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River, floods and management Keywords Physical Geography Revision




River, floods and management
The drainage basin hydrological cycle:


Drainage Basin ­ catchment area of a river (where it obtains its water from)

Watershed ­ delimits one drainage basin from another

Inputs ­ moisture into the cycle (PPT)

Outputs ­ movement of…

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River, floods and management Keywords Physical Geography Revision




Infiltration ­ Water passes through soil and happens quickly at the beginning of a storm because the
water is saturated. Water passes quicker through sand than clay

Interception ­ raindrops are intercepted by leaves and branches as well as grass. Evaporation
removes…

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River, floods and management Keywords Physical Geography Revision




Attrition ­ when the fragments of rock strike each other and the river bed making particles and the
river bed smoother

Vertical erosion ­ more dominant at upper course of river. Makes v-shape valleys by abrasion and
hydraulic action

Lateral erosion- found…

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River, floods and management Keywords Physical Geography Revision




Interlocking spur ­ occurs in the upper course of the river where hills jut out to form a staggered
formation in the valley

Bluff ­ where the valley side slowly slopes and is steadily lowered into the flat flood plain

Eyot ­…

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River, floods and management Keywords Physical Geography Revision




Hazard ­ natural event that threatens both life and property

River management ­ strategies are put in place to prevent flooding and ensure there is enough
water

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