Geography 1100 Dec 4 2012
Size of Drainage Basin -
Valley Side Steepness - rainfall event being generated, higher peek.
Vegetation- if surfact is bear, then more water gets into the river faster.
Forest: 80-90% of precipitation moves into the ground.
Agriculture: 40-50% of precipitation moves into the ground.
Suburban: 50-60% of precipitation moves into the ground.
rain or snow
earthquakes can cause flooding
ice dammed lakes
Whatcanintensifyflooding-change in the nature of the basin such as:
Topography- steep slides and slopes
Vegetation- surfaces that have high amounts of vegetation hold more amounts of water
Soil and geology
Effects of Humans- the building of dams, bridges over dams. Every time you build a bridge overa river you
make the river a litle narrower which narrows the stream which can backup water behind the bridge
Shape of Basin- narrow round can effect flooding potential. When river lengths are different, wa