|
Creado por katiehumphrey
hace más de 10 años
|
|
processes of erosion
processes of transportation: the movement of eroded material
course of the river
features of a drainage basin
causes of flooding
flood managements
the hydrological cycle
infiltration
percolation
throughflow
groundwater flow
surface runoff
channel flow
channel storage
groundwater storage
interception storage
surface storage
permeable rocks
impermeable rocks
drainage basin
drainage basins are separated by a boundary called a watershed - ridges of high land
a drainage basin
tributary
source
confluence
mouth
weathering in a drainage basin
mechanical weathering
chemical weathering
biological weathering
hydraulic action
corrasion
attrition
corrosion
traction
saltation
suspension
solution
deposition
waterfalls and gorges are found in the upper course of a river
interlocking spurs
meanders:
large bends in a river
ox-bow lakes:
formed from meanders
flood plain
levees:
natural embankments along the edges of a river channel
deltas:
low lying areas where a river meets the sea or a lake
types of delta
river discharge
storm hydrograph
peak discharge
lag time
rising limb
falling limb
factors that increase discharge and make the hydrograph steeper
factors that decrease discharge and make the hydrograph gentler
urban areas have drainage systems and are covered with impermeable materials increasing discharge so hydrographs are steep
human causes of flooding
hard engineering to reduce flooding
soft engineering to reduce flooding
hard engineering
soft engineering
flood in MEDC:
River Eden, Carlisle, 8.1.2005
heavy rainfall
flood in LEDC:
River Ganges, India, July 2007
heavy rainfall