Unit 7: Option A — Freshwater: Drainage Basins
Topic 7.1: Drainage basin hydrology and geomorphology Questions
Practice 20 exam-style questions for IB Geography Topic 7.1. Review the question stems below, then unlock the full Question Bank to access markschemes, model answers, and AI grading.
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River discharge is the volume of water passing a point each…
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Moving downstream, discharge and hydraulic radius usually…
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The table shows the peak annual discharge of a small river recorded in two decades.
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Outline how river discharge and hydraulic radius are related as you move downstream.
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Lag time on a storm hydrograph is the gap between…
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Which factor would lengthen a basin's lag time?
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Outline one river-erosion landform, other than a waterfall, and describe one of its main features.
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A drainage basin is the area of land that is…
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Outline two factors that would increase the amount of overland flow in a drainage basin.
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A short lag time and high peak discharge describe a basin that is…
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Abrasion erodes a river channel when…
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Outline two physical factors, other than rock type, that can make a drainage basin respond quickly to a storm.
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Building roads and houses on a basin tends to…
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A waterfall retreats upstream because…
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A delta is most likely to form where a river…
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Explain the sequence of depositional processes by which a river builds a delta.
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The table lists some of the world's tallest waterfalls.
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The table gives the grid positions of four points along a large river basin (1 grid unit = 40 km).
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The table summarises features read from a satellite image of part of a river basin.
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A river deposits its load mainly when…
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