Drainage Patterns (Grade 12 NSC Matric Geography): Flashcards
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What drainage patterns are
What drainage patterns are
Distinctive arrangements created by rivers/streams on landscape
Why dendritic pattern is named 'dendritic'
Why dendritic pattern is named 'dendritic'
Greek for tree; resembles tree branching structure
Angle tributaries join main river in dendritic pattern
Angle tributaries join main river in dendritic pattern
Acute angles (sharp angles, less than 90°)
Rock type where dendritic pattern forms
Rock type where dendritic pattern forms
Homogeneous rock with uniform resistance to erosion
Appearance of trellis drainage pattern
Appearance of trellis drainage pattern
Rectangular network like garden trellis or lattice fence
Angle tributaries join main streams in trellis pattern
Angle tributaries join main streams in trellis pattern
Right angles (90°)
Rock conditions where trellis pattern forms
Rock conditions where trellis pattern forms
Alternating hard/soft rock or folded sedimentary rock
Appearance of radial drainage pattern
Appearance of radial drainage pattern
Spreads outward from centre like bicycle wheel spokes
Landforms where radial pattern forms
Landforms where radial pattern forms
Isolated elevated landforms: volcanoes, domes, mountains
Quick angle ID for drainage patterns
Quick angle ID for drainage patterns
Acute=dendritic, 90°=trellis, radiating from centre=radial