Author: United States. Army. Corps of EngineersPublisher:
ISBN:
Category : Dredging
Languages : en
Pages : 414
Book Description
Commercial Sand and Gravel Dredging Operations, Ohio River Mile 438.0 to Mile 981.0
Author: United States. Army. Corps of EngineersPublisher:
ISBN:
Category : Dredging
Languages : en
Pages : 414
Book Description
Ohio River Commercial Sand and Gravel Dredging
Author: Allegheny River Sand and Gravel Dredging
Author: Sand and Gravel Dredging in the Chattahoochee River National Recreation Area, Georgia
Author: Commercial Sand and Gravel Dredging Operations in the Allegheny and Ohio Rivers, Pennsylvania
Author: Chattahoochee River N.R.A. Sand and Gravel Dredging, Gwinnett County
Author: Effects of Trawling and Dredging on Seafloor Habitat
Author: National Research CouncilPublisher: National Academies Press
ISBN: 0309083400
Category : Science
Languages : en
Pages : 137
Book Description
Concerns over the potential ecological effects of fishing have increased with the expansion of fisheries throughout the marine waters of the United States. Effects of Trawling and Dredging on Seafloor Habitat describes how assessment of fishing impacts depends on gear type, number and location of bottom tows, and the physical and biological characteristics of seafloor habitats. Many experimental studies have documented acute, gear-specific effects of trawling and dredging on various types of habitat. These studies indicate that low mobility, long-lived species are more vulnerable to towed fishing gear than short-lived species in areas where the seabed is often disturbed by natural phenomena. Trawling and dredging may also change the composition and productivity of fish communities dependent on seafloor habitats for food and refuge. The scale of these impacts depends on the level of fishing effort. This volume presents color maps of fishing effort for all regions with significant bottom trawl or dredge fisheries-the first time that such data has been assembled and analyzed for the entire nation.
Sandy Beach Morphodynamics
Author: Derek JacksonPublisher: Elsevier
ISBN: 0081029276
Category : Science
Languages : en
Pages : 814
Book Description
Sandy beaches represent some of the most dynamic environments on Earth and examining their morphodynamic behaviour over different temporal and spatial scales is challenging, relying on multidisciplinary approaches and techniques. Sandy Beach Morphodynamics brings together the latest research on beach systems and their morphodynamics and the ways in which they are studied in 29 chapters that review the full spectrum of beach morphodynamics. The chapters are written by leading experts in the field and provide introductory level understanding of physical processes and resulting landforms, along with more advanced discussions.
French Broad, Tennessee, Cumberland Rivers Commercial Sand and Gravel Dredging (AL,TN)
Author: The Delft Sand, Clay and Rock Cutting Model
Author: S.A. MiedemaPublisher: IOS Press
ISBN: 1614994544
Category : Technology & Engineering
Languages : en
Pages : 572
Book Description
Sand, clay and rock have to be excavated for a variety of purposes, such as dredging, trenching, mining (including deep sea mining), drilling, tunnel boring and many other applications. Many excavations take place on dry land, but they are also frequently required in completely saturated conditions, and the methods necessary to accomplish them consequently vary widely. This book provides an overview of cutting theories. It begins with a generic model, valid for all types of soil (sand, clay and rock), and continues with the specifics of dry sand, water-saturated sand, clay, atmospheric rock and hyperbaric rock. Small blade angles and large blade angles are discussed for each soil type, and for each case considered the equations/model for cutting forces, power and specific energy are given. With models verified by laboratory research, principally from the Delft University of Technology, and data from other recognized sources, this book will prove an invaluable reference for anybody whose work involves major excavations of any kind.