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Difficulty: HardLandform Evolution by Running Water and Underground Water

Match each landform generated by running water or groundwater processes on the left with its precise formative geomorphic mechanism on the right.

  • PoljeMassive, flat-floored depression in karst terrain formed by combined structural faulting and extensive lateral solutional planation
  • Braided stream channelNetwork of shallow channels separated by alluvial bars, caused by excessive bed-load sediment deposition surpassing river capacity
  • Natural leveeElongated ridge of coarse sediment accumulated along river banks when overbank floodwaters rapidly lose velocity and discharge
  • UvalaCompound closed depression formed by the progressive coalescence of several adjacent sinkholes or dolines

Answer

Polje matches with the massive, flat-floored karst depression formed by combined structural faulting and solutional planation. Braided stream channel matches with the network of shallow channels separated by alluvial bars created by excessive bed-load deposition. Natural levee matches with the elongated ridge of coarse sediment accumulated along river banks during overbank flooding. Uvala matches with the compound closed depression formed by the progressive coalescence of several sinkholes.
Each landform is paired precisely with its defining formative geomorphic mechanism based on standard physical geography. Poljes represent massive fault-assisted karst solution floors; braided channels stem from channel bed load choking; natural levees result from coarse sediment settling at flood margins; and uvalas form through compound sinkhole coalescence.

Step-by-Step Solution

1
Analyze karst surface depressions by scale and origin
Identify that dolines merge into uvalas, while the massive, structurally controlled karst depression with a flat floor is a polje.
Karst terrain landforms progress systematically from individual sinkholes to uvalas, culminating in structurally downfaulted poljes.
2
Evaluate fluvial depositional mechanisms in middle and lower river courses
Distinguish between channel-splitting alluvial bars (braided stream) and bank-building ridge deposits from overbank floods (natural levees).
Braiding occurs within the river bed due to load exceeding transport capacity, whereas levees build up along the stream margins during flood spillover.
3
Match each landform term directly to its precise process definition
Pair Polje to right_1, Braided stream channel to right_2, Natural levee to right_3, and Uvala to right_4.
Each feature corresponds strictly to its geomorphic definition in senior secondary fluvial and karst geography.

Key Concept

Classification and process attribution of surface fluvial depositional features and subterranean/surface karst solution landforms.
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Topics

Landform Evolution by Running Water and Underground Water

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