Explain how the Drainage Basin operates as a system
It is a system based on the transfer of water. Water is entered, it travels through, it is stored, and then it exits.
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Explain the difference between the Hydro-logical Cycle and Drainage Basin System
Hydro-logical Cycle is a closed system, water cannot be added or taken away. Drainage Basin is an open system, water can freely enter and exit.
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List the Main components of a hydrograph
Peak Rainfall: The point of the greatest rainfall. Peak Discharge: The point of greatest discharge. Lag Time: The gap between the peak rainfall and the peak discharge. Rising limb: The increase of discharge. Falling Limb: The fall of discharge.
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Explain the factors that affect the shape of a flood hydrograph
Discharge does not increase immediately because only a small amount of the rainfall actually falls into the channel. Lots of tributaries increase lag time. Small number of tributaries reduce lag time.
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List and describe the 4 types of fluvial erosion
Attrition: Materials colliding with each other. Hydraulic action: The force of the water dislodges particles from river banks and beds. Corrasion: The rubbing of small materials and the river bank. Corrosion: The acid in the river dissolving rocks.
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List and describe the 4 types of fluvial transportation
Traction: Rolling stones along sea bed. Saltation: Sand sized particles 'leap-frogging' Suspension: Carried withing water flow. Solution: Some minerals dissolve in the water.
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Where does deposition occur and why?
Deposition occurs when a river lacks enough energy to carry its load, usually close to the mouth of a river.
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