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Drainage patterns  Dendritic     Trellis Rectangular Deranged Parallel Radial   Centripetal    

Types of rivers Permanent Rivers Permanent Rivers have water all year round. Periodic Rivers Rivers that run dry on occasion, usually located in arid climates where evaporation is greater than precipitation. Episodic Rivers Rarely occurring rivers formed from run-off channels in very dry regions. Exotic Rivers These are rivers that flow through arid (desert) regions. An example of… Read More »

Important concepts  Drainage basin Catchment area A area drained by a river and all its tributaries.   Watershed An area or ridge of land that separates waters flowing to different rivers, basins, or seas. River system A river system is defined as a group of rivers discharging water by way of a common flow… Read More »

Catchment and River Management Importance of managing drainage basins and catchment areas Impact of people on drainage basins and catchment areas   Case study of one catchment area management strategy in South Africa Soweto River Catchment Area 

Drainage Systems in South Africa