The drainage basin is an open system within the global hydrological cycle (Edexcel A-Level Geography): Flashcards

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The drainage basin is an open system within the global hydrological cycle
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Drainage basin

Area of land drained by river & its tributaries

Watershed

High land dividing waters flowing to different rivers

Rain shadow

Dry area on leeward side of mountain

Interception loss

Water retained by plants, later evaporated or transpired

Antecedent soil moisture

Amount of water already in the soil

Throughflow

Lateral transfer of water downslope through soil via pipes & percolines

Saturated overland flow

Upward movement of water table into evaporation zone

Evapotranspiration (EVT)

Combined effect of evaporation & transpiration

Albedo

Proportion of incoming solar radiation reflected by surface

Deforestation impact on drainage basin

↓ EVT, ↑ surface run-off, ↑ flooding potential

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