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Sediment Retention On A Deltaic Floodplain In Response To Climate And Land Use Changes
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Book Synopsis Sediment Retention on a Deltaic Floodplain in Response to Climate and Land-use Changes by : Steven Matthew Winter
Download or read book Sediment Retention on a Deltaic Floodplain in Response to Climate and Land-use Changes written by Steven Matthew Winter and published by . This book was released on 2003 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sediment Mobilization From Streambank Failures by : Jody J. Stryker
Download or read book Sediment Mobilization From Streambank Failures written by Jody J. Stryker and published by . This book was released on 2017 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research incorporates streambank erosion and failure processes into a distributed watershed model and evaluates the impacts of climate change on the processes driving streambank sediment mobilization at a watershed scale. Excess sediment and nutrient loading are major water quality concerns for streams and receiving waters. Previous work has established that in addition to surface and road erosion, streambank erosion and failure are primary mechanisms that mobilize sediment and nutrients from the landscape. This mechanism and other hydrological processes driving sediment and nutrient transport are likely to be highly influenced by anticipated changes in climate, particularly extreme precipitation and flow events. This research has two primary goals: to develop a physics-based watershed model with more inclusive representation of sediment by including simulation of streambank erosion and geotechnical failure; and to investigate the impacts of climate change on unstable streams and suspended sediment mobilization by overland erosion, erosion of roads, and the erosion as well as failure of streambanks. This advances mechanistic simulation of suspended sediment mobilization and transport from watersheds, which is particularly valuable for investigating the impacts of climate and land use changes, as well as extreme events. Model development involved coupling two existing physics-based models: the Bank Stability and Toe Erosion Model (BSTEM) and the Distributed Hydrology Soil Vegetation Model (DHSVM). This approach simulates streambank erosion and failure in a spatially explicit environment. The coupled model is applied to the Mad River watershed in central Vermont as a test case. I then use the calibrated Mad River model to predict the response in watershed sediment loading to future climate scenarios that specifically represent local temperature and precipitation trends for the northeastern US, particularly changing trends in the frequency and magnitude of extreme precipitation. Overall the streambank erosion and failure processes are captured in the coupled model approach. Although the presented calibration of the model underestimates suspended sediment concentrations resulting from relatively small storm/flow events, it still improves prediction of cumulative loads and in some cases suspended sediment concentrations during elevated flow events in comparison to model results without including BSTEM. Increases in temperature affect the timing and magnitude of snow melt and spring flows, as well as associated sediment mobilization, in the watershed. Increases in annual precipitation and in extreme precipitation events produce increases in annual as well as peak discharge and sediment loads in the watershed. This research adds to the body of evidence indicating that streambank erosion and failure can be a major source of suspended sediment, and thereby a major source of phosphorus as well. It also shows that local climate trends in the Northeast are likely to result in higher peak discharges and sediment yields from meso-scale, high-gradient watersheds that encompass headwater forested streams and agricultural floodplains. One limitation was that we could not drive the model with meteorological data that represented changes in both temperature and precipitation, highlighting the need for improved climate predictions. This coupled model approach could be parameterized for alternative watersheds and be re-applied to answer various questions related to erosion processes and sediment transport in a watershed. These findings have important implications for resource allocation and targeted watershed management strategies.
Book Synopsis Storage Time Dynamics of Meandering River Floodplain Sediments by : Tobias Raphael Hasse
Download or read book Storage Time Dynamics of Meandering River Floodplain Sediments written by Tobias Raphael Hasse and published by . This book was released on 2022 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using numerical simulations of meandering rivers and adjacent sediments, I develop new length, velocity, and time scales based on planform dynamics of meandering rivers, allowing researchers to estimate the storage time of sediments in the absence of simulation or geochronologic measurements. I derive an equation which fits the sediment storage time distribution remarkably well and combines aspects of an exponential distribution with a truncated Pareto distribution. The truncation of the Pareto distribution is obscured if the oldest few percent of sediments are omitted. Storage time distributions have heavier tails in wider valleys. Storage time distributions are not at steady state: a) because the timescale to reach steady state in a broad floodplain exceeds the land use or climate timescale of constant external forcing, and b) due to heterogeneity in alluvial deposit ages and removal, even in a simulation under constant forcing conditions. Median storage times range from 330 to 750 years with an average of 497 years, while mean storage times (residence times) range from 540 to 20,300 years with an average of 2,490 years. 'Flood' deposits (deposited on top of point bars) are stored 1.2-2x longer than point bar deposits. The highest fraction (5.7%) of eroding point bar sediment has been stored for 90 years which is how long it takes for the channel to migrate 2.5 channel widths. There is significant variability in storage time distributions: Correlations between the median storage times decreases quickly through time, for distributions 180 years apart R2 is only 0.5. Most of the time, the oldest eroding sediment is younger than 10 kyr; occasionally, 20% of eroding sediment is older than 25 kyr. Flood deposits have less variability and preserve significantly more temporal signal than point bar deposits, but older deposits of both types are rarely included in the 'sampled' eroding sediment. Visually apparent patterns in the graphical presentation of the distributions suggest that variability is occurring at longer time scales than individual bend dynamics. Storage time distributions of sediment eroded today are poor estimates for the eventual storage time distribution of sediment deposited today.
Book Synopsis Upper Truckee River Restoration and Golf Course Reconfiguration Project by :
Download or read book Upper Truckee River Restoration and Golf Course Reconfiguration Project written by and published by . This book was released on 2011 with total page 794 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Intergovernmental Panel on Climate Change (IPCC) Publisher :Cambridge University Press ISBN 13 :9781009157971 Total Pages :755 pages Book Rating :4.1/5 (579 download)
Book Synopsis The Ocean and Cryosphere in a Changing Climate by : Intergovernmental Panel on Climate Change (IPCC)
Download or read book The Ocean and Cryosphere in a Changing Climate written by Intergovernmental Panel on Climate Change (IPCC) and published by Cambridge University Press. This book was released on 2022-04-30 with total page 755 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Intergovernmental Panel on Climate Change (IPCC) is the leading international body for assessing the science related to climate change. It provides policymakers with regular assessments of the scientific basis of human-induced climate change, its impacts and future risks, and options for adaptation and mitigation. This IPCC Special Report on the Ocean and Cryosphere in a Changing Climate is the most comprehensive and up-to-date assessment of the observed and projected changes to the ocean and cryosphere and their associated impacts and risks, with a focus on resilience, risk management response options, and adaptation measures, considering both their potential and limitations. It brings together knowledge on physical and biogeochemical changes, the interplay with ecosystem changes, and the implications for human communities. It serves policymakers, decision makers, stakeholders, and all interested parties with unbiased, up-to-date, policy-relevant information. This title is also available as Open Access on Cambridge Core.
Book Synopsis Flooding and Management of Large Fluvial Lowlands by : Paul F. Hudson
Download or read book Flooding and Management of Large Fluvial Lowlands written by Paul F. Hudson and published by Cambridge University Press. This book was released on 2021-11-25 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examines interrelations between flood management, flooding, and environmental change, for advanced students, researchers, and practitioners.
Book Synopsis The Impact of Global Change on Erosion and Sediment Transport by Rivers by : Desmond E. Walling
Download or read book The Impact of Global Change on Erosion and Sediment Transport by Rivers written by Desmond E. Walling and published by UNESCO. This book was released on 2009 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biogeochemical Dynamics at Major River-Coastal Interfaces by : Thomas Bianchi
Download or read book Biogeochemical Dynamics at Major River-Coastal Interfaces written by Thomas Bianchi and published by Cambridge University Press. This book was released on 2014 with total page 673 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive, state-of-the-art synthesis of biogeochemical dynamics and the impact of human alterations at major river-coastal interfaces for advanced students and researchers.
Book Synopsis Global Change and Integrated Coastal Management by : Nick Harvey
Download or read book Global Change and Integrated Coastal Management written by Nick Harvey and published by Springer Science & Business Media. This book was released on 2007-05-31 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most of the world’s population lives close to the coast and is highly dependent on coastal resources, which are being exploited at unsustainable rates. These resources are being subject to further pressures associated with population increase and the globalization of coastal resource demand. This is particularly so for the Asia-Pacific region which contains almost two thirds of the world’s population and most of the world’s coastal megacities. The region has globally important atmospheric and oceanic phenomena, which affect world climate such as the Asian Monsoon and the El-Niño Southern Oscillation phenomena. The Asia-Pacific region also has highly significant marine diversity but over the last few decades, coastal resources such as mangroves, coral reefs and fisheries have experienced large-scale depletion. The need to find appropriate management solutions to these and other coastal issues is made more complex by the need to take account of international scientific predictions for global climate change and sea-level rise which will further impact on these coasts. The idea for this book arose from a meeting of coastal scientists in Kobe, Japan in May 2003. The meeting was organized by the Asia-Pacific Network for Global Change Research (APN), an inter-governmental network, comprising 21 member countries, for the promotion of global change research and links between science and policy making in the region.
Book Synopsis Tidal Freshwater Wetlands by : Aat Barendregt
Download or read book Tidal Freshwater Wetlands written by Aat Barendregt and published by . This book was released on 2009 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sea-Level Rise for the Coasts of California, Oregon, and Washington by : National Research Council
Download or read book Sea-Level Rise for the Coasts of California, Oregon, and Washington written by National Research Council and published by National Academies Press. This book was released on 2012-12-06 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tide gauges show that global sea level has risen about 7 inches during the 20th century, and recent satellite data show that the rate of sea-level rise is accelerating. As Earth warms, sea levels are rising mainly because ocean water expands as it warms; and water from melting glaciers and ice sheets is flowing into the ocean. Sea-level rise poses enormous risks to the valuable infrastructure, development, and wetlands that line much of the 1,600 mile shoreline of California, Oregon, and Washington. As those states seek to incorporate projections of sea-level rise into coastal planning, they asked the National Research Council to make independent projections of sea-level rise along their coasts for the years 2030, 2050, and 2100, taking into account regional factors that affect sea level. Sea-Level Rise for the Coasts of California, Oregon, and Washington: Past, Present, and Future explains that sea level along the U.S. west coast is affected by a number of factors. These include: climate patterns such as the El Niño, effects from the melting of modern and ancient ice sheets, and geologic processes, such as plate tectonics. Regional projections for California, Oregon, and Washington show a sharp distinction at Cape Mendocino in northern California. South of that point, sea-level rise is expected to be very close to global projections. However, projections are lower north of Cape Mendocino because the land is being pushed upward as the ocean plate moves under the continental plate along the Cascadia Subduction Zone. However, an earthquake magnitude 8 or larger, which occurs in the region every few hundred to 1,000 years, would cause the land to drop and sea level to suddenly rise.
Book Synopsis Wetland Carbon and Environmental Management by : Ken W. Krauss
Download or read book Wetland Carbon and Environmental Management written by Ken W. Krauss and published by John Wiley & Sons. This book was released on 2021-11-23 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explores how the management of wetlands can influence carbon storage and fluxes. Wetlands are vital natural assets, including their ability to take-up atmospheric carbon and restrict subsequent carbon loss to facilitate long-term storage. They can be deliberately managed to provide a natural solution to mitigate climate change, as well as to help offset direct losses of wetlands from various land-use changes and natural drivers. Wetland Carbon and Environmental Management presents a collection of wetland research studies from around the world to demonstrate how environmental management can improve carbon sequestration while enhancing wetland health and function. Volume highlights include: Overview of carbon storage in the landscape Introduction to wetland management practices Comparisons of natural, managed, and converted wetlands Impact of wetland management on carbon storage or loss Techniques for scientific assessment of wetland carbon processes Case studies covering tropical, coastal, inland, and northern wetlands Primer for carbon offset trading programs and how wetlands might contribute The American Geophysical Union promotes discovery in Earth and space science for the benefit of humanity.Its publications disseminate scientific knowledge and provide resources for researchers, students, and professionals.
Book Synopsis Trials and Tribulations of Life on an Active Subduction Zone: by : Shahin Dashtgard
Download or read book Trials and Tribulations of Life on an Active Subduction Zone: written by Shahin Dashtgard and published by Geological Society of America. This book was released on 2014-10-01 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Nine field guides explore diverse topics such as urban geology and geoheritage in Metro Vancouver, the processes and postglacial adjustments of the Cordilleran Ice Sheet, and human interaction and adaptation to geological and climate changes in British Columbia"--
Book Synopsis Riparian Areas by : National Research Council
Download or read book Riparian Areas written by National Research Council and published by National Academies Press. This book was released on 2002-10-10 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis The Mekong Delta System by : Fabrice G. Renaud
Download or read book The Mekong Delta System written by Fabrice G. Renaud and published by Springer Science & Business Media. This book was released on 2012-06-01 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book about the Mekong Delta presents a unique collection of state-of-the-art contributions by international experts from different scientific disciplines about the characteristics and pressing water-related challenges of the Mekong Delta in Vietnam. The Mekong Delta belongs to one of the areas, which are to expect the largest challenges concerning environmental change and climate change induced sea level rise . The Delta acts as the “rice bowl” of Southeast Asia and is home to over 17 Million people, who need to cope with ecologic as well as socio-economic changes linked to the rapid economic development of the country. Annual floods, severe droughts, salt water intrusion, degrading water quality, tropical cyclones, hydrologic changes due to hydropower projects in the upstream of the Mekong, coastal erosion, and the loss of biodiversity are some of the problems in the region. Heterogeneous resource management responsibilities, and the fact that the Mekong – and thus also the Delta – is influenced by six countries aggravate the situation. Integrated water resources management and fostered cooperation and information exchange are pressing needs for the sustainable development of the Delta.
Book Synopsis Advancing the Science of Climate Change by : National Research Council
Download or read book Advancing the Science of Climate Change written by National Research Council and published by National Academies Press. This book was released on 2011-01-10 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: Climate change is occurring, is caused largely by human activities, and poses significant risks for-and in many cases is already affecting-a broad range of human and natural systems. The compelling case for these conclusions is provided in Advancing the Science of Climate Change, part of a congressionally requested suite of studies known as America's Climate Choices. While noting that there is always more to learn and that the scientific process is never closed, the book shows that hypotheses about climate change are supported by multiple lines of evidence and have stood firm in the face of serious debate and careful evaluation of alternative explanations. As decision makers respond to these risks, the nation's scientific enterprise can contribute through research that improves understanding of the causes and consequences of climate change and also is useful to decision makers at the local, regional, national, and international levels. The book identifies decisions being made in 12 sectors, ranging from agriculture to transportation, to identify decisions being made in response to climate change. Advancing the Science of Climate Change calls for a single federal entity or program to coordinate a national, multidisciplinary research effort aimed at improving both understanding and responses to climate change. Seven cross-cutting research themes are identified to support this scientific enterprise. In addition, leaders of federal climate research should redouble efforts to deploy a comprehensive climate observing system, improve climate models and other analytical tools, invest in human capital, and improve linkages between research and decisions by forming partnerships with action-oriented programs.
