Geomorphology- Drainage basins in South Africa

Lesson content:
• Concepts of
- Drainage basin
- Catchment area
- River system
- Tributary
- Confluence
- Watershed
- Interfluve
- Source
- River mouth
- Surface run-off
- Groundwater
- Water table
• Types of rivers
- Permanent
- Periodic
- Episodic
- Exotic
• Underlying rock structure, development and characteristics of the following drainage patterns:
- Dendritic
- Trellis
- Rectangular
- Radial
- Centripetal
- Deranged
- Parallel
• Definition and factors influencing drainage density
- Precipitation
- Evaporation
- Soil moisture
- Vegetation
- Slope/gradient
- Porosity
- Permeability
• Determining stream order
• Use of topographic maps to determine drainage patterns, drainage density and stream order
• Discharge of a river
- Laminar flow
- Turbulent flow

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