Download or read book Quantifying Channel floodplain Connectivity in the Trinity River TX Using Numerical Modeling and Field Observations written by Shazzadur Rahman (M.S. in Engineering) and published by . This book was released on 2020 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: River-floodplain systems play a fundamental role in fluvial ecosystem preservation, landscape evolution, and for building resilience against natural and anthropogenic modifications. Although floodplains are considered as relatively flat and featureless, high resolution imagery reveal that they are remarkably complex. This realization has led researchers to hypothesize that surface water connectivity can be observed between rivers and their floodplains over a range of discharges. This is contrary to the common belief that floodplains are only connected to the rivers via overbank flow during flooding events. This view of surface water connectivity calls for a reassessment of the physical processes in river-floodplain systems and their implications to landscape evolution. In this study, we focus on the quantification of channel-floodplain connectivity by studying a 23 km long sinuous reach of the lower Trinity River in Texas. This reach transitions from a quasi-normal zone upstream to a backwater-dominated zone downstream. We combine field observations and numerical modeling. High resolution lidar and bathymetric data are used to construct a 2D hydrodynamic model using ANUGA. We use the hydrodynamic model outputs to calculate channel-floodplain connectivity metrics - lateral exchange and residence time. Our initial results show that bidirectional channel-floodplain connectivity exists for a range of river discharges. We also find that this hydrological connectivity is primarily affected by discharge and floodplain vegetation in the form of hydraulic roughness. Sensitivity analyses show that residence time is more sensitive to changes in roughness whereas lateral exchange is more sensitive to changes in discharge
Download or read book River Flow 2020 written by Wim Uijttewaal and published by CRC Press. This book was released on 2020-08-27 with total page 2459 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rivers form one of the lifelines in our society by providing essential services such as availability of fresh water, navigation, energy, ecosystem services, and flood conveyance. Because of this essential role, mankind has interfered continuously in order to benefit most and at the same time avoid adverse consequences such as flood risk and droughts. This has resulted in often highly engineered rivers with a narrow set of functions. In the last decades rivers are increasingly considered in a more holistic manner as a system with a multitude of interdependent processes. River research and engineering has therefore added to the river fundamentals also themes like ecohydraulics, consequences of climate change, and urbanisation. River Flow 2020 contains the contributions presented at the 10th conference on Fluvial Hydraulics, River Flow 2020, organised under the auspices of the Committee on Fluvial Hydraulics of the International Association for Hydro-Environment Engineering and Research (IAHR). What should have been a lively physical gathering of researchers, students and practitioners, was converted into an online event as the COVID-19 pandemic hindered international travelling and large gatherings of people. Nevertheless, the fluvial hydraulics community showed their interest and to be very much alive with a high number of participations for such event. Since its first edition in 2002, in Louvain-la-Neuve, this series of conferences has found a large and loyal audience in the river research and engineering community while being also attractive to the new researchers and young professionals. This is highlighted by the large number of contributions applying for the Coleman award for young researchers, and also by the number of applications and attendants to the Master Classes which are aimed at young researchers and students. River Flow 2020 aims to provide an updated overview of the ongoing research in this wide range of topics, and contains five major themes which are focus of research in the fluvial environment: river fundamentals, the digital river, the healthy river, extreme events and rivers under pressure. Other highlights of River Flow 2020 include the substantial number of interdisciplinary subthemes and sessions of special interest. The contributions will therefore be of interest to academics in hydraulics, hydrology and environmental engineering as well as practitioners that would like to be updated about the newest findings and hot themes in river research and engineering.
Download or read book Quantifying River floodplain Connectivity of the Lower Rio Grande written by Sara Esther Davila and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrological connectivity is the movement of energy and matter between channels to an adjacent floodplain. When there is a hydrological connection between river and floodplain, it is classified as river-floodplain connectivity. Characterizing river-floodplain connectivity can provide useful information for land and flood management, as well as ecological enhancement. The Lower Rio Grande River is controlled by anthropogenic features designed for energy generation, agricultural production, and water diversion for regions like the Rio Grande Valley (RGV), Texas, USA, and the state of Tamaulipas in Mexico. An increase in flood events along the RGV would cause concern over the riverine interactions with the adjacent floodplains during periods of high discharges and/or rainfall. Numerical models can help in this regard by characterizing river-floodplain systems but are often limited by the scarcity of high-resolution topographic data for flat, low-sloped regions like the Lower Rio Grande area. This limitation of data has hindered the development of accurate numerical models of the Lower Rio Grande region as the dynamic nature of extreme weather requires periodic model updates with the most recent topographic, hydrologic, and hydraulic conditions of the Lower Rio Grande region. To improve understanding of river-floodplain connectivity in the Lower Rio Grande River region, this study uses a finite-volume, 2D hydrodynamic model with 1-meter high resolution lidar topographic data to better model river-floodplain connectivity in the Lower Rio Grande in correspondence of discharges over a range of return periods. The numerical model is calibrated and validated using historical data collected at a nearby gage station, and metrics are used to quantify river-floodplain connectivity in the Lower Rio Grande. In particular, we aim to identify what locations along the study domain get inundated during different return period events, and quantify the water depths, residence times, and lateral exchange that are associated with the inundation patterns. These quantification metrics allow us to holistically account for the surface water hydrologic connectivity of the floodplain and determine locations along the domain that experience the most connectivity. We found that high vegetative areas and levees influence river-floodplain interaction by acting as buffers along the floodplain. Oxbow lakes and levees systems are also shown to be inundated in 50% of the return periods analyzed. Additionally, we found that residence times are highest at lower return periods, while lateral exchange are highest at high return periods. This inverse behavior indicates that water can ultimately be transported further into the floodplain during larger storm events, while the lower storms can cause the floodplain to experience longer water retention in the floodplain. With some further improvements, these data can be leveraged to inform local stakeholders about the river interaction with the floodplain and integrated in decision-making tools to ultimately develop management strategies that make river systems more resilient to future climate scenarios
Download or read book Sediment Transport and the Geomorphic Evolution of the Coastal Trinity River TX written by Jasmine Mason and published by . This book was released on 2018 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation uses field observations to understand how changes in sediment transport affect the geomorphic evolution of the coastal Trinity River in Texas. I focus on the main channel of the river along the transition from quasi-uniform flow conditions into gradually varying flow. To begin, I will use elevation data in conjunction with stratigraphic analysis to suggest that scroll bars represent levee deposition along the inner bank of the river channel (Chapter 2). Because their channel-ward edge marks the transition from bed-material transport processes that are associated with the point bar and the proximal overbank deposits of the floodplain, they can be considered the geomorphic edge of the active channel form. Chapters three and four then focus on changes within the active channel through a range of time scales. Separate measurements of inner and outer bank volumetric change and migration show that river banks are capable of migrating independently over short time scales, but migrate compensationally over longer periods. The fifth chapter discusses the observation of a new scale of self-organization in bed topography that occurred along the base of the channel during a historic flood in 2015 (which was captured by the time-lapse lidar used in chapters 3 and 4). Repeat depth surveys show that 12 km long wavelength trains of dunes, spread out over an average of 12 river bends, advected and deformed downstream throughout the 55 day flood. These bedform groups are interpreted as an expression of prolonged washout that occurred over an initially spatially variable bedform field. Remaining questions and suggestions for future research directions are provided in the final chapter. Altogether, this dissertation represents a body of work that spans multiple temporal and spatial scales, and provides the community with a better understanding of how gradually varied flow affects sediment transport and geomorphology. In addition, it provides a foundation for future research that can illuminate important details about fluvial processes in general.
Download or read book River Flow 2020 written by Wim S. J. Uijttewaal and published by CRC Press. This book was released on 2020-08-26 with total page 2422 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rivers form one of the lifelines in our society by providing essential services such as availability of fresh water, navigation, energy, ecosystem services, and flood conveyance. Because of this essential role, mankind has interfered continuously in order to benefit most and at the same time avoid adverse consequences such as flood risk and droughts. This has resulted in often highly engineered rivers with a narrow set of functions. In the last decades rivers are increasingly considered in a more holistic manner as a system with a multitude of interdependent processes. River research and engineering has therefore added to the river fundamentals also themes like ecohydraulics, consequences of climate change, and urbanisation. River Flow 2020 contains the contributions presented at the 10th conference on Fluvial Hydraulics, River Flow 2020, organised under the auspices of the Committee on Fluvial Hydraulics of the International Association for Hydro-Environment Engineering and Research (IAHR). What should have been a lively physical gathering of researchers, students and practitioners, was converted into an online event as the COVID-19 pandemic hindered international travelling and large gatherings of people. Nevertheless, the fluvial hydraulics community showed their interest and to be very much alive with a high number of participations for such event. Since its first edition in 2002, in Louvain-la-Neuve, this series of conferences has found a large and loyal audience in the river research and engineering community while being also attractive to the new researchers and young professionals. This is highlighted by the large number of contributions applying for the Coleman award for young researchers, and also by the number of applications and attendants to the Master Classes which are aimed at young researchers and students. River Flow 2020 aims to provide an updated overview of the ongoing research in this wide range of topics, and contains five major themes which are focus of research in the fluvial environment: river fundamentals, the digital river, the healthy river, extreme events and rivers under pressure. Other highlights of River Flow 2020 include the substantial number of interdisciplinary subthemes and sessions of special interest. The contributions will therefore be of interest to academics in hydraulics, hydrology and environmental engineering as well as practitioners that would like to be updated about the newest findings and hot themes in river research and engineering.
Download or read book Earth Surface Processes Landforms and Sediment Deposits written by John Bridge and published by Cambridge University Press. This book was released on 2008-05 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique, advanced textbook combining sedimentology and geomorphology in a comprehensive and integrated way.
Download or read book Principles of Physical Sedimentology written by J.R.L. Allen and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: apparatus is generally not required for the making of My aim in this book is simple. It is to set out in a logical useful sedimentological experiments. Most of the equip way what I believe is the minimum that the senior undergraduate and beginning postgraduate student in ment needed for those I describe can be found in the kit the Earth sciences should nowadays know of general chen, bathroom or general laboratory , and the materials most often required - sand, clay and flow-marking physics, in order to be able to understand (rather than form merely a descriptive knowledge of) the smaller substances - are cheaply and widely available. As described, the experiments are for the most part purely scale mechanically formed features of detrital sedi ments. In a sense, this new book is a second edition of qualitative, but many can with only little modification my earlier Physical processes of sedimentation (1970), be made the subject of a rewarding quantitative exer which continues to attract readers and purchasers, inas cise. The reader is urged to tryout these experiments much as time has not caused me to change significantly and to think up additional ones. Experimentation the essence of my philosophy about the subject. Time should be as natural an activity and mode of enquiry for has, however, brought many welcome new practitioners a physical sedimentologist as the wielding of spade and hammer.
Download or read book Trinity River written by and published by . This book was released on 1972 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book Thriving on Our Changing Planet written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2019-01-20 with total page 717 pages. Available in PDF, EPUB and Kindle. Book excerpt: We live on a dynamic Earth shaped by both natural processes and the impacts of humans on their environment. It is in our collective interest to observe and understand our planet, and to predict future behavior to the extent possible, in order to effectively manage resources, successfully respond to threats from natural and human-induced environmental change, and capitalize on the opportunities â€" social, economic, security, and more â€" that such knowledge can bring. By continuously monitoring and exploring Earth, developing a deep understanding of its evolving behavior, and characterizing the processes that shape and reshape the environment in which we live, we not only advance knowledge and basic discovery about our planet, but we further develop the foundation upon which benefits to society are built. Thriving on Our Changing Planet presents prioritized science, applications, and observations, along with related strategic and programmatic guidance, to support the U.S. civil space Earth observation program over the coming decade.
Download or read book Texas Aquatic Science written by Rudolph A. Rosen and published by Texas A&M University Press. This book was released on 2014-11-19 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: This classroom resource provides clear, concise scientific information in an understandable and enjoyable way about water and aquatic life. Spanning the hydrologic cycle from rain to watersheds, aquifers to springs, rivers to estuaries, ample illustrations promote understanding of important concepts and clarify major ideas. Aquatic science is covered comprehensively, with relevant principles of chemistry, physics, geology, geography, ecology, and biology included throughout the text. Emphasizing water sustainability and conservation, the book tells us what we can do personally to conserve for the future and presents job and volunteer opportunities in the hope that some students will pursue careers in aquatic science. Texas Aquatic Science, originally developed as part of a multi-faceted education project for middle and high school students, can also be used at the college level for non-science majors, in the home-school environment, and by anyone who educates kids about nature and water. To learn more about The Meadows Center for Water and the Environment, sponsors of this book's series, please click here.
Download or read book Groundwater surface Water Interaction written by Corinna Abesser and published by . This book was released on 2008 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selected papers from a symposium on A new Focus on Integrated Analysis of Groundwater-Surface Water Systems, held during the International Union of Geodesy and Geophysics XXIV General Assembly in Perugia, Italy, 11-13 July 2007.
Download or read book Texas Riparian Areas written by Nicole A. Davis and published by Texas A&M University Press. This book was released on 2014-01-29 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: Riparian areas—transitional zones between the aquatic environments of streams, rivers, and lakes and the terrestrial environments on and alongside their banks—are special places. They provide almost two hundred thousand miles of connections through which the waters of Texas flow. Keeping the water flowing, in as natural a way as possible, is key to the careful and wise management of the state’s water resources. Texas Riparian Areas evolved from a report commissioned by the Texas Water Development Board as Texas faced the reality of over-allocated water resources and long-term if not permanent drought conditions. Its purpose was to summarize the characteristics of riparian areas and to develop a common vocabulary for discussing, studying, and managing them. To learn more about The Meadows Center for Water and the Environment, sponsors of this book's series, please click here.
Download or read book Scientific Investigations Report written by Sharon E. Kroening and published by . This book was released on 2004 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fluvial Meanders and Their Sedimentary Products in the Rock Record IAS SP 48 written by Massimiliano Ghinassi and published by John Wiley & Sons. This book was released on 2019-01-22 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: The sinuous form and peculiar evolution of meandering rivers has long captured the imagination of people. Today, meandering rivers exist in some of the most densely populated areas in the World, where they provide environmental and economic wealth and opportunities, as well as posing hazards. Through geological time, the ancestors of these modern meanders built deposits that are now host to mineral resources, groundwater, and hydrocarbons. This Special Publication illustrates the breadth of current research on meandering rivers and their deposits. The collection of research papers demonstrates the state of science on fluvial process–product relationships. The articles cover fundamental and applied studies of both modern and ancient rivers, are based on state-of-the-art technology, include complementary philosophical approaches, and span a wide range of spatial and temporal scales. This book includes some of the most recent advances in the study of the morphodynamics and sedimentology of meandering rivers, and is an important resource for those who want to investigate fluvial systems and their deposits.
Download or read book The Fishes of Tennessee written by David A. Etnier and published by . This book was released on 1993 with total page 681 pages. Available in PDF, EPUB and Kindle. Book excerpt: The waters of Tennessee are home to about three hundred species of fishes, the most diverse collection of freshwater fauna of any state in the country. This readable and authoritative book, first published in 1993, examines that diversity within the state's complex natural history. It not only synthesizes a wealth of scientific information but also presents a tremendous amount of original research. Species accounts provide information on the classification, identification, biology, distribution, taxonomy, and current status of Tennessee's fishes -- many of which are endangered. Taxonomic keys provide readers with guides for distinguishing species. Extensive use is made of high-quality photographs, range maps, and drawings. For this second printing, the authors have provided corrections and updated information. This data includes seven new species accounts and new distributional information.
Download or read book Government Reports Annual Index written by and published by . This book was released on 1992 with total page 1400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
