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Debris-flow volume quantile prediction from catchment morphometry

Tjalling de Haas and Alexander L. Densmore
Debris-flow volume quantile prediction from catchment morphometry
Geology (Boulder) (August 2019) 47 (8): 791-794

Abstract

Estimation of the volumes of potential future debris flows is a key factor in hazard assessment and mitigation. Worldwide, however, there are few catchments for which detailed volume-frequency information is available. We (1) reconstructed volume-frequency curves for 10 debris-flow catchments in Saline Valley, California (USA), from a large number of well-preserved, unmodified surficial flow deposits, and (2) assessed the correlations between lobe-volume quantiles and a set of morphometric catchment characteristics. We found statistically significant correlations between lobe-volume quantiles, including median and maximum, and catchment relief, length (planimetric distance from the fan apex to the most distant point along the watershed boundary), perimeter, and Melton ratio (relief divided by the square root of catchment area). These findings show that it may be possible to roughly estimate debris-flow lobe-volume quantiles from basic catchment characteristics that can be obtained from globally available elevation data. This may assist in design-volume estimation for debris-flow catchments where past flow volumes are otherwise unknown.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 47
Serial Issue: 8
Title: Debris-flow volume quantile prediction from catchment morphometry
Affiliation: Durham University, Department of Geography, Durham, United Kingdom
Pages: 791-794
Published: 201908
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 32
Accession Number: 2019-068834
Categories: Environmental geology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: GSA Data Repository item 2019278
Illustration Description: illus. incl. 1 table, sketch map
N36°45'00" - N36°45'00", W117°49'00" - W117°49'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201936
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