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Water on land
unit 1 gcse aqa
Question | Answer |
---|---|
Different types of transportation | Traction, Saltation, Suspension, Solution |
Different types of erosion | hydraulic action, attrition, abrasion, solution |
Factors Decreasing dischrge | Low rainfall, Permeable Rock, Mild conditions, gentle slopes, rural areas, more vegetation |
Mass Tourism- drawbacks | most profit is kept by companies in medc. tourism jobs=badly paid. traffic congestion. greenhouse gases- global warming. increase in litter. destruction of natural habitats. |
erosion- solution | Chemical in the water weaken the beds. acidic waters w/high pH |
erosion- hydraulic action | the force of the water erodes the bed + bands of the river due to pressure weakening them. |
transportation- traction | large material. rolls on the beds. doesn't lose contact wit the bed. |
transportation- saltation | bouncing of small stones, sand, grains on river beds |
Hard engineering? | man made structures built to control the flow of rivers and reduce flooding |
factors increasing discharge | high rainfall, impermeable rock, hot dry conditions/freezing, steep slops, urban areas |
Waterfall eg | niagara falls |
soft engineering? | are schemes set up using the knowledge of rivers and its processes to reduce the affects of flooding |
why do rivers flood? | physical: prolonged rainfall-saturated soil. snowmelt. heavy rainfall. relief Human: deforestation. Building construction |
Transportation- suspension | carrying of very fine material |
transportation- solution | dissolved material eg, limestone, chalk |
mass tourism- benefits | brings money--> local community projects creates jbs for locals. improved roads,communication,infrastructure |
erosion- attrition | the crashing of the rocks together eroding the banks laterally causing material to get smaller. |
erosion- abrasion | the erosion of the river bottom and the riverbank by material being carried by the river itself |