GCSE Geography CCEA
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41 topics in 9 modules
☑️ Coastal Environments 10 topics
- Understanding the Features of Coastlines
- Coastal Processes: Erosion and Deposition
- The Impact of Sea Level Changes on the Coast
- Formation and Characteristics of Coastal Landforms
- Role of Waves and Tides in Shaping the Coast
- Human Influence on Coastal Areas: Development and Land Use
- The Implication of Climate Change on Coastal Environments
- Measures Taken for Coastal Zone Management and its Effectiveness
- Adapting to the Risks Associated with Coastal Processes
- Case Study: Coastal Management Schemes and their Success
☑️ River Environments 5 topics
- The Drainage Bain: A Component of the Water Cycle
- River Processes and Landforms
- Sustainable Management of Rivers
- Coastal Processes and Landforms
- Sustainable Management of Coasts
☑️ Our Changing Weather and Climate 4 topics
- Measuring the Elements of the Weather
- Factors Affecting Climate
- Weather Systems Affecting the British Isles
- The Impact of Extreme Weather
☑️ The Restless Earth 4 topics
- Plate Tectonics Theory
- Basic Rock Types
- Managing Earthquakes
- Volcanoes: Characteristics and Consequences
☑️ Populations and Migration 2 topics
- Population Growth, Change and Structure
- Causes and Impacts of Migration
☑️ Changing Urban Areas 3 topics
- Urban Land Use
- Issues Facing Inner City Areas in MEDCs
- Urbanisation in MEDCs and LEDCs
☑️ Contrasts in World Development 3 topics
- The Development Gap
- Sustainable Solutions to the Problem of Unequal Devlopment
- Globalisation
☑️ Managing our Environment 3 topics
- Human Impact on the Environment
- Strategies to Manage our Resources
- Sustainable Tourism to Preserve the Environment
☑️ Fieldwork 7 topics
- The Geographical Enquiry Process
- Planning, Including Establishing Aims and Hypotheses
- Fieldwork Techniques and Methods
- Processing and Presenting Data
- Analysing and Interpreting Data
- Drawing Conclusions
- Evaluating the Fieldwork
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GCSE Geography CCEA Revision Content
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GCSE Geography CCEA - River Environments - The Drainage Bain: A Component of the Water Cycle Content Preview
River Environments
The Drainage Bain: A Component of the Water Cycle
The Drainage Basin: A Component of the Water Cycle
The Drainage Basin
- A drainage basin is an area of land where water from rain or snowmelt drains downhill into a body of water, such as a river, lake, reservoir, estuary, wetland, sea or ocean.
- It's often referred to as a catchment area.
- The boundary separating different drainage basins is known as a watershed.
Basic Structure of Drainage Basin
- It mainly consists of three parts: The Source, where a river begins, often high in hills or mountains; The Course, the path that the river follows to its mouth; The Mouth, where the river ends by flowing into a larger body of water.
- Other structures include tributaries (smaller rivers or streams flowing into a larger river), the confluence (the point where the main river and its tributaries meet) and the river channel (the course through which the river flows).
Processes in the Drainage Basin
- Infiltration: The process where water on the ground surface enters the soil.
- Percolation: The downward movement of water within the rock under soil surface.
- Throughflow: The movement of water down-slope through the soil layer.
- Surface runoff: The flow of water that occurs when excess rainwater, meltwater, or other sources flows over the Earth's surface.
Components of the Hydrological Cycle in Drainage Basin
- Key processes of the water cycle in a drainage basin include precipitation (rain, snow, etc. falling from the sky), interception (water being prevented from reaching the surface by trees or grass), evapotranspiration (the sum of evaporation and plant transpiration from the Earth's land surface to atmosphere), transpiration (the process where plants absorb water through the roots and then give off water vapor through pores in their leaves), and runoff (water that flows over land surface).
Importance of a Drainage Basin
- A drainage basin is a crucial component of the Earth's water cycle.
- It plays a crucial role in water supply (supports human life and agriculture), filtration of water, and habitat for wildlife.
- They help in flood prevention by absorbing excess water during heavy rainfalls.
Human Impact on Drainage Basins
- Human activities like deforestation, urbanisation and agriculture can significantly impact the functioning of drainage basins.
- These activities can change the natural processes taking place in a drainage basin, often leading to increased surface runoff, soil erosion, and decreased water quality.
- The creation of dams and reservoirs can also alter the natural flow of water within a drainage basin.
Question: Explain how urbanisation can increase surface runoff within a drainage basin.
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