Edexcel IGCSE Geography 復(fù)習(xí)筆記 1.1.2 The Drainage Basin

Category: IGCSE課程, 國際課程, 教材筆記, 福利干貨 Date: 2022年7月22日下午3:53

Edexcel IGCSE Geography 復(fù)習(xí)筆記 1.1.2 The Drainage Basin

The Drainage Basin

A?drainage basin?is an?open system
Every drainage basin is unique and is different in shape and size, with different rock types,?relief?and land use

Drainage basin features

All drainage basins have some features in common:
- Watershed
- Source
- Confluence
- Tributary
- Mouth

drainage-basin

Channel network

Every drainage basin is covered by a network of tributaries which connect to the main river channel. The numbers of tributaries in a drainage basin is referred to as the?drainage density:
- Drainage basins with lots of tributaries have a?high drainage density
- Drainage basins with few tributaries have a?low drainage density

Exam Tip

You need to ensure that you are clear about the difference between a closed system such as the hydrological cycle and an open system such as a drainage basin. Remember a closed system has no inputs or outputs whereas an open system has both inputs and outputs.

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