Drainage Basin, Geography 5.0 / 5 based on 3 ratings ? GeographyWater and riversGCSEAll boards Created by: Niki KleverlaanCreated on: 07-10-12 11:37 What is a drainage basin? area of land drained by a main river and its tributaries 1 of 11 What is the boundary of a river marked by? a ridge of higher land 2 of 11 How is the boundary of a river called? watershed 3 of 11 What is a watershed? the separation between two drainage basins 4 of 11 What is the drainage density? The total length of all the streams in the drainage basin / The total area of the drainage basin 5 of 11 When is the density highest? on impermeable rocks 6 of 11 When is the density lowest? on permeable rocks 7 of 11 Which risks are there when the density is very high? flooding 8 of 11 How is the worlds water divided? 97% seawater 2% stored water 1%fresh water or water vapour 9 of 11 What's the hydrological cycle? a system were the water is recycled over and over again 10 of 11 Why is the hydrological cycle said to be a closed system? because there is no water lost or added to the system 11 of 11
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