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GEOREF RECORD

Debris basin and deflection berm design for fire-related debris-flow mitigation

Abstract

Debris flows are hazardous because of their poor predictability, high impact forces, and ability to deposit large quantities of sediment in inundated areas. To minimize the risk to developments on alluvial fans, debris-flow mitigation structures may be required. This study reviewed the state of practice for the design of two types of debris-flow mitigation structures: basins and deflection berms. Published guidelines for these structures are rare, and there appears to be little standardization. Recommended design improvements, particularly for fire-related debris flows, include incorporating several recent developments in debris-flow mitigation design, reducing subjectivity, and enhancing the technical basis for the designs. Specific shortcomings of existing design methodologies include techniques for predicting debris-flow volume, specifications for berm geometry, impact loading considerations, and lack of flexibility in outlet works design, among others. Proposed solutions and guidelines for these issues are presented.


ISSN: 1078-7275
EISSN: 1558-9161
Coden: ENGEA9
Serial Title: Environmental & Engineering Geoscience
Serial Volume: 14
Serial Issue: 4
Title: Debris basin and deflection berm design for fire-related debris-flow mitigation
Affiliation: Colorado School of Mines, Department of Geology and Geological Engineering, Golden, CO, United States
Pages: 297-313
Published: 200811
Text Language: English
Publisher: Association of Engineering Geologists and the Geological Society of America, College Station, TX, United States
References: 66
Accession Number: 2009-015081
Categories: Engineering geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 4 tables
N39°45'00" - N40°34'60", W112°15'00" - W110°52'60"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Association of Engineering Geologists and the Geological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 200909
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