evolution of Continental Scale River Systems written by James W. Sears and published by Elsevier. This book was released on 2024-03-14 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Landscape Evolution of Continental-Scale River Systems: A Case Study of North America's Pre-Pleistocene Bell River Basin provides a detailed case study and complete analysis of this continental-scale North American paleo-river system. The book uses detrital zircon provenance data to link incision of the Grand Canyon to deposition of its erosional products in a giant drowned delta in the Labrador Sea, in the context of sedimentary source-to-sink processes and Plio-Pleistocene continental drainage changes. The case study describes the tectonic changes in this continental-scale paleo-river system, with global implications, and contrasts this system to other continental-scale river systems around the world. This book is a valuable reference for postgraduate students, academics and researchers in the fields of geology, fluvial geomorphology and other geosciences. Readers will be able to use this detailed case study to better understand the implications for how active tectonics of headwaters regions influence delta deposition in continental-scale river systems around the world. - Details the landscape evolution of a continental-scale paleo-river system using detrital zircon geochronology with fluvial processes - Provides a multidisciplinary case study with applications to other continental-scale river systems around the world - Compares and contrasts the Bell river to the Amazon and uses these examples as analogs to discuss other systems
Download or read book New Publications of the Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1989 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The SAGE Handbook of Geomorphology written by Kenneth J Gregory and published by SAGE. This book was released on 2011-06-13 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geomorphology is the study of the Earth′s diverse physical land-surface features and the dynamic processes that shape these features. Examining natural and anthropogenic processes, The SAGE Handbook of Geomorphology is a comprehensive exposition of the fundamentals of geomorphology that examines form, process, and applications of the discipline. Organized into five substantive sections, the Handbook is an overview of: • Foundations and Relevance: including the nature and scope of geomorphology; the origins and development of geomorphology; the role and character of theory in geomorphology; geomorphology and environmental management; and geomorphology and society • Techniques and Approaches: including observations and experiments; geomorphological mapping; the significance of models; process and form; dating surfaces and sediment; remote sensing in geomorphology; GIS in geomorphology; biogeomorphology; human activity • Process and Environment: including the evolution of regolith; weathering; fluids, flows and fluxes; sediment transport and deposition; hill slopes; riverine environments; glacial geomorphology; periglacial environments; coastal environments; aeolian environments; tropical environments; karst and karst processes • Environmental Change: including landscape evolution and tectonics; interpreting quaternary environments; environmental change; disturbance and responses to geomorphic systems • Conclusion: including challenges and perspectives; and a concluding review The Handbook has contributions from 48 international authors and was initially organized by the International Association of Geomorphologists. This will be a much-used and much-cited reference for researchers in Geomorphology, Physical Geography and the Environmental Sciences.
Download or read book Treatise on Geomorphology written by and published by Academic Press. This book was released on 2013-02-27 with total page 6392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The changing focus and approach of geomorphic research suggests that the time is opportune for a summary of the state of discipline. The number of peer-reviewed papers published in geomorphic journals has grown steadily for more than two decades and, more importantly, the diversity of authors with respect to geographic location and disciplinary background (geography, geology, ecology, civil engineering, computer science, geographic information science, and others) has expanded dramatically. As more good minds are drawn to geomorphology, and the breadth of the peer-reviewed literature grows, an effective summary of contemporary geomorphic knowledge becomes increasingly difficult. The fourteen volumes of this Treatise on Geomorphology will provide an important reference for users from undergraduate students looking for term paper topics, to graduate students starting a literature review for their thesis work, and professionals seeking a concise summary of a particular topic. Information on the historical development of diverse topics within geomorphology provides context for ongoing research; discussion of research strategies, equipment, and field methods, laboratory experiments, and numerical simulations reflect the multiple approaches to understanding Earth’s surfaces; and summaries of outstanding research questions highlight future challenges and suggest productive new avenues for research. Our future ability to adapt to geomorphic changes in the critical zone very much hinges upon how well landform scientists comprehend the dynamics of Earth’s diverse surfaces. This Treatise on Geomorphology provides a useful synthesis of the state of the discipline, as well as highlighting productive research directions, that Educators and students/researchers will find useful. Geomorphology has advanced greatly in the last 10 years to become a very interdisciplinary field. Undergraduate students looking for term paper topics, to graduate students starting a literature review for their thesis work, and professionals seeking a concise summary of a particular topic will find the answers they need in this broad reference work which has been designed and written to accommodate their diverse backgrounds and levels of understanding Editor-in-Chief, Prof. J. F. Shroder of the University of Nebraska at Omaha, is past president of the QG&G section of the Geological Society of America and present Trustee of the GSA Foundation, while being well respected in the geomorphology research community and having won numerous awards in the field. A host of noted international geomorphologists have contributed state-of-the-art chapters to the work. Readers can be guaranteed that every chapter in this extensive work has been critically reviewed for consistency and accuracy by the World expert Volume Editors and by the Editor-in-Chief himself No other reference work exists in the area of Geomorphology that offers the breadth and depth of information contained in this 14-volume masterpiece. From the foundations and history of geomorphology through to geomorphological innovations and computer modelling, and the past and future states of landform science, no "stone" has been left unturned!
Download or read book Geological Survey Professional Paper written by and published by . This book was released on 1979 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Science in the Coastal Zone written by National Research Council and published by National Academies Press. This book was released on 1994-02-01 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book assesses the dimensions of our scientific knowledge as it applies to environmental problems in the coastal zone. The volume contains 10 papers that cover different aspects of science, management, and public policy concerning the coastal zone. A consensus is presented on several key issues confronting science for developing a more holistic approach in managing this region's intense human activities and important natural resources.
Download or read book World Geomorphology written by E. M. Bridges and published by Cambridge University Press. This book was released on 1990-11-30 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large scale relief features of the earth are emphasized to reveal how they are related to the major segments of the earth's crusts, known as lithospheric plates.
Download or read book Large Rivers written by Avijit Gupta and published by John Wiley & Sons. This book was released on 2008-02-28 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large Rivers: Geomorphology and Management explores an important topic in geomorphology and sedimentology: the form and function of major rivers. Our knowledge of the big rivers of the world is limited. It is currently difficult to recognise large rivers of the past from relict sedimentary deposits or to structure management policies for long international rivers. This exciting book brings together a set of papers on large rivers of the world, as a unique introduction to a demanding subject. The book includes thirty chapters and is organised into three sections. The first part is on the environmental requirements for creating and maintaining a major river system. The second is a collection of case studies on 14 large rivers from different continents, covering a range of physical environments. The third section includes chapters on the measurement and management of large rivers. First book to offer in a single volume state-of-the-art knowledge on management and geomorphology of large rivers of the world A pioneering study, pushing the boundaries of our knowledge related to big rivers Includes comprehensive case studies covering the major large rivers of the world including Amazon, Mississippi, Nile, Congo, Indus, and Mekong Written by a leading team of distinguished, international contributors Large Rivers: Geomorphology and Management is essential reading for postgraduate students and researchers in fluvial geomorphology, hydrology, sedimentary geology, and river management. It is also of relevance to engineers and environmental consultants in the private and public sectors working on major rivers of the world.
Download or read book Geological Survey Professional Paper written by Geological Survey (U.S.) and published by . This book was released on 1969 with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Geological Survey Bulletin written by and published by . This book was released on 1983 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book River Coastal and Estuarine Morphodynamics RCEM 2009 Two Volume Set written by Carlos Vionnet and published by CRC Press. This book was released on 2018-10-03 with total page 1116 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book From Continental Shelf to Slope written by K. Asch and published by Geological Society of London. This book was released on 2022-09-02 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume covers multi-disciplinary Research and Development contributions from Europe, Asia and North America on geology, geophysics, bathymetric and biological aspects, towards data sampling, acquisition, data analysis and its results, and innovative ways of data access. It also presents the development of processes to map, harmonize and integrate marine data across EEZ boundaries, an impressive example of which is the European EMODnet (European Marine Observation and Data network) initiative. EMODnet assembles scattered and partially hidden marine data into continentally harmonized geospatial data products for public benefit and increasingly within overseas collaboration. The volume also aims to shed light on an evaluation of biological and mineral resources and environmental assessments at continental shelf to slope depths. Western Pacific examples provide excellent case studies for this topic. Mapping of the ocean realm is not only for scientific purposes, but also for the people who live by the seas. Communication amongst scientists and multiple stakeholders is essential for living sustainably with the seas. In this volume we encourage dialogue amongst all the stakeholders.
Download or read book New Publications of the U S Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1990 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geomorphology from Space written by United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch and published by . This book was released on 1986 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt:
