Corte Madera Creek, Marin County, California, Modified Unit 4 Sedimentation Study PDF Download

Author: Ronald R. Copeland
Publisher:
ISBN:
Category : Corte Madera Creek (Calif.)
Languages : en
Pages : 78

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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Sediment deposition occurs in the lower reaches of the concrete-lined Corte Madera Creek flood control channel because the elevation of the channel bottom is below sea level. These sediment deposits, combined with the presence of tube worms and barnacles on the channel walls, reduce the flood-carrying capacity of the channel. The upstream portion of the original flood control project was not completed and flood flows above 3,000 cfs are not contained in the natural channel upstream. Thus, there is reduced flow competency to carry the coarse sediment load delivered by flood flows. With annual maintenance and upstream containment of breakout flows, most of the sediment deposited in the concrete channel from seasonal antecedent flow can be washed out by the time the flood peak occurs. An HEC-6 numerical sedimentation model study was conducted to evaluate several alternative plans to provide flood containment and sediment storage while also maintaining the natural characteristics of the upstream channel.

Author:
Publisher:
ISBN:
Category : Flood control
Languages : en
Pages : 176

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Author: United States. Congress. House
Publisher:
ISBN:
Category : Legislation
Languages : en
Pages : 2098

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Some vols. include supplemental journals of "such proceedings of the sessions, as, during the time they were depending, were ordered to be kept secret, and respecting which the injunction of secrecy was afterwards taken off by the order of the House".

Author:
Publisher:
ISBN:
Category : Environmental impact statements
Languages : en
Pages : 482

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Author: Arnas Palaima
Publisher: Univ of California Press
ISBN: 0520274296
Category : Nature
Languages : en
Pages : 288

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The San Francisco Bay, the biggest estuary on the west coast of North America, was once surrounded by an almost unbroken chain of tidal wetlands, a fecund sieve of ecosystems connecting the land and the Bay. Today, most of these wetlands have disappeared under the demands of coastal development, and those that remain cling precariously to a drastically altered coastline. This volume is a collaborative effort of nearly 40 scholars in which the wealth of scientific knowledge available on tidal wetlands of the San Francisco Estuary is summarized and integrated. This book addresses issues of taxonomy, geomorphology, toxicology, the impact of climate change, ecosystem services, public policy, and conservation, and it is an essential resource for ecologists, environmental scientists, coastal policymakers, and researchers interested in estuaries and conserving and restoring coastal wetlands around the world.

Author: Julie Beagle
Publisher:
ISBN: 9781950313013
Category :
Languages : en
Pages : 260

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As the climate continues to change, San Francisco Bay shoreline communities will need to adapt in order to build social and ecological resilience to rising sea levels. Given the complex and varied nature of the Bay shore, a science-based framework is essential to identify effective adaptation strategies that are appropriate for their particular settings and that take advantage of natural processes. This report proposes such a framework--Operational Landscape Units for San Francisco Bay.

Author: Roger A. Barnhart
Publisher:
ISBN:
Category : Ecology
Languages : en
Pages : 134

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Author: A. Fares
Publisher: WIT Press
ISBN: 1845640918
Category : Science
Languages : en
Pages : 433

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Coastal watersheds differ from others by their unique features, including proximity to the ocean, weather and rainfall patterns, subsurface features, and land covers. Land use changes and competing needs for valuable water and land resources are especially more distinctive to such watersheds. This book covers recent research relevant to coastal watersheds. It addresses the impact of a stream’s chemical, biological, and sediment pollutants on the quality of the receiving waters, such as estuaries, bays, and near-shore waters. The contents of the book can be divided into three sections; a) overview of hydrological modelling, b) water quality assessment, and c) watershed management. This book differs from other hydrology books by dealing with coastal watersheds which are characterized by their unique features: including weather and rainfall patterns, subsurface characteristics, and land use and cover. In addition to academia, the book should be of interest to organizations concerned with watershed management, such as local and federal governments and environmental groups. Overall, the book is expected to satisfy a great need toward understanding and managing critical areas in many parts of the world.

Author: John Eric Auwaerter
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 460

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