importance of unique events/thresholds discrete vs. continuous processes storms disturbance...
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Importance of unique events/thresholds
Discrete vs. continuous processesStorms
DisturbanceLandslides
Debris Flows
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Critical Distance from drainage divide = channelization
6. How and where are channels initiated on slopes?
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Rain splash
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Where flow is thin, rainsplash disturbance prevents channelization
Incision begins when shear stress exceeds
strength
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Hillslope- channel transition, colluvial hollows
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5. Explain two biologic effects on soil strength and erosion.
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Other biotic effects - vary by climate and location
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4. Describe the physical characteristics of debris flows and the deposits they leave.
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3. Describe how slope stability is modeled for planar and rotational slides.
http://ees.as.uky.edu/sites/default/files/elearning/module11swf.swf
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FORCE BALANCE
GRAVITY
SHEAR STRENGTH (FRICTION
AND COHESION or VISCOSITY)
DRIVING VERSUS RESISTING
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Rotational failure - clay, silt, homogeneous material
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2. What is cohesion and why is it important geomorphically?
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1. Predict the effect of a heavy rainstorm on slope stability and explain the reasoning behind your prediction.