All we've done
- Created by: Rosie McDowell
- Created on: 03-10-16 19:44
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- River processes
- Water Cycle
- Inputs
- Precipitation
- Water vapour condenses into rain, hail, sleet, snow or drizzle
- Precipitation
- Outputs
- River discharge
- Storage
- Interception
- Water caught by vegetation in the atmosphere
- Soil moisture
- Water stored in the soil
- Ground water
- Water stored in porous rocks deep underground
- Surface storage
- Water flowing to lakes or oceans
- Interception
- Transfers
- Surface run off
- Water moves across the surface of the earth as a stream, tributary or lake
- Through-flow
- Water moves downhill through the soil
- Infiltration
- Water soaks (filters) into the ground
- Percolation
- Water moves from the soil to the rocks deep underground
- Ground water flow
- Water moves slowly through the soil and rocks and back into the sea
- Stem flow
- Water flowing down stems of plants and trunks of trees
- Condensation
- Water changing from gas to liquid
- Evaporation
- Water transformed from sea water into water vapour in the atmosphere
- Surface run off
- Inputs
- Long profile
- Discharge
- How much water passes a particular point at a particular time
- Width
- How narrow or wide a river is
- Depth
- How shallow or deep the river is
- Velocity
- The speed of the river
- Load
- Amount of material that a river is carrying. Faster the velocity the more load
- Gradient
- Steepness of the slope
- Discharge
- Erosion processes
- Solution
- Weak acid chemicals in the water react with the rock and dissolves soluble minerals
- Hydraulic action
- Sheer force of water pounding into a crack and causing the air to move in deeper, creating a bigger crack and dropping materials
- Attrition
- The rocks knock against each other and wear eachother down
- Abrasion
- Force of moving water in the river throws rocks its carrying dislodging more material and also run them together making them smaller and smoothe
- Wearing away of rock and soil in a river bed and bank
- Solution
- Transportationprocesses
- Rivers pick up and carry material as they flow.
- Solution
- Minerals are dissolved in the water and carried along in solution
- Saltation
- Small pebbles and stones are bounced along the river bed.
- Traction
- Large boulders and rocks roll along the river bed
- Suspension
- Materials carried along in the water and held up in the flow of the river
- Deposition
- When material is dropped by a river heaviest first
- Drops the heaviest first as the river doesn't have enough energy or the river is slowing down.
- The drainage basin
- Mouth
- The place where the river flows into the sea
- River channel
- The main body of water, flowing down hill
- Water shed
- High land or boundary separating one drainage basin from another
- Confluence
- The point where two rivers mee
- Tributary
- A small river or stream that joins a bigger river
- Source
- Starting point of a river usually at the top of a hil
- Drainage Basin - area of land drained by a river and its tributaries
- Mouth
- Water Cycle
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