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Geography rivers

TermDefinition
Source The start of a river
Tributary A smaller stream/river that flows into a larger
Mouth The end of a river
Course The route a river takes to reach the sea
Drainage basin The area of land drained by a river
Estuary The part of a river mouth that is tidal
Confluence The point when two rivers join
The 3 stages of a river Youthful, mature, old age
Abrasion Stones being carried by the river break off/ erode the banks and bed of the river
Attrition Small stones break as they hit off of each other
Solution Materials are dissolved by acid in the water
Hydraulic action The force of moving water erodes river bank and bed
Suspension Light materials such as sand and silt float along in the water
Rolling Large stones are rolled along the bed of a river -traction
Bouncing Pebbles are bounced along the bed - saltation
V-shaped valley Formed in the youthful stage of a river, the force of moving water cuts downwards into the river bed, making it deeper and v-shaped over time
Meanders Curves/bends that are formed in the river by lateral erosion and hydraulic action in the mature stage
Delta When a river slows down at its mouth in the old age stage and the sea is calm the river forms piles of sediments making the river spilt into smaller distributary channels
Created by: KBertier
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