Question | Answer |
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. |