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Zorluk: KolayDrainage Patterns and River Basin Analysis

On a topographic map extract, V-shaped contour lines crossing a river valley point towards the north-east. In which direction is the river flowing?

  1. South-westCevap
  2. B
    North-east
  3. C
    Towards the upstream delta
  4. D
    Along a gradient where vertical interval meters are directly added to horizontal kilometers

Cevap

The river flows towards the south-west.
On topographic maps, V-shaped contours crossing a stream valley point upstream (toward higher ground). Because the contour V's point north-east, the source of the river is to the north-east, meaning the river flows downstream toward the south-west.

Adım Adım Çözüm

1
Identify the rule for contour line V-shapes in valley landforms
V-shaped contour lines point upstream towards higher land (the river source)
Water flows from high elevation to low elevation, so the apex of the 'V' points up the river valley
2
Determine the downstream flow direction from the given upstream contour orientation
Since the V-shapes point north-east (upstream), the downstream flow direction is the exact opposite
The opposite cardinal direction of north-east is south-west

Anahtar Kavram

Interpretation of V-shaped contour lines for river flow direction
Tahmini Süre:45s
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Konular

Drainage Patterns and River Basin Analysis

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