[PDF] Hazards From Bank Erosion And Channel Migration In The Nisqually River Basin eBook

Author : Sourav Dey
Publisher : Taylor & Francis
Page : 296 pages
File Size : 14,60 MB
Release : 2022-06-30
Category : Social Science
ISBN : 1000563456

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This book explores fluvial processes and their consequences on river dynamics in India. It discusses the integration of geomorphic, hydrologic, and socio-economic data with various policies and decisions regarding sustainable river basin management. The volume looks at the origin and development of streams, chronology of fluvial geomorphology, fluvial system concept, process–form interaction, river dynamics, channel migration, flow regime, channel types, and hydraulic and morphometric parameters; and explains how changing hydro-geomorphological dynamics have influenced land use patterns, nature of fluids, behaviour of floods, etc. It examines channel migration vulnerability and bank erosion hazard vulnerability of the Torsa River in the eastern region of India as a case study using channel migration zone and Bank Erosion Hazard Index models. The book presents a new research framework based on field surveys, scientific investigations, and analytical techniques and methods to interpret key geoinformatics data. With its extensive illustrations, this book will be useful to students, teachers, and researchers of geography, earth sciences, environmental geology, and environment and disaster management. It will also interest geographers, civil engineers, hydrologists, geomorphologists, planners, and other individuals and organizations working on fluvial processes and riverbank erosion problems globally.

Author : Alex Gregory Tobergte
Publisher :
Page : 105 pages
File Size : 30,69 MB
Release : 2012
Category :
ISBN :

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Lateral streambank erosion is a naturally occurring process resulting from fluvial detachment and entrainment, and/or mass wasting leading to the migration of stream channels across their floodplains. Stream systems are inherently connected to their watersheds and as a result, changes within a watershed can greatly alter stream stability, including the rates of lateral channel migration. Geomorphic assessments have been developed by numerous researchers to track and document changes in streambank stability. Some geomorphic assessments have successfully identified unstable streambanks; however, they only provided a current snapshot of the streambanks. Research is needed to determine if geomorphic assessments are capable of accurately predicting long-term changes in streambank migration. The Bank Erosion Hazard Index (BEHI), a geomorphic assessment developed by Rosgen (2001), was used in conjunction with data collected in 2011 and historical data from 1996 by Harmel (1997) along a portion of the Upper Illinois River in Northeastern Oklahoma. Lateral channel migration rates were measured using ESRI ArcGIS10 and aerial photographs between the years 1995, 2003, and 2010. Results from a statistical analysis detected no significant differences in lateral channel migration rates between BEHI stability levels. Regression analysis further revealed that multiple factors were required to predict lateral channel migration rates. Stream power was also assessed to determine its ability to account for historical lateral channel migration rates, and was found to not be a valid predictor. Temporal and spatial changes in land use across the watershed were identified as the likely source of variation in lateral channel migration rates during the different time periods. In conclusion, the use of geomorphic assessments should be limited to characterizing current streambank stability.

Author :
Publisher : National Technical Info Svc
Page : 648 pages
File Size : 19,60 MB
Release : 1998
Category : Technology & Engineering
ISBN :

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This document is a cooperative effort among fifteen Federal agencies and partners to produce a common reference on stream corridor restoration. It responds to a growing national and international interest in restoring stream corridors.

Author : National Research Council
Publisher : National Academies Press
Page : 449 pages
File Size : 48,19 MB
Release : 2002-10-10
Category : Science
ISBN : 0309082951

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The Clean Water Act (CWA) requires that wetlands be protected from degradation because of their important ecological functions including maintenance of high water quality and provision of fish and wildlife habitat. However, this protection generally does not encompass riparian areasâ€"the lands bordering rivers and lakesâ€"even though they often provide the same functions as wetlands. Growing recognition of the similarities in wetland and riparian area functioning and the differences in their legal protection led the NRC in 1999 to undertake a study of riparian areas, which has culminated in Riparian Areas: Functioning and Strategies for Management. The report is intended to heighten awareness of riparian areas commensurate with their ecological and societal values. The primary conclusion is that, because riparian areas perform a disproportionate number of biological and physical functions on a unit area basis, restoration of riparian functions along America's waterbodies should be a national goal.

Author : National Research Council
Publisher : National Academies Press
Page : 580 pages
File Size : 45,10 MB
Release : 1992-01-01
Category : Technology & Engineering
ISBN : 9780309045346

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Aldo Leopold, father of the "land ethic," once said, "The time has come for science to busy itself with the earth itself. The first step is to reconstruct a sample of what we had to begin with." The concept he expressedâ€"restorationâ€"is defined in this comprehensive new volume that examines the prospects for repairing the damage society has done to the nation's aquatic resources: lakes, rivers and streams, and wetlands. Restoration of Aquatic Ecosystems outlines a national strategy for aquatic restoration, with practical recommendations, and features case studies of aquatic restoration activities around the country. The committee examines: Key concepts and techniques used in restoration. Common factors in successful restoration efforts. Threats to the health of the nation's aquatic ecosystems. Approaches to evaluation before, during, and after a restoration project. The emerging specialties of restoration and landscape ecology.

Author : Matthew M. Bennett
Publisher : John Wiley & Sons
Page : 407 pages
File Size : 50,24 MB
Release : 2011-09-20
Category : Science
ISBN : 1119966698

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The new Second Edition of Glacial Geology provides a modern, comprehensive summary of glacial geology and geomorphology. It is has been thoroughly revised and updated from the original First Edition. This book will appeal to all students interested in the landforms and sediments that make up glacial landscapes. The aim of the book is to outline glacial landforms and sediments and to provide the reader with the tools required to interpret glacial landscapes. It describes how glaciers work and how the processes of glacial erosion and deposition which operate within them are recorded in the glacial landscape. The Second Edition is presented in the same clear and concise format as the First Edition, providing detailed explanations that are not cluttered with unnecessary detail. Additions include a new chapter on Glaciations around the Globe, demonstrating the range of glacial environments present on Earth today and a new chapter on Palaeoglaciology, explaining how glacial landforms and sediments are used in ice-sheet reconstructions. Like the original book, text boxes are used throughout to explain key concepts and to introduce students to case study material from the glacial literature. Newly updated sections on Further Reading are also included at the end of each chapter to point the reader towards key references. The book is illustrated throughout with colour photographs and illustrations.

Author : Jud G. Isebrands
Publisher : CABI
Page : 700 pages
File Size : 12,24 MB
Release : 2014-02-12
Category : Technology & Engineering
ISBN : 1780641087

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Poplars and willows form an important component of forestry and agricultural systems, providing a wide range of wood and non-wood products. This book synthesizes research on poplars and willows, providing a practical worldwide overview and guide to their basic characteristics, cultivation and use, issues, problems and trends. Prominence is given to environmental benefits and the importance of poplar and willow cultivation in meeting the needs of people and communities, sustainable livelihoods, land use and development.