Term
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Definition
| the point which defines the watershed, the location where the watershed all flows to. |
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Term
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Definition
| smaller sub-watersheds are found within larger networks of watersheds |
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Term
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Definition
Subdivisions of a large watershed to create land units
with comparable characteristics.
This simplifies computer modeling
and allows us to identify flow
characteristics at multiple points
within a watershed. |
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Term
| On a topographic map water flows are shown: |
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Definition
| as perpendicular to contour lines |
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Term
| On a topographic map in steeper areas contour lines are depicted: |
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Definition
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Term
| On a topographic map in flatter areas contour lines are depicted: |
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Definition
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Term
| On a topographic map a ridge top or mountain top is depicted by: |
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Definition
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Term
| On a topographic map a valley bottom is depicted by: |
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Definition
| "v" shape pointing uphill in the contour lines |
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Term
| On a topographic map a ridge is depicted by: |
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Definition
| "v" shape pointing downhill |
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Term
| Why is the drainage area so important? |
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Definition
| It reflects the volume of water that is generated during rainfall. It is common in hydrologic design to assume a constant depth of rainfall throughout the watershed. Under this assumption the volume of rainwater available for runoff would be the product of the rainfall depth and drainage area. |
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Term
| What are the three linear measurements used for channel length? |
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Definition
L-The distance measured along the main channel from the watershed outlet to the basin divide.
Lc - The distance from watershed outlet to the end of the channel as indicated on the map.
L10-85 - Distance between two points located at 10 and 85% of the distance from the outlet. |
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Term
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Definition
| Location of the point within the drainage basin that represents the weighted center of the basin. |
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