Download or read book Hydrogeology and Deformation of Sandbars in Response to Fluctuations in Flow of the Colorado River in the Grand Canyon Arizona written by and published by . This book was released on 1995 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Water resources Investigations Report written by and published by . This book was released on 1995 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Water level Fluctuations Water Temperatures and Tilts in Sandbars 6 5R 43 1L and 172 3L Grand Canyon Arizona 1990 93 written by Michael C. Carpenter and published by . This book was released on 1995 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Eddy Bar Responses to the Sediment Dynamics of Pool riffle Environments written by Brian L. Cluer and published by . This book was released on 1997 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1995 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1995 with total page 866 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rivers Over Rock written by Keith J. Tinkler and published by American Geophysical Union. This book was released on 1998-02-04 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 107. Bedrock river channels are sites of primary erosion in the landscape, fixing the baselevel for all points upstream. This volume provides for the first time an integrated view of the characteristics and operation of this important, though hitherto neglected, class of channels. Examples are provided from several continents and cover a wide range of spatial scales from the large river basins (such as the Colorado River in the United States and the Indus River in Pakistan) down to reach scales and individual sites. Likewise the geologic timescales considered range from erosion and transportation during individual flows to accumulated effects over periods of tens of millions of years.

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 1995 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Publications of the Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1995 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reconnaissance Investigation of Water Quality written by S. S. Embrey, E. K. Block and published by . This book was released on 1995 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Publications of the Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1995 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Turbulence Sediment Transport Erosion and Sandbar Beach Failure Processes in Grand Canyon written by Laura Verónica Alvarez Rueda and published by . This book was released on 2015 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research examines lateral separation zones and sand bar slope stability using two methods: a parallelized turbulence resolving model and full-scale laboratory experiments. Lateral flow separation occurs in rivers where banks exhibit strong curvature, for instance canyon rivers, sharp meanders and river confluences. In the Colorado River, downstream Glen Canyon Dam, lateral separation zones are the principal storage of sandbars. Maximum ramp rates have been imposed to Glen Canyon Dam operation to minimize mass loss of sandbars. Assessment of the effect of restricting maximum ramp rates in bar stability is conducted using multiple laboratory experiments. Results reveal that steep sandbar faces would rapidly erode by mass failure and seepage erosion to stable slopes, regardless of dam discharge ramp rates. Thus, continued erosion of sand bars depends primarily of turbulent flow and waves. A parallelized, three-dimensional, turbulence resolving model is developed to study flow structures in two lateral separation zones located along the Colorado River in Grand Canyon. The model employs a Detached Eddy Simulation (DES) technique where variables larger than the grid scale are fully resolved, while Sub-Grid-Scale (SGS) variables are modeled. The DES-3D model is validated using ADCP flow measurements and skill metric scores show predictive capabilities of simulated flow. The model reproduces the patterns and magnitudes of flow velocity in lateral recirculation zones, including size and position of primary and secondary eddy cells and return current. Turbulence structures with a predominately vertical axis of vorticity are observed in the shear layer, becoming three-dimensional without preferred orientation downstream. The DES-3D model is coupled with a sediment advection-diffusion formulation, wherein advection is provided by the DES velocity field minus particles settling velocity, and diffusion is provided by the SGS. Results show a lateral recirculation zone having a continuous export and import of sediment from and to the main channel following a pattern of high frequency pulsations of positive deposition fluxes. These high frequency pulsations play an important role to prevent an oversupply of sediment within the lateral separation zones. Improved predictive capabilities are achieved with this model when compared with previous two- and three-dimensional quasi steady and steady models.

Download or read book Climate related Crustal Loading Deformation Around Lake Mead Nevada Arizona USA written by Esther Omotayo Oyedele and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lake Mead--the most prominent U.S. reservoir by volume--has been facing the effects of a devastating prolonged drought since 1999, which caused the lake water levels to plummet. The crust around Lake Mead has been uplifting due to an unloading effect of the current drought in the western USA. This research analyzed the crustal deformation due to elastic loading and unloading caused by climate-related water mass variation in Lake Mead over the last decade. The Global Navigation Satellite System (GNSS) measures elastic loading deformation responses to hydrological mass variations near or on the Earth's surfaces. GNSS has been used as an independent measurement to distinguish between hydrological models. This research systematically studied the Correlation between water level changes and crustal deformation around Lake Mead using data from the space geodetic technique GNSS. Other loading impacts, such as atmosphere and non-tidal ocean loading effects, were modeled and removed to study the lake-water-induced loading displacement. My result showed that the modeled elastic loading deformation is generally consistent with GNSS observations in the vertical component but usually smaller than GNSS observations in the horizontal directions, indicating the potential missing hydrological water components in the Model. This study further investigated the impacts of variations of other water loads, such as regional soil moisture and local groundwater. To compare the modeled loading deformation with GNSS observations, I calculated the correlation coefficients (r). Among all the six sites, the comparison for the sites P006 and NVLM indicated a strong correlation between observed surface deformation and modeled surface deformation from soil moisture and lake loading. After subtracting the modeled loading deformation from the corrected GNSS observations, I also discussed the Correlation between the residual series and the local groundwater level change around Lake Mead. I primarily studied the seasonal variations of the groundwater and GNSS residual series after removing loading deformation, which indicates a poroelastic response of the Earth's surface to subsurface groundwater change.

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.

Download or read book Open file Report written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Marine Clastic Reservoirs written by E.G. Rhodes and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: An integrated perspective to sandstone reservoir description and analysis. The twelve chapters, divided in 3 sections, describe the use of sequence stratigraphy to catalog, identify and predict marine clastic reservoir facies, examine importance of rigorous sedimentological and geomorphic description, and review marine depositional environments.