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Surface Waters

In terms of surface water, the most important hydrological basin is that of Sakia El Hamra, which covers an area of 81,000 km².

The rest consists of poorly individualized diffuse networks, due to the almost horizontal topography, infrequent precipitation, and high evaporation.

The important features that characterize the flows are:

  • The very low number of days of flow in the year, caused by the scarcity of precipitation.
  • The strong floods during significant rainy episodes;
  • The weak parts (in terms of basin area) are active, contributing to the flows.