Geog May 16 - Geography 3B May 13 & 16, 2011 Darceys...

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Geography 3B Darcey ʼ s Law Chezy Law Sediment Transport Equation Humstrom Curve Erosion The forms that River Channels can take: Small scare forms on the bed of a channel cross section channels plan-view of the channel (straight, braided, meandering) longitudinal proFle of channel Channel Bedforms - ripple, dune like forms that channel bed can take ripples, dunes with superimposed ripples, dunes, washed out dunes, plane bed, standing wave anitdunes, antidunes, chute and pool relationship between stream power (discharge, velovity) and channel bedforms, at lowest ±ows=plain bedforms, intermediate ripples, to dunes, then antidunes Relationship between slope and form river will take steep slope=as straight as river can be, less stability, turbulence energy is high, water velocity is high Water will Fnd pathway through bedrock of least resistance, Fnd veins and seams of weaker geologic material will carve sandstone over shale Alluvial channels formed in alluvial material- running through lowlands, ±ood material
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Geog May 16 - Geography 3B May 13 & 16, 2011 Darceys...

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