The document discusses the drainage basin hydrological cycle using a systems theory approach. It describes the hydrological cycle as a system with inputs, flows within storage areas, and outputs. It prompts the reader to identify these elements within a drainage basin, including how humans can influence the cycle, and to describe possible water routes and changes given dry or wet conditions.

1. The drainage basin hydrological cycle: The Systems Theory:

2. Learning Objectives: To describe the features of the drainage basin hydrological cycle and understand the systems model of inputs, flows, storage and outputs. To identify correctly which features of a drainage basin represent which part of the system.

3. What is the Hydrological cycle? Recap our hydrological cycle homework- does anyone need to redo? The hydrological cycle is an example of a system – Write a definition of the concept of a system

6. The global hydrological cycle is closed. Drainage basins are open systems interconnected to other systems.

7. Look at fig. 1.3: What are the Main Inputs?… What are the main flows (or transfers) or stores? What are the main outputs? Think about how humans might influence the hydrological cycle.

8. Check you have completed your shaded systems model to show inputs, flows and transfers and outputs.

9. Look at fig. 1.2 and 1.3: Choose one route that water could take through the drainage basin and describe it using at least 10 new words ! (highlight the words to identify clearly where you have used them and that you have used them correctly. Explain how the path the water takes might change if the conditions become; a) very dry after a 6 week period of low rainfall b) Conditions become very wet after an intense 3 day storm. 3. Explain how humans can interfere with and change the drainage basin water cycle.

10. Learning Objectives: RECAP To describe the features of the drainage basin hydrological cycle and understand the systems model of inputs, flows, storage and outputs. To identify correctly which features of a drainage basin represent which part of the system.