FREE ASBOG Drainage Patterns/Stream Types Questions and Answers


continuous flow of water

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A perennial stream is a river that flows continually all year long, no matter the season.
It is characterized by an uninterrupted flow of water that usually comes from springs, groundwater, and other stable water sources.
In contrast to intermittent or ephemeral streams, which only flow occasionally, such as after rain, perennial streams are always present.

"a region of land where surface water will eventually converge to one location The greatest significant restriction on drainage patterns is topography."

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The arrangement or network of rivers, streams, and other watercourses in a certain geographic area is referred to as a drainage pattern.
They control how surface water moves through the terrain and eventually combines with other smaller bodies of water to form larger ones, like rivers, lakes, or oceans.
According to the definition given, a drainage pattern is a section of land where surface water finally gathers in one spot.
The physical characteristics of the land's surface, or topography, have a big impact on how drainage patterns develop.

"In general, tributary streams follow the slope of the surface by spreading out in a parallel-like pattern. Sometimes the presence of a significant fault cutting across a region of sharply folded bedrock is indicated by a parallel pattern. shallow basin"

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A parallel drainage pattern is defined by tributary streams that run downhill in a pattern resembling parallels as they follow the terrain's slope.
This pattern frequently appears where surfaces are uniformly flat or moderately sloped.
Sometimes a large fault running across a region of severely folded bedrock might produce a parallel drainage pattern.
The fault serves as a natural barrier that directs water along its course, resulting in the tributaries' parallel alignment.

In areas where there are numerous flaws

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A Rectangular Drainage Pattern frequently forms in areas where geological features like faults or joints have an impact on the landscape.
When streams and rivers line themselves with the underlying geological structures, such as faults or fractures, this pattern is created.
Because the drainage channels follow the lines of Earth's crustal weakness, they frequently take the appearance of right-angle bends or rectangles.

"Mount in the center The streams radiate from a central high point in a radial drainage system. Typically, volcanoes have excellent radial drainage. Domes and laccoliths are additional geological structures on which radial drainage frequently occurs. The drainage on these objects may display a variety of radial patterns."

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Streams radiate outward from a central high point in a radial drainage pattern, frequently resembling spokes on a wheel.
On elevated geological features like volcanoes, domes, or laccoliths, this pattern frequently develops.
The streams run away from the predominant high point, following the terrain's natural slope.

a stream that only occasionally flows in the area during and after a time of rainfall

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According to the definition, an ephemeral stream is one that only infrequently flows in a place during and after a time of rainfall.
These streams frequently emerge and disappear depending on the availability of water because they are nourished by rainfall or the melting of transient snow and ice.
Ephemeral streams may be active during rainy seasons or after substantial precipitation events, but they may become inactive during dry spells.

a drainage pattern that may form on uniform rock and has a shape matching the pattern created by tree branches or leaf veins

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A drainage pattern known as a dendritic pattern forms on rock or other terrain that is largely consistent and uniform.
It mimics a leaf's veins or the branching structure of tree branches.
In this pattern, a network of branching channels is formed by the joining of the main river or stream channel and numerous smaller tributaries that feed into it.
When rivers and streams run downwards, eroding the rock or soil uniformly, they follow the paths of least resistance, creating the dendritic pattern.

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