Rivers
Helpful mind map on rivers.
- Created by: konradeke
- Created on: 07-04-14 17:34
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- Rivers
- Erosion
- Hydraulic Action
- The sheer force of the wayer
- Corrasion
- The "sandpapering" effect pebbles rub against eachother
- Abrasion
- Rocks are thrown against the coastline
- Attrition
- Pebbles smaller and rounded
- Solution
- Dissolves bank
- Hydraulic Action
- Flood Defences
- Hard Engineering
- Flood walls and gates
- Channel Straightening
- Dam
- Advantages-Hydroelectricity, Lasts a long time
- Disadvantages- Expensive to build, ugly and areas flooded to create
- Concrete embankments
- Soft Engineering
- Soil Embankments
- Land-use zoning
- The positioning of less important infrastructure closer to the water (e.g car parks) and more important infrastructure further away. This protects valuable infrastructure and uses less important infrastructure as floodplains
- Preparation (e.g sandbags)
- Do Nothing
- Hard Engineering
- Transportation
- Traction
- Large boulders rolled along bottom of river
- Saltation
- Larger pebbles hopping along the bottom of the river
- Suspension
- Small rocks carried in water
- Solution
- Dissolved material
- Traction
- Deposition material dropped because...
- 1. Loses velocity
- 2.Loses discharge
- 3. Meets end (mouth)
- Features
- Upper
- Waterfalls
- 1.Soft rock erodes faster than hard rock (undercutting)
- 2, The hard rock is too heavy and collapses
- 3. Retreated "gorge" and plunge pool created where hard rock fell
- Waterfalls
- Middle
- Meanders
- Lower
- Upper
- Erosion
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