Guidelines for the Geologic Evaluation of Debris-flow Hazards on Alluvial Fans in Utah PDF Download
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Author: Richard E. Giraud
Publisher: Utah Geological Survey
ISBN: 1557917299
Category : Science
Languages : en
Pages : 21
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Book Description
The Utah Geological Survey (UGS) developed these guidelines to help geologists evaluate debris-flow hazards on alluvial fans to ensure safe development. Debris-flow hazard evaluations are particularly important because alluvial fans are the primary sites of debris-flow deposition and are also favored sites for development. The purpose of a debris-flow-hazard evaluation is to characterize the hazard and provide design parameters for risk reduction. The UGS recommends critical facilities and structures for human occupancy not be placed in active debris flow travel and deposition areas unless the risk is reduced to an acceptable level. These guidelines use the characteristics of alluvial fan deposits as well as drainage-basin and feeder-channel sediment-supply conditions to evaluate debris-flow hazards. The hazard evaluation relies on the geomorphology, sedimentology, and stratigraphy of existing alluvial fan deposits. Analysis of alluvial-fan deposits provides the geologic basis for estimating frequency and potential volume of debris flows and describing debris-flow behavior. Drainage-basin and feeder-channel characteristics determine potential debris-flow susceptibility and the volume of stored channel sediment available for sediment bulking in future flows.
Author: Richard E. Giraud
Publisher: Utah Geological Survey
ISBN: 1557917299
Category : Science
Languages : en
Pages : 21
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Book Description
The Utah Geological Survey (UGS) developed these guidelines to help geologists evaluate debris-flow hazards on alluvial fans to ensure safe development. Debris-flow hazard evaluations are particularly important because alluvial fans are the primary sites of debris-flow deposition and are also favored sites for development. The purpose of a debris-flow-hazard evaluation is to characterize the hazard and provide design parameters for risk reduction. The UGS recommends critical facilities and structures for human occupancy not be placed in active debris flow travel and deposition areas unless the risk is reduced to an acceptable level. These guidelines use the characteristics of alluvial fan deposits as well as drainage-basin and feeder-channel sediment-supply conditions to evaluate debris-flow hazards. The hazard evaluation relies on the geomorphology, sedimentology, and stratigraphy of existing alluvial fan deposits. Analysis of alluvial-fan deposits provides the geologic basis for estimating frequency and potential volume of debris flows and describing debris-flow behavior. Drainage-basin and feeder-channel characteristics determine potential debris-flow susceptibility and the volume of stored channel sediment available for sediment bulking in future flows.
Author: Steve D. Bowman
Publisher: Utah Geological Survey
ISBN: 1557919291
Category : Science
Languages : en
Pages : 217
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Book Description
The purpose of these guidelines for investigating geologic hazards and preparing engineering-geology reports, is to provide recommendations for appropriate, minimum investigative techniques, standards, and report content to ensure adequate geologic site characterization and geologic-hazard investigations to protect public safety and facilitate risk reduction. Such investigations provide important information on site geologic conditions that may affect or be affected by development, as well as the type and severity of geologic hazards at a site, and recommend solutions to mitigate the effects and the cost of the hazards, both at the time of construction and over the life of the development. The accompanying suggested approach to geologic-hazard ordinances and school-site investigation guidelines are intended as an aid for land-use planning and regulation by local Utah jurisdictions and school districts, respectively. Geologic hazards that are not accounted for in project planning and design often result in additional unforeseen construction and/or future maintenance costs, and possible injury or death.
Author: Michael D. Hylland
Publisher: Utah Geological Survey
ISBN: 1557916977
Category : Geology
Languages : en
Pages : 32
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Book Description
Moab Valley and the contiguous Spanish Valley comprise a popular residential and recreational area in east-central Utah. Geologic processes that created the rugged and scenic landscape of Moab-Spanish Valley are still active today and can be hazardous to property and life. To address development in areas with geologic hazards, the Utah Geological Survey (UGS) conducted a geologic-hazards investigation to provide information to Moab City and Grand County to help guide development and reduce losses from geologic hazards. This report includes maps of Moab Valley and the northern and central parts of Spanish Valley that provide information on geologic hazards to assist homeowners, planners, and developers in making informed decisions. The maps show areas where hazards may exist and where site-specific studies are advisable prior to development. The maps are for planning purposes only, and do not preclude the necessity for site investigations. Site-specific studies by qualified professionals (engineering geologists, geotechnical engineers, hydrologists) should evaluate hazards and, if necessary, recommend hazard-reduction measures. Because of the small scale of the maps, some hazard areas are not shown; hazard studies are therefore recommended for all critical facilities (for example, hospitals, schools, fire stations), including those outside the mapped hazard areas.
Author: Keith Daniel Putirka
Publisher: Geological Society of America
ISBN: 0813700329
Category : Science
Languages : en
Pages : 172
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Book Description
"This volume presents field guides that span the breadth of central California's geology. The trips are associated with the 2013 GSA Cordilleran Section meeting, convened in Fresno, California, 18-25 May. The guides are to geologic localities that are not only iconic, but are also type examples of key geologic phenomena"--Provided by publisher.
Author: David S. Bowles
Publisher:
ISBN:
Category : Flood control
Languages : en
Pages : 606
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Book Description
Author: Utah Geological and Mineral Survey
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 122
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Book Description
Author: William F. Case
Publisher:
ISBN:
Category : Debris avalanches
Languages : en
Pages : 1
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Book Description
Author: Oldrich Hungr
Publisher: CRC Press
ISBN: 1439833710
Category : Technology & Engineering
Languages : en
Pages : 776
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Book Description
Landslide Risk Management comprises the proceedings of the International Conference on Landslide Risk Management, held in Vancouver, Canada, from May 31 to June 3, 2005. The first part of the book contains state-of-the-art and invited lectures, prepared by teams of authors selected for their experience in specific topics assigned to them by the JTC
Author: Jessica J. Castleton
Publisher: Utah Geological Survey
ISBN: 155791849X
Category : Hazardous geographic environments
Languages : en
Pages : 78
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Book Description
This study contains 10 1:24,000 scale GIS based geologic hazard maps that include liquafaction, surface fault rupture, flood hazard, landslides, rock-fall, indoor radon potential, collapsible soils, expanisve soils, shallow bedrock and shallow groundwater potential. Also includes a 73 page accompanying report that describes the hazards and provides background information on data sources, the nature and distribution of hazards, and possible hazard reducation measures.
Author: Paula Gori
Publisher:
ISBN:
Category : Earthquake hazard analysis
Languages : en
Pages : 180
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Book Description
This report documents how pertinent information about earthquake hazards along the Wasatch Front, Utah, was transferred to researchers, public officials, design professionals, land-use planners, and emergency managers as part of the U.S. Geological Survey's effort to mitigate the effects of earthquake hazards.
