rivers Flashcards
source
start of the river
watershed
boundary of drainage basin
tributary
small river in a drainage basin
drainage basin
area of land drained by a river system
mouth
end of river
confluence
where one tributary joins another
precipitation
forms of rainfall
interception
where water is prevented from reaching the surface
percolation
when rainwater enters rock
overland flow
rainwater flowing on land
infiltration
rainwater travelling through soil
base flow
water flowing from rock into the river
through flow
water travelling through soil
permeable surface
allows water to go through it
examples of permeable surfaces
sandstone, limestone, chalk
impermeable surfaces
surfaces that do not allow water through it
examples of impermeable surfaces
granite, man-made surfaces
what is the difference between erosion and weathering
weathering:
movement is not involved (in situ)
material is angular (Scree)
erosion:
movement is involved
materials are rounded and smooth
what is SCREE
bits of rocks that fall off the cliff face