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4.7 - Oxbow Lakes, Levees, Braided Channels and Deltas

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✅EvaluateQuestion 1 of 21

An oxbow lake is formed when a river:

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✅EvaluateQuestion 2 of 21

Natural levees are:

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✅EvaluateQuestion 3 of 21

A braided channel is best described as a river with:

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✅EvaluateQuestion 4 of 21

A delta forms mainly due to:

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✅EvaluateQuestion 5 of 21

The branching channels found on a delta are called:

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✅EvaluateQuestion 6 of 21

After a cut-off, the ends of the abandoned meander usually become sealed by:

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✅EvaluateQuestion 7 of 21

Which condition is MOST favourable for delta growth?

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✅EvaluateQuestion 8 of 21

After heavy rain, a bend on the Rio Cobre (Jamaica) is cut through and a crescent-shaped water body is left behind. What feature has formed?

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✅EvaluateQuestion 9 of 21

Which sequence correctly shows the main stages of oxbow lake formation?

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✅EvaluateQuestion 10 of 21

During a flood, which deposit is MOST likely to build up closest to the river channel and help form natural levees?

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✅EvaluateQuestion 11 of 21

A river in northern Trinidad carries lots of sand and gravel. In the dry season it splits into several shallow channels around islands, then shifts after floods. Which factor BEST explains the pattern?

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✅EvaluateQuestion 12 of 21

A student claims “A delta will always form where a river meets the sea.” Which statement BEST corrects this?

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✅EvaluateQuestion 13 of 21

On a coastal plain in Guyana, a small stream runs parallel to the main river for a distance before joining it. This is MOST likely due to:

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✅EvaluateQuestion 14 of 21

A river enters a calm lagoon on the Caribbean coast of Belize and begins to split into several smaller channels. What is the BEST term for these smaller channels?

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✅EvaluateQuestion 15 of 21

A river carries a large sediment load, but its mouth is on an exposed Atlantic-facing coast with strong waves and currents. Which outcome is MOST likely?

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✅EvaluateQuestion 16 of 21

Which pair correctly matches feature to dominant process?

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✅EvaluateQuestion 17 of 21

In one year, an oxbow lake silts up by 6 cm on average. Approximately how much infilling would occur in 15 years?

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✅EvaluateQuestion 18 of 21

Which set of statements is correct? 1. A cut-off is most likely during high discharge. 2. Levees are built mainly by flood deposition. 3. Braided channels commonly have shifting bars and islands. 4. Distributaries are channels feeding INTO the main river.

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✅EvaluateQuestion 19 of 21

A town builds high embankments along a river to act like levees. Later, a breach occurs during a storm. Why can the flooding be especially damaging?

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✅EvaluateQuestion 20 of 21

A student compares two rivers. River X has one main meandering channel on a wide floodplain. River Y has many shallow channels and bars that change position after floods. Which interpretation is BEST?

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✅EvaluateQuestion 21 of 21

Why can fine clay settle faster at a river mouth than expected when it meets seawater?

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✅EvaluateQuestion 1 of 21

An oxbow lake is formed when a river:

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