Download or read book Russian River Estuary Study written by Peter Goodwin and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Russian River Basin Study written by United States. Army. Corps of Engineers. San Francisco District and published by . This book was released on 1981 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Simulations of Management Scenarios in a Small Stratified Estuary written by Shreya Ravi Hegde and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Russian River Estuary (RRE) tends to trap salt that flows in from the Pacific Ocean when its mouth closes at multiple times each year. This closure leads to stratification and in some cases also flooding of local property. Different management strategies are being discussed, but here we focus on analyzing time evolution of salt mass through a set of six simulations that are each performed over a period of two months. The Biological Opinion, 2011, has specified a target condition for the river inflow and outlet elevation which is tested herein for a case of fast closure and slow closure, to observe the changes in density stratification in the RRE. A list of runs with changes to the target condition, are set up and their results analyzed. The results from this set of simulations show that, with respect to loss of salinity, the conditions with the highest outlet bed elevation (closed outlet), have the fastest loss of almost all the salt in the system within the given two-month time period. This is part of a broader effort to develop estuary management protocols that will yield improved habitat for juvenile steelhead (NMFS 2008). Through a subcontract to the Sonoma County Water Agency (SCWA), ESA and Philip Williams and Associates (ESA PWA) requested that the University of California Davis (UCD) perform this modeling study, which draws from the results of a separate but related field study conducted in the Russian River estuary during the summer-fall management season in 2009 (Behrens & Largier 2010, Largier & Behrens 2010).
Download or read book Russian River Basin Study written by United States. Army. Corps of Engineers and published by . This book was released on 1980 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Russian River Estuary Management Project written by Environmental Science Associates and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This document provides an analysis of environmental impacts resulting from the proposed Russian River Estuary Management Plan. The project is intended to fulfill federal mandates to implement adapative management of the estuary to enhance fisheries habitat while minimizing flood risk to the town of Jenner, Calif., located at the immediately upstream of the mouth of of the estuary. Implementation of the project would involve management of the estuary as a summer lagoon (May 15-Oct. 15) and continuation of artificial breaching practices during the remainder of the year. This final EIR reviews the draft EIR process, identified impacts and response to comments.
Download or read book The Russian River Estuary written by Dane Kristopher Behrens and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Bar-built estuaries with unstable tidal inlets are widespread in Mediterranean climates and along wave-exposed coasts. While similarly important to coastal sediment balances and estuarine ecosystems, and more numerous than larger inlet systems, they suffer from a relative lack of understanding. This is a result of the setting: bar-built estuaries lie at a nexus of coastal and fluvial environments, often behaving like lakes with extreme variability in boundary conditions. At the ocean-side boundary, inlet channel blockage from wave-driven sedimentation is common, leading to water levels in the lagoon that are consistently higher than ocean levels (perched conditions) or to complete disconnection between the lagoon and the ocean (inlet closure). During times when the inlet channel allows tidal conveyance, flood tides provide saline, nutrient-rich water and vigorous turbulent mixing. Inlet closure traps seawater in the estuary and transforms these systems into salt-stratified coastal lakes. The amount of habitat space provided by the closed system is then constrained by the extent of the salt field, since it has marked effects on temperature and dissolved oxygen. Although closed and perched conditions are natural, encroachment from agriculture, roads and development has led to a host of fundamental changes to the way the inlet and estuary function. Combined with the present lack of understanding of how these systems behave in response to natural processes, this will be a growing concern as long-term shifts in climate continually alter the landscape and forcing conditions. This dissertation explores three areas in need of better understanding: (1) Variability of inlet closure frequency, (2) response of the estuarine salt field to inlet closure, and (3) the influence of inlet management on stratification in the estuary. These questions are addressed by examining the Russian River Estuary (RRE), a prototypical bar-built estuary in Northern California. This work builds from existing studies of the site by the author, leveraging a uniquely extensive set of in situ observations of daily inlet behavior with additional field and numerical modeling work. The aim is to use these tools to provide a more complete picture of the combined function of the inlet and estuary than is currently present in the literature. Inlet closure frequency is examined using over 60 years of daily closure records detailing the behavior of the Russian River mouth. Inlet morphological behavior is shown to be a response to processes which act to scour the inlet (driven by tides and river flows) and processes that act to deposit sand in the inlet (driven by waves). The observed time-dependent closure pattern is shown to be well-described as a response to tidal, weather-related, seasonal and interannual processes. A parametric model is developed to predict closure events in the short- and seasonal-term scales, and is shown to improve on existing models. Lastly, closure records from the nineteenth and twentieth centuries are compared, showing that inlet closures have become shorter and more sporadic over time at this site. Long term shifts such as this are examined within the context of management practices and climate variability. The evolution of the salt field is tracked during several inlet closure events in 2009 and 2010 using repeated boat-based conductivity temperature depth (CTD) surveys, stationary sondes and upward facing acoustic doppler current profilers (ADCPs). The motion of the intruding salt front is in general well-studied in relatively deep estuaries with gradually varying bathymetry. However, in bar-built estuaries such as the RRE, the mechanisms of upstream salt transport are more obscure, since these systems are often associated with sharply-varying bathymetry resulting from extensive meandering and high stream gradients. The field data are used to show that the salt front movement persists in the estuary despite these characteristics. Empirical orthogonal functions and a horizontal Richardson Number are employed to link the salt transport into the inner estuary to buoyancy-driven currents which move epilimnetic salt water upstream along the top of the pycnocline when diurnal winds are not active. Internal waves are also present, but are limited by the bathymetry in the extent to which they transport salt upstream. Volumetric capacity of the pools upstream of the front and turbulence caused by diurnal winds are shown to be the main impediment to the salt front advance. The impacts of inlet management on stratification in the estuary are assessed by examining two practices: (1) Allowing the inlet to remain closed and (2) enforcing perched conditions by cutting a one-way supratidal outflow channel over the beach. The ramifications of the latter are presently unknown. A numerical model is used to examine the different outcomes achieved during hypothetical two-week closure and overflow events at the RRE. The model uses a two-dimensional (x-z plane) representation that emphasizes the vertical salt stratification in the estuary. The modeling results show that having an overflow channel only several meters above the pycnocline results in strengthened stratification when winds are applied, while inlet closure leaves stratification mostly intact. Long-term changes in estuary salt mass are well-described as a function of the hydraulic gradient through the beach during closure, and as a function of vertical diffusion of salt during perched overflow. A ratio of the magnitudes of seepage flow out of the beach and vertical diffusive flow of salt across the pycnocline is a good descriptor of which process will dominate the long-term evolution of salt in the estuary. Boat-based field data confirm the model results, suggesting that the two management states present divergent outcomes in the estuary.
Download or read book Russian River Study II written by California. Bureau of Sanitary Engineering and published by . This book was released on 1971 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Russian River Public Access Study written by and published by . This book was released on 1991 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Russian River Basin Study written by and published by . This book was released on 1980 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Eel Russian Rivers Streamflow Augmentation Studies written by California. Department of Water Resources and published by . This book was released on 1976 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Treatise on Estuarine and Coastal Science written by and published by Academic Press. This book was released on 2012-03-06 with total page 4604 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of estuaries and coasts has seen enormous growth in recent years, since changes in these areas have a large effect on the food chain, as well as on the physics and chemistry of the ocean. As the coasts and river banks around the world become more densely populated, the pressure on these ecosystems intensifies, putting a new focus on environmental, socio-economic and policy issues. Written by a team of international expert scientists, under the guidance of Chief Editors Eric Wolanski and Donald McClusky, the Treatise on Estuarine and Coastal Science, Ten Volume Set examines topics in depth, and aims to provide a comprehensive scientific resource for all professionals and students in the area of estuarine and coastal science Most up-to-date reference for system-based coastal and estuarine science and management, from the inland watershed to the ocean shelf Chief editors have assembled a world-class team of volume editors and contributing authors Approach focuses on the physical, biological, chemistry, ecosystem, human, ecological and economics processes, to show how to best use multidisciplinary science to ensure earth's sustainability Provides a comprehensive scientific resource for all professionals and students in the area of estuarine and coastal science Features up-to-date chapters covering a full range of topics
Download or read book Santa Rosa Subregional Long term Wastewater Project written by and published by . This book was released on 1998 with total page 824 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coastal Engineering 2008 In 5 Volumes Proceedings Of The 31st International Conference written by Jane Mckee Smith and published by World Scientific. This book was released on 2009-05-05 with total page 5136 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings contains papers presented at the 31st International Conference on Coastal Engineering, which has held in Hamburg, Germany (31 August - 5 September 2008). The proceeding is divided into five parts: Waves; Long Waves, Nearshore Currents, and Swash; Sediment Transport and Morphology; Coastal Management, Environment, and Risk; and Coastal Structures. The papers cover a broad range of topics including theory, numerical and physical modeling, field measurements, case studies, design, and management. Coastal Engineering 2008 provides coastal engineers, scientists, and planners, with state-of-the-art information on coastal engineering and coastal processes.
Download or read book Russian River Comprehensive Study written by United States. Army. Corps of Engineers. San Francisco District and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Staff Report Russian River Watershed written by and published by . This book was released on 1997 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Russian River and Its Watershed written by Richard McDaniel and published by . This book was released on 2019-10-04 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book National Estuary Study Appendix C Additional support data for biophysical profiles Appendix D Estuarine landscape survey and analysis written by United States. Bureau of Sport Fisheries and Wildlife and published by . This book was released on 1970 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
