Draw (terrain): Difference between revisions
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A '''draw''' a terrain feature formed by two parallel [[ridge]]s or [[Spur (mountain)|spur]]s with low ground in between them. The area of low ground itself is the draw, and it is defined by the spurs surrounding it. Draws are similar to valleys on a smaller scale, however while valleys are by nature parallel to a ridgeline, a draw is perpendicular to the ridge, and rises with the surrounding ground, disappearing up-slope. A draw is usually etched in a [[hill|hillside]] by water flow, and often contains a stream or loose rocks from eroded rockfall. |
A '''draw''' a terrain feature formed by two parallel [[ridge]]s or [[Spur (mountain)|spur]]s with low ground in between them. The area of low ground itself is the draw, and it is defined by the spurs surrounding it. Draws are similar to valleys on a smaller scale, however while valleys are by nature parallel to a ridgeline, a draw is perpendicular to the ridge, and rises with the surrounding ground, disappearing up-slope. A draw is usually etched in a [[hill|hillside]] by water flow, and often contains a stream or loose rocks from eroded rockfall. |
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A draw differs from a valley or an arroyo, in that the ground always slopes downward from a draw in only |
A draw differs from a valley or an arroyo, in that the ground always slopes downward from a draw in only one direction, and upward in the other three; while in a valley or arroyo there is only noticeable upward slope in two directions. The slope on a draw is generally quite sharp, with a clearly established fall line and characterized by a generally steep vertical drop over a short horizontal distance. |
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In snowy climates, draws often form chutes for [[avalanches]], particularly with loose snow hanging from an exposed [[Cornice_(climbing)|cornice]] near the top of the ridgeline. |
In snowy climates, draws often form chutes for [[avalanches]], particularly with loose snow hanging from an exposed [[Cornice_(climbing)|cornice]] near the top of the ridgeline. |
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Revision as of 13:42, 4 October 2011
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A draw a terrain feature formed by two parallel ridges or spurs with low ground in between them. The area of low ground itself is the draw, and it is defined by the spurs surrounding it. Draws are similar to valleys on a smaller scale, however while valleys are by nature parallel to a ridgeline, a draw is perpendicular to the ridge, and rises with the surrounding ground, disappearing up-slope. A draw is usually etched in a hillside by water flow, and often contains a stream or loose rocks from eroded rockfall.
A draw differs from a valley or an arroyo, in that the ground always slopes downward from a draw in only one direction, and upward in the other three; while in a valley or arroyo there is only noticeable upward slope in two directions. The slope on a draw is generally quite sharp, with a clearly established fall line and characterized by a generally steep vertical drop over a short horizontal distance.
In snowy climates, draws often form chutes for avalanches, particularly with loose snow hanging from an exposed cornice near the top of the ridgeline.