Term
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Definition
INCREASES
Discharge is always increasing since tributaries feed more water into the stream. Throughflow, Groundwater Flow and Surface Runoff also increase contributing to discharge. |
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Term
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Definition
INCREASES
Tributaries and flows directly increase 'volume' of water and river width increases due to lateral erosion. |
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Term
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Definition
INCREASES
Tributaries and flows directly increase 'volume' of water and river depth increases due to vertical erosion. |
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Term
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Definition
| Velocity increases since water accelerates downstream due to the forces of gravity. The river is also more efficient since proportionally less water is in contact with the bed and banks thus reducing energy lost to friction. |
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Term
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Definition
INCREASES
As river velocity rises, the river has more energy and is thus capable of carrying more load. |
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Term
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Definition
DECREASES
As a river travels downstream, the eroded material becomes more rounded and smaller due to attrition. |
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Term
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Definition
DECREASES
As a river travels downstream attrition smooths the bed since the bedload is much smoother. |
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Term
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Definition
DECREASES
A river conducts vigorous vertical erosion in the upper course and lateral erosion in the lower course. Water can also only travel downhill due to forces of gravity. |
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Term
NOT INCLUDED
Wetted Perimeter |
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Definition
INCREASES
Wetted Perimeter is the part of the bed and banks which is in direct contact with water. As CSA increases, wetted perimeter must rise |
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Term
NOT INCLUDED
Hydraulic Radius |
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Definition
INCREASES
Proportionally, the increase in CSA > the increase in Wetted Perimeter. It is a measure of efficiency. |
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