Physical Features of the Okavango Delta: a Land of Surprising Floods and Drylands

The Okavango Delta in Botswana is a unique inland delta known for its dynamic landscape. It features a combination of flooded areas and drylands, creating a diverse environment that supports a wide range of wildlife and plant species. The physical features of this region are shaped by seasonal floods and the natural flow of water from the Angolan highlands.

Geography and Topography

The delta covers approximately 15,000 square kilometers and is characterized by a flat, low-lying terrain. Its topography is mainly composed of floodplains, grasslands, and islands. The landscape is largely shaped by the seasonal flooding that occurs during the rainy season, which transforms the region into a vast network of waterways.

Water Sources and Hydrology

The primary water source for the delta is the Okavango River, which originates from the Angolan highlands. During the rainy season, the river swells and floods the surrounding plains, creating temporary lakes and channels. The water gradually drains into the Kalahari Desert, where it sustains the ecosystem during dry periods.

Flooding and Drylands

The region experiences seasonal flooding, which is vital for maintaining the biodiversity of the delta. During the dry season, large parts of the delta become drylands, supporting different types of vegetation and animal life. This cyclical pattern of floods and drylands creates a dynamic environment that is constantly changing.

  • Floodplains
  • Islands
  • Channels and lagoons
  • Grasslands