Download or read book Spatial and Temporal Distribution of Fine Particles and Elemental Concentrations in Suspended Sediements i e Sediments in Lake Tahoe Streams California Nevada written by Alexander A. Rabidoux and published by . This book was released on 2005 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Distribution of Suspended Particulate Matter Off the California Coast from San Francisco Bay to Cape San Mart n written by Lawrence Florian Diddlemeyer and published by . This book was released on 1975 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: The distribution of suspended particulate matter in the 1.4 to 27.9 micron range based on data gathered during four cruises off the California coast from San Francisco Bay to Cape San Martin is presented by means of isometric drawings as well as more conventional graphs. It was observed that pycnoclines set up particle 'traps'. In areas where a deep mixed layer existed particle concentrations were randomly distributed in the layer. Counts of larger sized particles decreased with depth; those for smaller particles appeared to remain about constant throughout the water column. Particle sizes and distributions reflected bottom topography and water depth. Shallow water stations exhibited higher particle concentrations, while stations over Monterey Canyon showed depressed counts over the entire size range. In localized upwelling areas higher concentrations around the areas' peripheries than in their centers were found. C values generally occurred in the 2.4 to 3.1 range, but significant deviations were noted during upwelling. K values often fell in the 50 to 300 x 103 particles/m1 range, but extremely high values were noted for the Davidson Current period. Phytoplankton blooms appeared to be responsible for 'knees' or 'peaks' in many of the size distributions.
Download or read book Elemental Composition of Suspended Particulate Matter in the Lower Duwamish River and Elliott Bay Washington written by Gary J. Massoth and published by . This book was released on 1982 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sampling Surface and Subsurface Particle size Distributions in Wadable Gravel and Cobble bed Streams for Analyses in Sediment Transport Hydraulics and Streambed Monitoring written by Kristin Bunte and published by . This book was released on 2001 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document provides guidance for sampling surface and subsurface sediment from wadable gravel-and cobble-bed streams. After a short introduction to streams types and classifications in gravel-bed rivers, the document explains the field and laboratory measurement of particle sizes and the statistical analysis of particle-size distributions. Analysis of particle parameters, including shape, density, and bulk density are also discussed. The document describes the spatial variability of bed-material particle sizes as well as the horizontal and vertical structure of particle deposits. The discussion of sampling procedures and equipment helps the user to make appropriate selections that support the sampling objective. Sample-size estimates may be obtained from empirical data or computed from statistical relationships between sample size and accuracy. The document explains a variety of methods, their usage and prerequisites. A detailed discussion of sampling schemes guides the user to select appropriate spatial sampling patterns necessary to produce representative samples.
Download or read book Exchange Flows Between the Tahoe Keys Embayments and Lake Tahoe California Nevada written by Alexa C. La Plante and published by ProQuest. This book was released on 2008 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semi-enclosed lacustrine embayments connected to large lakes can have significant affects on littoral zone and basin-wide limnological processes. Exchange flow between a semi-enclosed embayment and a large lake can transport water quality constituents to and from the embayment and the nearby littoral zone of a lake. In this research, channel exchange between a large lake and two semi-enclosed embayments was investigated. Baroclinic (density-driven flow) and barotropic (pressure-driven flow) forces were evaluated as mechanisms of channel exchange. Basin residence times were estimated to approximate the time-scale at which channel exchange occurs within each basin. Research was conducted at two heavily utilized semi-enclosed embayments, the Tahoe Keys Marina and Tahoe Keys Property Owners Association (Tahoe Keys), located at the southern end of Lake Tahoe (California-Nevada). Lake Tahoe, historically recognized for its oligotrophic status and exceptionally clear blue water, has experienced a notable decline in water quality since the 1960s. Key factors affecting lake water quality include increased sediment loads from erosion, runoff and stream inflows carrying fine sediment, excessive algal growth, and a rise in invasive plant and fish species. Many of these factors originate and are most apparent in nearshore areas of the lake. Although extensive research has been done to identify factors affecting the water quality of Lake Tahoe, little investigation has been done on the effects of small embayments located along the periphery of the lake. Channel exchange between the Tahoe Keys and Lake Tahoe was evaluated using data on channel flow velocity and direction, temperature distribution along the water column, basic water quality and biological parameters, and meteorology during a 15-month period from May 2006 and October 2007. Results indicate that spatial and temporal trends in thermal (i.e. density) stratification (baroclinic forcing) are linked to bi-layer exchange flows during most months of the year. Although the data did not reveal a strong relationship between barotropic forces and channel exchange, it is possible that barotropic forces are masked by dominant baroclinic forces. The mean residence time within the area of active exchange at both embayments was estimated to be between 2-4 days during baroclinic channel exchange.
Download or read book Rates of Sediment Production in Southwestern United States written by Carl Barrier Brown and published by . This book was released on 1945 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Seventh Federal Interagency Sedimentation Conference March 25 29 2001 Reno Nevada USA written by and published by . This book was released on 2001 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Deposition of Fine Sediments in Turbulent Flows written by Emmanuel Partheniades and published by . This book was released on 1971 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deposition of fine cohesive sediments in a turbulent flow field was studied in a system of a rotating annular channel and ring. The percentage of the total sediment that a given flow can maintain in suspension depends only on the bed shear stress and is independent of the initial sediment concentration. The percentage (C) of the depositable sediment deposited at time t has been found to vary with time according to the law (C = alpha logt + beta), where the coefficient a is independent of the flow conditions and sediment concentration, while the coefficient b is a function of the bed shear stress only. Both a and b depend on the physiochemical properties of the sediment and the water environment. Deposition rates are proportional to the depositable sediment concentration and inversely proportional to time.
Download or read book Sediment Transport Data and Related Information for Selected Coarse bed Streams and Rivers in Idaho written by and published by . This book was released on 2004 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report and associated web site files provide sediment transport and related data for coarse-bed streams and rivers to potential users. Information on bedload and suspended sediment transport, streamflow, channel geometry, channel bed material, floodplain material, and large particle transport is provided for 33 study reaches in Idaho that represent a wide range of drainage areas, average annual streamflows, channel gradients, and substrate sizes. All the study reaches have a coarser layer of surface bed material overlaying finer subsurface material. Both bedload and suspended sediment transport increase with discharge and the relationship can be reasonably represented using a log-log model. At most sites, the suspended load makes up the majority of the total sediment load. The size of the largest bedload particle in transport and usually the median size of the bedload increase with discharge. However, the median size of the bedload is much smaller than the channel surface material and sand is the primary or a large component of the bedload material. A large proportion of the annual sediment production occurs at the higher streamflows during snowmelt. On average, discharges equal to or larger than bankfull occur 3.3 percent of the time and transport 61.5 percent of the annual bedload sediment. Discharges less than the average annual discharge, on average, occur 75.0 percent of the time and transport about 3.8 percent of the annual bedload sediment.
Download or read book Notes on Sedimentation Activities written by and published by . This book was released on 1971 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Interactions Between Sediments and Water written by R. Douglas Evans and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acknowledgements Conference Summary R. D. EVANS, A. PROVINI, J. S. MATIICE, B. T. HART and J. WISNIEWSKI/Interactions Between Sediments and Water: Summary of the 7th International Symposium 1-7 Sediment I Water Dynamics D. E. WALLING and W. HE /Investigating Spatial Patterns of Overbank Sedimentation on River Floodplains 9-20 R. JEPSEN, J. ROBERTS and W. LICK / Effects of Bulk Density on Sediment Erosion Rates 21-31 T. G. MILLIGAN and D. H. LORING / The Effect of Flocculation on the Size Distributions of Bottom Sediment in Coastal Inlets: Implications for Contaminant Transport 33-42 loG. DROPPO, G. G. LEPPARD, D. T. FLANNIGAN and S. N. LlSS / The Freshwater Floc: A Functional Relationship of Water and Organic and Inorganic Floc Constituents Affecting Suspended Sediment Properties 43-53 C. H. TSAI and J. Q. HU / Flocculation of Particles by Fluid Shear in Buffered Suspensions 55-62 P. M. STONE and D. E. WALLING / Particle Size Selectivity Considerations in Suspended Sediment Budget Investigations 63-70 Q. HE and D. E. WALLING / Spatial Variability of the Particle Size Composition of Overbank Floodplain Deposits 71-80 C. YEN and Y. LIN KEY / Variations of Bed Surface Sediment Size in a Channel Bend 81-88 M. STONE and B. G. KRISHNAPPAN / Transport Characteristics of Tile-Drain Sediments From an Agricultural Watershed 89-103 U. KERN and B. WESTRICH / Sediment Budget Analysis for River Reservoirs 105-112 A. I. PACKMAN, N. H. BROOKS and J. J.
Download or read book Sediment Water Interactions written by B.T. Hart and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 733 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers appearing in this volume reflect the current attention in sediment/water science to five main topics of investigation: Sediment dynamics in estuaries, coastal waters, lakes, reservoirs and rivers; Sediment-associated biological processes; Contaminant accumulation, distribution and geochemistry; Fluxes from sediments; and Element cycling. Contributors address sediment/water interactions related to both fresh and salt water conditions.
Download or read book The Use of Suspended Sediment and Associated Trace Elements in Water Quality Studies written by Arthur J. Horowitz and published by . This book was released on 1995 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of Methods Used in Measurement and Analysis of Sediment Loads in Streams written by and published by . This book was released on 1941 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sediments written by Renato Baudo and published by CRC Press. This book was released on 1990-08-27 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: This important volume-the product of a meeting of a select group of scientists-provides the most recent research results from the world's leaders in the study of toxic pollutants in sediments. It gives practical information on measuring and mapping distributions of concentrations of pollutants and their toxic effects in sediments. Also covered are the use and relative advantages and disadvantages of benthic chambers, sedimentation traps, box corers, "peepers" and other sampling techniques in sediment research and assessment. Important topics covered include: bioassay, elemental speciation, diffuse source problems, nutrient flux, biomethylation, bioavailability, and toxicity assessment. Will help in assessment and monitoring of chemistry, dynamics, bioavailability, and toxicity of pollutants, as well helping to chart courses for remedial action. This book will be of interest to anyone interested in the processes controlling the chemistry and movement of pollutants in sediments, especially: limnologists aquatic toxicologists engineers lake managers ecologists biologists environmental chemists
Download or read book Estuarine Cohesive Sediment Dynamics written by Ashish J. Mehta and published by Springer Science & Business Media. This book was released on 2013-03-07 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: The background for the Workshop on Cohesive Sediment Dynamics - . !!!!!. Special Reference to Physical Processes in Estuaries is briefly outlined in Chapter I. Here I wish to acknowledge those whose support I consider to be pivotal to this under taking. My deepest appreciation goes to Cynthia Vey, whose organizational skills and dedicated effort made the completion of this volume possible. Thanks are also due to Gail Terry for workshop organization, Jean Branson for word processing and Lillean Pieter for helping with drawings. Finally, I must express my sincere appreciation to Arthur Ezra 9f the National Science Foundation for providing support (through Grant No. CEE-8401185) for the workshop, and to Hsiang Wang for depart mental encouragement. With deepest regret, I must note the untimely death of Ranjan Ariathurai, 39, on June 5, 1985, before this volume could be published. He was a guiding force to many within the small group of researchers in cohesive sediment dynamics, and his professional brilliance and inspirational personal qualities constituted the true spirit . behind the workshop. I trust this volume will serve, albeit in a small way, as a fitting memory to this spirit, and to the remarkable professional contributions Ranjan made during his short career. Professor Ray B. Krone Professor Emmanuel Partheniades Department of Civil Engineering Department of Engineering Sciences University of California University of Florida Davis, California Gainesville, Florida TABLE OF CONTENTS CHAPTER PAGE I. INTRODUCTION Ashish J. Mehta •••••••••••••••••••••••••••••••••••••••••••••••••••• 1 II.
Download or read book Application of Geochemical Tracers to Fluvial Sediment written by Jerry R. Miller and published by Springer. This book was released on 2014-12-03 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book takes an in-depth look at the theory and methods inherent in the tracing of riverine sediments. Examined tracers include multi-elemental concentration data, fallout radionuclides (e.g., 210Pb, 137Cs, 7Be), radiogenic isotopes (particularly those of Pb, Sr, and Nd), and novel (“non-traditional”) stable isotopes (e.g., Cd, Cu, Hg, and Zn), the latter of which owe their application to recent advances in analytical chemistry. The intended goal is not to replace more ‘traditional’ analyses of the riverine sediment system, but to show how tracer/fingerprinting studies can be used to gain insights into system functions that would not otherwise be possible. The text, then, provides researchers and catchment managers with a summary of the strengths and limitations of the examined techniques in terms of their temporal and spatial resolution, data requirements, and the uncertainties in the generated results. The use of environmental tracers has increased significantly during the past decade because it has become clear that documentation of sediment and sediment-associated contaminant provenance and dispersal is essential to mitigate their potentially harmful effects on aquatic ecosystems. Moreover, the use of monitoring programs to determine the source of sediments to a water body has proven to be a costly, labor intensive, long-term process with a spatial resolution that is limited by the number of monitoring sites that can be effectively maintained. Alternative approaches, including the identification and analysis of eroded upland areas and the use of distributed modeling routines also have proven problematic. The application of tracers within riverine environments has evolved such that they focus on sediments from two general sources: upland areas and specific, localized, anthropogenic point sources. Of particular importance to the former is the development of geochemical fingerprinting methods that quantify sediment provenance (and to a much lesser degree, sediment-associated contaminants) at the catchment scale. These methods have largely developed independently of the use of tracers to document the source and dispersal pathways of contaminated particles from point-sources of anthropogenic pollution at the reach- to river corridor-scale. Future studies are likely to begin merging the strengths of both approaches while relying on multiple tracer types to address management and regulatory issues, particularly within the context of the rapidly developing field of environmental forensics.
