Download or read book Evaluation of Pier scour Equations for Coarse bed Streams written by Katherine J. Chase and published by . This book was released on 2004 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Streambed scour at bridge piers is among the leading causes of bridge failure in the United States. Several pier-scour equations have been developed to calculate potential scour depths at existing and proposed bridges. Because many pier-scour equations are based on data from laboratory flumes and from cohesionless silt- and sand-bottomed streams, they tend to overestimate scour for piers in coarse-bed materials. Several equations have been developed to incorporate the mitigating effects of large particle sizes on pier scour, but further investigations are needed to evaluate how accurately pier-scour depths calculated by these equations match measured field data. This report, prepared in cooperation with the Montana Department of Transportation, describes the evaluation of five pier-scour equations for coarse-bed streams. Pier-scour and associated bridge-geometry, bed-material, and streamflow measurement data at bridges over coarse-bed streams in Montana, Alaska, Maryland, Ohio, and Virginia were selected from the Bridge Scour Data Management System. Pier scour calculated using the Simplified Chinese equation, the Froehlich equation, the Froehlich design equation, the HEC-18/Jones equation and the HEC-18/Mueller equation for flood events with approximate recurrence intervals of less than 2 to 100 years were compared to 42 pier-scour measurements. Comparison of results showed that pier-scour depths calculated with the HEC-18/Mueller equation were seldom smaller than measured pier-scour depths. In addition, pier-scour depths calculated using the HEC-18/Mueller equation were closer to measured scour than for the other equations that did not underestimate pier scour. However, more data are needed from coarse-bed streams and from less frequent flood events to further evaluate pier-scour equations.
Download or read book Scientific Investigations Report written by and published by . This book was released on 2004 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oil spill in the Kerch Strait written by and published by UNEP/Earthprint. This book was released on 2008 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report lists recommendations to help Ukraine complete its recovery from the oil spill that occurred in the Kerch Strait in November 2007, when a severe storm caused the Volgoneft-139 to release over 1,300 tonnes of fuel oil into the sea. The resulting extensive physical damage to the sea and land led to property losses, contamination of the marine and coastal flora and fauna, as well as high clean-up costs and significant revenue losses for local industries.
Download or read book Guide to Site Investigation written by and published by . This book was released on 1987 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Companion to Cultural Resource Management written by Thomas F. King and published by John Wiley & Sons. This book was released on 2011-03-29 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Companion to Cultural Resource Management is an essential guide to those wishing to gain a deeper understanding of CRM and heritage management. Expert contributors share their knowledge and illustrate CRM's practice and scope, as well as the core issues and realities in preserving cultural heritages worldwide. Edited by one of the world's leading experts in the field of cultural resource management, with contributions by a wide range of experts, including archaeologists, architectural historians, museum curators, historians, and representatives of affected groups Offers a broad view of cultural resource management that includes archaeological sites, cultural landscapes, historic structures, shipwrecks, scientific and technological sites and objects, as well as intangible resources such as language, religion, and cultural values Highlights the realities that face CRM practitioners "on the ground"
Download or read book Inspection manual for highway structures written by Highways Agency and published by The Stationery Office. This book was released on 2007-06-11 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dated May 2007. This title, and its companion volume 2 "Inspector's handbook" (ISBN 9780115527982), supersede "Bridge inspection guide" (1984, ISBN 9780115506383)
Download or read book Evaluation of Bridge scour Data at Selected Sites in Ohio written by K. S. Jackson and published by . This book was released on 1996 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scour data collected during 1989-1994 were evaluated to determine whether pier scour and contraction scour occurred at 22 bridge sites in Ohio. Pier-scour depths computed from selected pier-scour prediction equations were compared with measured pier-scour depths, and the accuracy of the prediction equations were evaluated. Observed pier-scour relations were compared to similar relations developed through laboratory research. Mean streambed elevations were evaluated to determine the depth of contraction scour. Channel stability was assessed by use of mean streambed elevations at the approach section. Ground-penetrating radar was used at all sites to investigate the presence of historical scour.
Download or read book The Pre Quaternary Geology of Hong Kong written by and published by . This book was released on 2000 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Manufacturing Engineering Education written by J. Paulo Davim and published by Chandos Publishing. This book was released on 2018-09-19 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Manufacturing Engineering Education includes original and unpublished chapters that develop the applications of the manufacturing engineering education field. Chapters convey innovative research ideas that have a prodigious significance in the life of academics, engineers, researchers and professionals involved with manufacturing engineering. Today, the interest in this subject is shown in many prominent global institutes and universities, and the robust momentum of manufacturing has helped the U.S. economy continue to grow throughout 2014. This book covers manufacturing engineering education, with a special emphasis on curriculum development, and didactic aspects. - Includes original and unpublished chapters that develop the applications of the manufacturing engineering education principle - Applies manufacturing engineering education to curriculum development - Offers research ideas that can be applied to the work of academics, engineers, researchers and professionals
Download or read book Field Observations and Evaluations of Streambed Scour at Bridges written by U. S. Department Of Transportation and published by CreateSpace. This book was released on 2015-03-12 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridge piers and highway embankments leading to a bridge often obstruct the flow of floodwaters, causing an increase in velocity and the development of vortices. The increased velocity and vortices often cause scour near the bridge foundations. The damage to and failure of bridges caused by scour are problems of national concern. This report describes the results of the second USGS national field-data collection and analysis study on scour at bridges, funded by FHWA. The database originally developed during the first national study has been enhanced and many scour measurements added, including measurements of abutment and contraction scour. Sufficient local pier scour data are now available to permit a detailed analysis of local pier scour. Scour depths computed from published pier scour equations are compared to the field measurements. Many commonly cited dimensionless variables believed to control the depth of scour are evaluated and compared with equations developed from laboratory data. The effect of the size and gradation of the bed material on the depth of scour is investigated, and a correction factor for the HEC-18 pier scour equation is proposed. Available data are insufficient to permit a detailed investigation of contraction and abutment scour; however, some basic comparisons and qualitative observations are presented on the basis of a review of the literature. The results of scour analyses for two contracted bridges are compared with real-time field data.
Download or read book H O Pub written by United States. Hydrographic Office and published by . This book was released on 1915 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of pier scour in coarse bed streams in Montana 2001 through 2007 written by Stephen R. Holnbeck and published by . This book was released on 2011 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hybrid Nanofluids written by Zafar Said and published by Elsevier. This book was released on 2022-01-28 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hybrid Nanofluids: Preparation, Characterization and Applications presents the history of hybrid nanofluids, preparation techniques, thermoelectrical properties, rheological behaviors, optical properties, theoretical modeling and correlations, and the effect of all these factors on potential applications, such as solar energy, electronics cooling, heat exchangers, machining, and refrigeration. Future challenges and future work scope have also been included. The information from this book enables readers to discover novel techniques, resolve existing research limitations, and create novel hybrid nanofluids which can be implemented for heat transfer applications. Describes the characterization, thermophysical and electrical properties of nanofluids Assesses parameter selection and property measurement techniques for the calibration of thermal performance Provides information on theoretical models and correlations for predicting hybrid nanofluids properties from experimental properties
Download or read book After Mountains and Sea written by Helen Frankenthaler and published by Guggenheim Museum. This book was released on 2003-07-02 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Essays by Susan Cross and Julia Brown.
Download or read book Pier Scour in Clear Water Conditions with Non Uniform Bed Materials written by U. S. Department Transportation and published by CreateSpace. This book was released on 2015-03-14 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydraulics and scour hazards cause over half of the bridge failures in the United States and have been identified by State bridge authorities as one of the top issues in bridge design and maintenance. Current pier scour design in the United States is mainly based on the Colorado State University (CSU) equation, which is described in Hydraulic Engineering Circular No. 18 (HEC-18). A recent evaluation of bridge scour research indicated a need to change the current method because substantial advances have been made in understanding pier scour processes. The evaluation compared several methods and considered which methods effectively included the variables now believed to determine pier scour characteristics. The objective of this report is to describe a new method for estimating pier scour based on an understanding of the flow-structure-sediment interactions and to address the weaknesses in earlier methods. This research focuses on clear-water scour at singular piers in non-cohesive sediment mixtures. The approach was to review previous pier scour methods, formulate an improved model for scour formation, and evaluate the new model using laboratory and field data.
Download or read book Code of practice for site investigations written by British Standards Institution and published by . This book was released on 2010 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scars and Memories written by Odie Hawkins and published by Open Road Distribution. This book was released on 2016-07-19 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: The deeply personal story of Odie Hawkins's journey, from "the poorest of the poor" childhood in Chicago to Hollywood screenwriter--and the people who deeply mattered. A tough, touching autobiography.
