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chapter 10

chapter 10 and 18

QuestionAnswer
what is recurrence interval? average time between floods of a given discharge
flash flood? local sudden short floods
how gradient affects velocity high gradient high velocity erosion and transport, drop in gradient drop in velocity, deposition
different ways in which a stream transports sediment bed load, suspended load, and dissolved load
what is bed load sand and gravel spend most of their time on the stream bed
what is suspended load silt and clay spend most of their time suspended above the bed
what is dissolved load soludable products of chemical weathering usually invisible
what is downcutting deepening of the valley by erosion of a stream bed
what is base level? sea level rise or drop, tectonic upift. Base level drops renewed downcutting. base level rises lateral erosion
what is bars? sand and gravel on the beds or banks of a stream. larger streams sand bar. Smaller streams gravel bars
braided streams? network of interconecting channels around numerous bars common in arid regions
meandering streams? is a bend. common in humid regions
cut bank? outer part of a stream bend, erosion on outside
point bar? inside part of the stream bend, deposition on inside
oxbow lake? cut off of the river
delta? when stream runs into a standing body of water, tends to form thick sediments
alluvial fan? they form on land, really common on desert regions
what are the stream deposits? bars, braided stream, meandering, cut bank, point bar, oxbow lake, delta, alluvial fan,
drainage patterns? dendritic, radial, and trellis
dendritic? tree shaped, horizontal sedimentary
radial? splitting apart, volcanic landforms
trellice? bunch streams moving downward with small branches
what is drainage basin? its an area involves stream and land. the entire area drained by a stream and its tributaries
floodplain? part of the riversystem. it is an area capable of being flooded
saltation? series of hops and bounces
drainage divide? an elevated boundary that separates neighboring drainage basins.
Created by: sanchezdaniel