CHARACTERISTICS OF DEBRIS FLOWS OF NONERUPTIVE ORIGIN
ON MOUNT SHASTA, NORTHERN CALIFORNIA
By James C. Blodgett, Karen R. Poeschel, and Waite R. Osterkamp
Open-File Report 96-144
ABSTRACT
INTRODUCTION
GEOLOGIC SETTING
SOURCE AND OCCURRENCE OF DEBRIS FLOWS
FACTORS ASSOCIATED WITH OCCURRENCE OF DEBRIS
FLOWS
Release of Water from Channels Blocked by Debris Deposits
Release of Water from Channels Blocked by Snow and Ice
Direct Runoff from Precipitation
CHARACTERISTICS AND PROPERTIES OF DEBRIS
FLOWS
Characteristics and Properties of Debris Flows
Pattern of Travel and Deposition
Thickness of Debris-Flow Deposits
Cross-Sectional Shape of Deposits
Sediment and Water Ratio of Debris-Flow Slurries
SUMMARY
REFERENCES CITED
CONVERSION FACTORS
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Multiply By To obtain
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kilometer 0.6215 mile
meter 3.281 foot
meter per second 3.281 foot per second
millimeter 0.003281 foot
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Air temperature is given in degrees Celsius (C), which can be converted to
degrees Fahrenheit (F) by the following equation:
Temp degrees Fahrenheit = 1.8 temp degrees Celsius + 32.
Sea level: In this report, "sea level" refers to the National Geodetic
Vertical Datum of 1929 (NGVD of 1929)-a geodetic datum derived from a general adjustment
of the first-order level nets of both the United States and Canada, formerly called Sea Level
Datum of 1929.
Abstract
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