Rivers and Flooding Flashcards

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  • Make sure you understand the information on each card. If something’s unclear, click the link to the revision notes at the bottom of the page for more details.

2️⃣ Test yourself:

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3️⃣ Consistently Review and Practice:

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Note: We may include questions that have multiple correct answers. It’s useful to remember specific examples to understand these concepts better.

What is a river flood?

A river flood occurs when a river overflows its banks and water spreads onto nearby land areas due to the volume of water exceeding the river’s capacity.

How does precipitation influence flood risk?

Heavy or prolonged rainfall can overwhelm rivers, persistent rainfall saturates the ground, and seasonal patterns like monsoons can increase the likelihood of floods.

What role does geology play in flood risk?

Geology affects flood risk through permeability (how quickly water infiltrates the ground), impermeable layers (which increase runoff), and aquifers and springs that can discharge water into rivers.

How does relief affect flood risk?

Steep slopes cause faster runoff, increasing flash flood risk, while narrow valleys can lead to rapid water accumulation and rising floodwaters.

What impact does urbanisation have on flood risk?

Urbanisation increases flood risk by replacing natural surfaces with impermeable materials, leading to more surface runoff and potential flash flooding.

How do agricultural practices and deforestation influence flood risk?

Poor land management and deforestation reduce rainfall interception and increase runoff, erosion, and sedimentation in rivers, thereby increasing flood risk.

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