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Which kind of a drainage pattern is formed when tributaries join rivers at almost right angles ?
(CBSE 2010)
- a)Dendritic drainage
- b)Trellis drainage
- c)Rectangular drainage
- d)Radial drainage
Correct answer is option 'B'. Can you explain this answer?
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Which kind of a drainage pattern is formed when tributaries join river...
Trellis drainage pattern is formed when the primary tributaries of main rivers flow parallel to each other and secondary tributaries join them at right angles. For example, rivers in the upper part of the Himalayan region.
A drainage pattern which looks like tree branches with lots of twigs is known as Dendritic drainage pattern. For example, the rivers of northern plain.
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Which kind of a drainage pattern is formed when tributaries join river...
Understanding Trellis Drainage Patterns
Trellis drainage patterns are a unique feature in geomorphology and hydrology, characterized by the arrangement of tributaries and main rivers.
Key Characteristics of Trellis Drainage:
- Right Angles: In a trellis drainage pattern, tributaries join the main river at nearly right angles, creating a distinctive grid-like appearance on the landscape.
- Geological Influence: The formation of this pattern often occurs in areas with alternating layers of resistant and less resistant rocks. The tributaries erode the softer rock more rapidly, leading to a pattern where streams are oriented parallel to the underlying geological structures.
- Topography: This type of drainage is typically found in hilly or mountainous terrains where the valleys are created by erosion along the more easily eroded rock layers, while the ridges consist of harder rock.
Examples of Trellis Drainage:
- River Systems: Many river systems that flow through folded mountain ranges or regions with complex geology showcase trellis patterns. They may resemble the shape of a garden trellis, with the main river serving as the spine and tributaries branching off at right angles.
- Visual Representation: A trellis drainage pattern can often be depicted as a series of parallel streams that intersect with a larger river, resembling the layout of a grid or lattice.
Conclusion:
In summary, the trellis drainage pattern is defined by tributaries that join rivers at almost right angles, primarily influenced by geological structures and topography. Its distinctive appearance is a direct result of the erosion processes acting on varying rock types.
Trellis drainage patterns are a unique feature in geomorphology and hydrology, characterized by the arrangement of tributaries and main rivers.
Key Characteristics of Trellis Drainage:
- Right Angles: In a trellis drainage pattern, tributaries join the main river at nearly right angles, creating a distinctive grid-like appearance on the landscape.
- Geological Influence: The formation of this pattern often occurs in areas with alternating layers of resistant and less resistant rocks. The tributaries erode the softer rock more rapidly, leading to a pattern where streams are oriented parallel to the underlying geological structures.
- Topography: This type of drainage is typically found in hilly or mountainous terrains where the valleys are created by erosion along the more easily eroded rock layers, while the ridges consist of harder rock.
Examples of Trellis Drainage:
- River Systems: Many river systems that flow through folded mountain ranges or regions with complex geology showcase trellis patterns. They may resemble the shape of a garden trellis, with the main river serving as the spine and tributaries branching off at right angles.
- Visual Representation: A trellis drainage pattern can often be depicted as a series of parallel streams that intersect with a larger river, resembling the layout of a grid or lattice.
Conclusion:
In summary, the trellis drainage pattern is defined by tributaries that join rivers at almost right angles, primarily influenced by geological structures and topography. Its distinctive appearance is a direct result of the erosion processes acting on varying rock types.
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