Master the fundamental definitions and key terms required for A-Level Geography, including drainage basins, weather systems, population dynamics, and basic tectonics.
20 cards
Front
Define a Drainage Basin
Back
The area of land drained by a river and its tributaries. It is bounded by a watershed, which separates one drainage basin from another. Water enters the system through precipitation and leaves via discharge and evaporation.
Front
What is a Hydrograph?
Back
A graph showing the discharge of a river over a period of time. It plots river discharge (usually in cubic meters per second) against time (in hours or days), often used to visualize the river's response to a specific rainfall event.
Front
Define Lag Time in hydrology
Back
The time difference between the peak of the rainfall event and the peak of the river discharge. A short lag time indicates a rapid response to rainfall (high flood risk), while a long lag time suggests a slower response.
Front
What is Throughfall?
Back
Water that drips from the canopy (leaves and branches) directly to the ground. It is distinct from stemflow, which runs down trunks.
Front
Define Infiltration
Back
The downward movement of water from the surface into the soil. The rate at which this occurs is called the infiltration rate, which varies depending on soil texture, vegetation cover, and saturation levels.
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