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Ephemeral Stream |
  
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Ephemeral Stream |
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Definition These streams are generally storm-event driven and flow occurs less than 20% of the time; these streams have a limited (if any) baseflow component with no groundwater discharge. Description Most streams in the drier parts of South Africa such as the Karoo and Kalahari are ephemeral in nature. Typically flow is a result of heavy or persistent rains and flow usually ceases within days of the rainfall event. Why are ephemeral rivers important? Groundwater potentially plays an important role in sustaining aquatic ecosystems during dry periods.
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